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Добірка наукової літератури з теми "COMBUSTION STUDIES"

Автор: Grafiati

Опубліковано: 11 вересня 2023

Оновлено: 16 квітня 2024

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Статті в журналах з теми "COMBUSTION STUDIES"

Kinoshita, Y., J. Kitajima, Y. Seki, and A. Tatara. "Experimental Studies on Methane-Fuel Laboratory Scale Ram Combustor." Journal of Engineering for Gas Turbines and Power 117, no. 3 (July 1, 1995): 394–400. http://dx.doi.org/10.1115/1.2814108.

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The laboratory scale ram combustor test program has been investigating fundamental combustion characteristics of a ram combustor, which operates from Mach 2.5 to 5 for the super/hypersonic transport propulsion system. In our previous study, combustion efficiency had been found poor, less than 70 percent, due to a low inlet air temperature and a high velocity at Mach 3 condition. To improve the low combustion efficiency, a fuel zoning combustion concept was investigated by using a subscale combustor model first. Combustion efficiency more than 90 percent was achieved and the concept was found very effective. Then a laboratory scale ram combustor was fabricated and combustion tests were carried out mainly at the simulated condition of Mach 5. A vitiation technique was used to simulate a high temperature of 1263 K. The test results indicate that ignition, flame stability, and combustion efficiency were not significant, but the NOx emissions are a critical problem for the ram combustor at Mach 5 condition.

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Annamalai, K., M. Y. Ibrahim, and J. M. Sweeten. "Experimental Studies on Combustion of Cattle Manure in a Fluidized Bed Combustor." Journal of Energy Resources Technology 109, no. 2 (June 1, 1987): 49–57. http://dx.doi.org/10.1115/1.3231324.

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Manure from cattle feedlots is a renewable energy source which has the potential of supplementing the existing fossil fuels. But the heat content of manure is rather low. Since, the fluidized bed combustion technology has been used for the energy conversion of marginal fuels, such a technology is being explored for the combustion of feedlot manure. A fluidized bed combustor of 0.15 m (6 in.) diameter was used for the combustion tests on manure. Experiments were conducted with −20 to +20 percent excess air and at bed temperatures ranging from 600°C (1112°F) to 800°C (1472°F). Experimental data revealed that the gasification efficiencies ranged from 90 to 98 percent, while the combustion efficiencies varied from 45 to 85 percent. Higher combustion efficiencies were obtained with decreased volatile solids content of manure. The low combustion efficiencies are attributed to the limited residence time available for the volatiles to burn within the reactor.

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MURASE, E., K. HANADA, T. MIYAURA, J. IKEDA, and N. KONISHI. "Experimental Studies of HCCI Combustion : Chemiluminescence Spectral Analysis and Photographic Observation(HCCI, Combustion Processes II)." Proceedings of the International symposium on diagnostics and modeling of combustion in internal combustion engines 2004.6 (2004): 303–10. http://dx.doi.org/10.1299/jmsesdm.2004.6.303.

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Zhang, Qun, Hua Sheng Xu, Tao Gui, Shun Li Sun, Yue Wu, and Dong Bo Yan. "Investigation on Reaction Flow Field of Low Emission TAPS Combustors." Applied Mechanics and Materials 694 (November 2014): 45–48. http://dx.doi.org/10.4028/www.scientific.net/amm.694.45.

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A twin annular premixing swirler (TAPS) combustor model of low emissions was developed in this study. And computational studies on combustion process in the combustor model were carried out. Standard k-ε Turbulence Model, PDF non-premixed combustion model, Zeldovich thermal NOx formation model and DPM two-phase model were employed. The distributions of some key performance parameters such as gas temperature, flow velocity, concentrations of NOx and CO emissions were obtained and analyzed. At the same time, combustion mechanics inside the TAPS combustor model were investigated. The computational results indicated that the TAPS combustor employed in this study does a better job of improving key combustion performances such as combustion efficiency, total pressure recovery and outlet temperature distribution factor, and reducing NOx and CO emissions at the same time.

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Li, Houping, Junrui Shi, Mingming Mao, and Yongqi Liu. "Experimental and numerical studies on combustion characteristics of N 2 -diluted CH 4 and O 2 diffusion combustion in a packed bed." Royal Society Open Science 6, no. 9 (September 11, 2019): 190492. http://dx.doi.org/10.1098/rsos.190492.

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Experimental and numerical studies were conducted to determine the combustion characteristics of gas diffusion combustion in a porous combustor packed with 2.5 mm or 3.5 mm alumina pellets, special attention being focused on the effect of packed bed height ( h ) on combustion, NO and CO emissions. The pollutant emission of diffusion filtration combustion is studied with different packed bed lengths in the range of 40 mm ≤ h ≤ 240 mm, fixed excess air ratio of 1.88 and fixed gas inlet velocity of 0.06 m s −1 . Results show that both immersed and surface flames coexist in the combustor. Although porous media enhance the mixing and diffusion processes, the diffusion flame shape is still observed from the side and top views of the combustor, and the diffusion filtration retains properties of diffusion combustion. The immersed flame is always observed with increase in h , whereas the height of surface flame decreases. The NO emission decreases sharply when h is increased from 40 mm to 120 mm. However, the NO emission decreases slightly when h > 120 mm. In the investigated range of h , it is shown that h has a significant influence on the CO emission, an increase in h leading to a constant increase in CO for the combustors packed with 2.5 mm or 3.5 mm pellets. The maximum CO emission is 662 ppm and the minimum value is 67 ppm. In the scope of this study, the temperature on the external wall of the combustor reaches 434–513°C.

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Johari, Anwar, Ramli Mat, Mohd Johari Kamaruddin, Tuan Amran Tuan Abdullah, Wan Rosli Wan Sulaiman, and Asmadi Ali. "Combustion of Municipal Solid Waste in a Pilot Scale Fluidized Bed Combustor." Advanced Materials Research 931-932 (May 2014): 1015–19. http://dx.doi.org/10.4028/www.scientific.net/amr.931-932.1015.

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Combustion study of municipal solid waste combustion in a pilot scale fluidized bed combustor had been carried out. The work was aimed at demonstrating sustainable combustion of municipal solid waste by employing operating parameters gained from previous studies. The primary and secondary air factor used were AF = 0.8 and AF = 0.6 respectively. The fluidization number was 5Umf and both in-bed and freeboard region temperature distributions were monitored continuously. Results on the combustion studies revealed that the initial bed temperature could be sustained due to high thermal capacity of sand but later dropped due to problem related to the mixing of bulky and heterogeneous components of municipal solid waste and sand.

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Abhang, P. D., R. P. Abhang, and G. R. Pathade. "Combustion studies of Agnihotra Yajnya." Ecology, Environment and Conservation 29 (2023): 96–100. http://dx.doi.org/10.53550/eec.2023.v29i03s.020.

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Agnihotra is a traditional domestic solemnity, performed to maintain harmony between living beings and nature, without harming and by giving respect. Agnihotra, the simplest forms of yajnya performed at sunset/ sunrise in which cow dung is burnt in the copper pot by using cow ghee (clarified butter) and brown rice as oblations along with chanting of mantras of sun and fire. Combustion studies of Agnihotra raw material was done with the analysis of fuel gases using Orsat Analyzer, proximate analysis by Proximate Analyzer, ultimate analysis by CHONS Analyzer and calorific value estimation by using Bomb Calorimeter. Combustion rate was analyzed of by Thermogravimetry Differential Scanning Calorimeter. The fuel analysis of Agnihotra raw material shows incomplete combustion with low calorific value. As raw material is mainly lignocellulosic, combustion takes place with four major steps. Initially Moisture and Volatile Matter get combusted then Cellulose and Hemicellulose material then Lignin compounds and finally Char.

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Seo, Yong Seog, Sung June Cho, Sung Kyu Kang, and Hyun Dong Shin. "Numerical studies of catalytic combustion in a catalytically stabilized combustor." International Journal of Energy Research 24, no. 12 (2000): 1049–64. http://dx.doi.org/10.1002/1099-114x(20001010)24:12<1049::aid-er642>3.0.co;2-7.

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Cheng, Yuwei, Qian Chen, Xiaofei Niu, and Shufeng Cai. "Large Eddy Simulation and Dynamic Mode Decomposition of Supersonic Combustion Instability in a Strut-Based Scramjet Combustor." Aerospace 10, no. 10 (September 29, 2023): 857. http://dx.doi.org/10.3390/aerospace10100857.

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Supersonic combustion instability studies are crucial for the future maturation of scramjet engines. In the present paper, the supersonic combustion instability in a strut-based scramjet combustor is investigated through large eddy simulation and dynamic mode decomposition. The results show significant pressure oscillation in the strut-based scramjet combustor when the air parameters at the combustor inlet and the fuel parameters at the injector outlet are under certain conditions, and these pressure oscillation situations correspond to supersonic combustion instability. The oscillations have multiple dominant frequencies, including relatively low frequency of 2984 Hz, high frequency of 62,180 Hz, and very high frequency of 110,562 Hz. Large pressure oscillations in the strut-based scramjet combustor are closely related to wake instability, shear layer instability, shear layer and wave interactions, and combustion. Reducing the air total temperature at the combustor inlet can attenuate the pressure oscillations, and reducing the fuel flow rate at the injector outlet can also attenuate the pressure oscillations.

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Gulyurtlu, I., T. Crujeira, M. H. Lopes, P. Abelha, D. Boavida, J. Seabra, R. Gonçalves, C. Sargaço, and I. Cabrita. "The Study of Combustion of Municipal Waste in a Fluidized Bed Combustor." Journal of Energy Resources Technology 128, no. 2 (January 30, 2006): 123–28. http://dx.doi.org/10.1115/1.2191507.

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The combustion behavior of municipal solid waste was studied in a pilot fluidized bed combustor. The waste was pelletized prior to its use. Both co-firing with coal and combustion of waste alone were under taken. The combustion studies were carried out on the pilot installation of INETI. The fluidized bed combustor is square in cross section with each side being 300mm long. Its height is 5000mm. There is a second air supply to the freeboard at different heights to deal with high volatile fuels. There was a continuous monitoring of the temperatures in the bed, as well as the composition of the combustion gases. The combustion gases leaving the reactor were let go through the recycling cyclone first to capture most of particulates elutriated out of the combustor. There was a second cyclone, which was employed with the aim of increasing the overall efficiency of collecting solid particles. The gaseous pollutants leaving the stack were sampled under isokinetic conditions for particulate matter, chlorine compounds, and heavy metals. The ash streams were characterized for heavy metals. The results obtained were compared with national legislation. The results obtained suggest that (i) the combustion efficiency was very high, (ii) there was an enrichment of ashes with heavy metals in the cyclones compared to the bed material, (iii) in general, the flue gas emissions were below the permited limits, and (iv) for the compliance with the new European directive for stricter emission limits adequate control devices, like bag filters, should be integrated with refuse derived fuel (RDF) combustion.

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Дисертації з теми "COMBUSTION STUDIES"

Martin, Kendrick. "Switchgrass combustion studies." Thesis, McGill University, 2002. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=29537.

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This thesis presents fundamental research about the combustion gas products and solid phase residue of switch grass combustion. To identify the compounds released during the combustion phase, tests were conducted using a Thermogravimetric Analyzer (TGA) coupled to a Fourier Transform Infrared Spectrometer. These test revealed that aromatic compounds as well as carbon dioxide and water were released.
High Pressure Liquid Chromatography (HPLC) and GCMS/GCFID were also used to identify and semi-quantify polycyclic aromatic hydrocarbons (PAH) and benzene derivatives. From these analyses it was concluded that thermal synthesis was not occurring within an oxidative environment and as such no PAHs were found.
Finally an infrared microscope and a scanning electron microscope were used to study functional group, morphology and metal content change resulting from the combustion process.
This research provided information about the combustion mechanism of switch grass and laid the foundation for pilot-scale testing.

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Atzler, Frank. "Fundamental studies of aerosol combustion." Thesis, University of Leeds, 1999. http://etheses.whiterose.ac.uk/1532/.

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The combustion of clouds of fuel droplets is of great importance in many industrial applications, such as gasoline and diesel engines, gas turbines and furnaces. Here, efficient combustion has to be combined with minimum noxious emissions. Aerosols also might produce a particularly hazardous explosion risk. To optimise their performance a fundamental understanding of the complex processes in aerosol combustion systems is necessary. A fundamental study of aerosol combustion has been conducted to quantify the parameters of importance. For this, a novel aerosol combustion apparatus was developed, that offers a well controlled environment with respect to aerosol properties, temperature, pressure and turbulence. Aerosols were generated using the Wilson cloud chamber principle of expansion cooling, which produces a homogeneously distributed, near monodisperse droplets cloud. Drop sizes of 10 to 30μm, pressures between 100 and 360kPa and temperatures of 263 to 292K were used. Laminar mixtures between the overall equivalence ratios of 0.8 and 1.2 were studied. A considerable burning velocity enhancement of up to 420% was observed. This enhancement was shown to be a function of drop size and liquid fraction. From the study, it was concluded that burning velocity enhancement probably is caused by the increase in surface area due to wrinkling, caused by the development of instabilities. At low temperature (<275K) the formation and destruction of wrinkles and cells was random. At higher temperatures (>290K) cell formation and division was progressive and traceable, like that observed in gaseous flames. Cellular acceleration at these temperatures was similar to that of gaseous flames. Stretch appeared to have a damping effect on the instabilities, caused by the aerosol. Oscillating flames were observed for some experimental conditions and these also showed enhanced flame speeds. These oscillations were possibly caused by aerodynamic interaction between droplets and gas motion ahead of the flame. Also Stretch and radiation probably influenced these oscillations. Inert glass particles in a gaseous fuel-air mixture had no effect on flame speed or structure. However, water aerosols caused significant burning velocity enhancement (50%). These findings contradict the hypotheses that fuel rich pockets, flame propagation through "easy-toburn" regions or a "grid-effect" trigger instabilities in aerosols. Comparison with a linear stability analysis of heat loss from the flame (Greenberg et al.,1998), yielded good qualitative agreement with the data of the present work.

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Haq, Md Zahurul. "Fundamental studies of premixed combustion." Thesis, University of Leeds, 1998. http://etheses.whiterose.ac.uk/1545/.

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The thesis comprises a fundamental study of spherical premixed flame propagation,originating at a point under both laminar and turbulent propagation. Schlieren cine photography has been employed to study laminar flame propagation, while planar mie scattering (PMS) has elucidated important aspects of turbulent flame propagation. Thrbulent flame curvature has also been studied using planar laser induced fluorescence (PLIF) images. Spherically expanding flames propagating at constant pressure have been employed to determine the unstretched laminar burning velocity and the effect of flame stretch, quantified by the associated Markstein lengths. Methane-air mixtures at initial temperatures between 300 and 400 K, and pressures between 0.1 and 1.0 MPa have been studied at equivalence ratios of 0.8, 1.0 and 1.2. Values of unstretched laminar burning velocity are correlated as functions of pressure, temperature and equivalence ratio. Two definitions of laminar burning velocity and their response to stretch due to curvature and flow strain are explored. Experimental results are compared with two sets of modeled predictions; one model considers the propagation of a spherically expanding flame using a reduced mechanism and the second considers a one dimensional flame using a full kinetic scheme. Data from the present experiments and computations are compared with those reported elsewhere. Comparisons are made with iso-octane-air mixtures and the contrast between fuels lighter and heavier than air is emphasized. Flame instability in laminar flame propagation become more pronounced at higher pressures, especially for lean and stoichiometric methane-air mixtures. Critical Peclet numbers for the onset of cellularity have been measured and related to the appropriate Markstein number. Analyses using flame photography clearly show the flame to accelerate as the instability develops, giving rise to a cellular flame structure. The underlying laws controlling the flame speed as cellularity develops have been explored. PMS images have been analysed to obtain the distributions of burned and unburned gas in turbulent flames. These have enabled turbulent burning velocities to be derived for stoichiometric methane-air at different turbulent r.m.s. velocities and initial pressures of 0.1 MPa and 0.5 MPa. A variety of ways of defining the turbulent burning velocity have been fruitfully explored. Relationships between these different burning velocities are deduced and their relationship with the turbulent flame speed derived. The deduced relationships have also been verified experimentally. Finally, distributions of flame curvature in turbulent flames have been measured experimentally using PMS and PLIF. The variance of the distribution increases with increase in the r.m.s. turbulent velocity and decrease in the Markstein number. Reasons for these effects are suggested.

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Ip, Leong-Teng. "Comprehensive Black Liquor Droplet Combustion Studies." Diss., CLICK HERE for online access, 2005. http://contentdm.lib.byu.edu/ETD/image/etd677.pdf.

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Shelil, Nasser. "Flashback studies with premixed swirl combustion." Thesis, Cardiff University, 2009. http://orca.cf.ac.uk/55494/.

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The important conclusion was reached that when combusting H2/CH 4 fuel mixes flashback behaviour approaches that of pure methane for equivalence ratios less than about 0.65, all pressures investigated up to 7 bara and air inlet temperatures of 300 and 473K. Significant deleterious changes in flashback behaviour for H2/CH4 fuel mixes occurred for air inlet temperatures of 673K, although operation at weak equivalence ratios less than 0.65 was still beneficial.

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Proudler, Valerie Kay. "Studies of low temperature n-butane combustion." Thesis, University of Oxford, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.291545.

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Alshalabe, Maysoon Ismaeil. "Experimental studies of forward in situ combustion." Thesis, University of Bath, 1985. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.353693.

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Investigation of forward in situ combustion have been carried out in a 7.3 cm diameter tube having a length of 0.869 m. Experiments at pressures up to 50 psig were made to study combustion characteristics and enhanced oil recovery of three different crude oils, namely North Sea Forties (36.6 °API), Maya Isthmus (32.4 °API) and Maya (22.1 °API). Sand packs were prepared with oil saturations in the range 38-44.32%. Close adiabatic control of the combustion tube was achieved for both dry and wet combustion modes. Detailed production history and overall mass balances are presented. Correlation in both graphical and tabular form is given for air-fuel ratio, oxygen utilisation and normalised combustion velocity. In this respect, the results of the present work show good agreement with those of other workers. Normal wet, partial quenched modes of combustion were produced using WARs up to 3.75 m3/Mm3 (STP). The combustion front temperature was not significantly affected by the cooling effect of the injected water. Under partially quenched conditions, high combustion-steam zone temperatures were achieved. For wet combustion, the oxygen utilisation generally improved slightly. Air requirement, air-oil ratio and fuel consumption all decreased with increased water-air ratio and increased with increased clay content. The velocity of the combustion front (normalised with respect to the air flux) increased in a linear manner as the WAR increased. Increasing the clay content, however, gave rise to a decrease in the combustion front velocity. High oil recovery, at 79.37%, was achieved during normal wet combustion of Forties oil. In sand mixtures containing amorphous silica powder, the combustion exhibited virtually 100% oxygen utilisation, with higher carbon burning rates compared with runs using clay addition. These effects are attributed to the nature and magnitude of the surface area of solid additives, which play an important role in the oxidation mechanisms.

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Clarke, Ralph Henry. "Heat losses in internal combustion engines." Master's thesis, University of Cape Town, 1989. http://hdl.handle.net/11427/8290.

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Bibliography: leaves 119-121.
This thesis deals with the effects of cooling and heat losses in internal combustion engines. The object of this work was to examine and research various cooling concepts and methods to reduce heat loss to engine coolant, improve thermal efficiency and to predict heat transfer values for these alternatives. The optimum system to be considered for possible application to small rural stationary engines. A literature survey was undertaken, covering work performed in the field of internal combustion engine cooling. Besides the conventional cooling system, two concepts emerged for consideration. These were the precision cooling system and the new heat pipe concept, the latter being relatively unknown for internal combustion cooling application. The precision cooling system, consists of a series of small bore tubes conducting coolant only to the critical areas of an engine. The theory being that in the conventional systems many regions are overcooled, resulting in excessive heat loss. The heat pipe is a device of very high thermal conductance and normally consists of a sealed tube containing a small quantity of fluid. Under operating conditions the tubular container becomes an evaporator region in the heat input area and a condenser region in the heat-out area. It is therefore basically a thermal flux transformer,attached to the object to be cooled. The heat pipe performance is also capable of being modulated by varying its system pressure. This is a positive feature for internal combustion engine application in controlling detonation and NOx emissions. Various facts were obtained from the literature survey and considered in the theoretical review. These facts were extended into models, predicting the heat transfer performance of each concept in terms of coolant heat outflow and heat transfer coefficients. The experimental apparatus was based on an automotive cylinder head with heated oil passing through the combustion chamber and exhaust port to simulate combustion gases. Experiments were conducted on this apparatus to validate the predicted theoretical performance of the three concepts. Tests were also made to observe the effect of heat pipe modulation and nucleate boiling in the precision system. Concept theory was validated as shown by the experimental and test results. The performance for each system approximated the predicted heat transfer and heat loss values. By comparison of the heat input, coolant heat outflow values and heat transfer coefficients it was found that the precision system was the most efficient, followed by the heat pipe and the conventional system being the least efficient. It was concluded that the heat loss tests provided a valuable insight into the heat transfer phenomenon as applied to the three systems investigated. This work also illustrated the effects of the variation of coolant flow, velocity and influence of nucleate boiling. This thesis has shown the potential of the systems tested, for controlling heat losses in internal combustion engines. The research work has created a data base for further in-depth evaluation and development of the heat pipe and the precision cooling system. Based on the findings of the experimental work done on this project, several commercial applications exist for the heat pipe and precision cooling systems. Further in-depth research is recommended to extend their potential in the automotive industry.

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Del, Álamo Gonzalo. "Theoretical studies on hydrogen ignition and droplet combustion." Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 2006. http://wwwlib.umi.com/cr/ucsd/fullcit?p3211822.

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Thesis (Ph. D.)--University of California, San Diego, 2006.
Title from first page of PDF file (viewed June 14, 2006). Available via ProQuest Digital Dissertations. Vita. Includes bibliographical references (p. 126-135).

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Yang, Jiansheng. "Vision-based measurement for combustion and vibration studies." Thesis, University of Sheffield, 2016. http://etheses.whiterose.ac.uk/11650/.

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Vision-based measurement as a useful tool has been applied successfully in many applications. The aim of this thesis is to apply vision-based measurement in both combustion and vibration studies. The purpose is to process and analyse the recorded light information for understanding combustion and vibration conditions. The chemiluminescence emission from a flame contains fundamental information on combustion, and the reflected light from an object’s surface can also provide information on the condition of the measured object. These types of information can be recorded quantitatively into images through a camera. Further processing and analysis of the image data can explore useful information. In this work, a high-speed stereo colour imaging system is employed for both combustion and vibration studies. In each study, a suitable methodology is developed. In a premixed hydrocarbon flame, the blue-green flame colour is mostly attributed to the presence and mixture of chemiluminescence emissions of CH* and C2*. The modern colour camera with the colour filter array (CFA) scheme inherently encodes with red, green, and blue wide-band wavelength filters. According to the aforementioned principles, a flexible image colour model is proposed to detect flame chemiluminescence emissions of CH* and C2*. A sensor calibration process is employed to refine the CH* and C2* concentration expressions based on different camera sensor spectral sensitivities. The detected CH*/C2* ratio is utilised to analogue the fuel/air ratio for combustion diagnostics. Two cases of flame propagation in tubes and flame ignition to impinging are studied using this proposed image colour-based flame chemiluminescence measurement. Combined with stereo imaging and high-speed imaging, the ability of the proposed method to perform multi-dimensional measurement is demonstrated. The reflected light from the measured object is the result of the interaction between the incident light and the object’s surface. A camera captures the illumination of the reflected light as intensity in an image. When the positions of the light source and camera are fixed, any image intensity variation from the reflected light could indicate the object’s movement. Hence, the measured images of a vibrating object would show intensity fluctuations. Based on this, an image intensity fluctuation-based vibration measurement is proposed. Two cases, wind turbine blade vibration monitoring and industrial coupling rotation-vibration testing, are studied using the proposed method. The ability of the image intensity fluctuation-based vibration measurement to perform one-dimensional and two-dimensional measurements is demonstrated successfully.

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Книги з теми "COMBUSTION STUDIES"

Jet Propulsion Laboratory (U.S.), ed. ASRM combustion instability studies. [Pasadena, Calif.?]: Jet Propulsion Laboratory, California Institute of Technology, 1992.

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T, Kalghatgi G., and Institute of Physics. Combustion Physics Group, eds. Spectroscopy in combustion studies. Bristol: IOP Publishing, 1990.

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Smith, Alex C. Spontaneous combustion studies of U.S. coals. Pittsburgh, Pa: U.S. Dept. of the Interior, Bureau of Mines, 1987.

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Smith, Alex C. Large-scale studies of spontaneous combustion of coal. Pgh. [i.e. Pittsburgh] PA: United States Dept. of the Interior, Bureau of Mines, 1991.

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Alberta. Scientific and Engineering Services and Research Division. Some combustion studies of Alberta coals. Edmonton, AB: Alberta Energy, Scientific and Engineering Services and Research Division, 1989.

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Alberta. Alberta Energy. Research and Technology Branch. and Alberta Office of Coal Research and Technology., eds. Some recent studies of coal combustion and gasification. Edmonton: Alberta Energy, Research and Technology Branch, 1992.

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F, Hamady, Somerton C, and United States. National Aeronautics and Space Administration., eds. Stratified charge rotary engine combustion studies: Progress report. [Washington, DC: National Aeronautics and Space Administration, 1989.

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T, Godai, and United States. National Aeronautics and Space Administration., eds. Studies of solid propellant combustion with pulsed radiography. Washington, DC: National Aeronautics and Space Administration, 1987.

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Rubtsov, Nickolai, Mikhail Alymov, Alexander Kalinin, Alexey Vinogradov, Alexey Rodionov, and Kirill Troshin. Remote studies of combustion and explosion processes based on optoelectronic methods. au: AUS PUBLISHERS, 2022. http://dx.doi.org/10.26526/monography_62876066a124d8.04785158.

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The main objective of this book is to acquaint the reader with the main modern problems of the multisensor data analysis and opportunities of the hyperspectral shooting being carried out in the wide range of wavelengths from ultraviolet to the infrared range, visualization of the fast combustion processes of flame propagation and flame acceleration, the limit phenomena at flame ignition and propagation. The book can be useful to students of the high courses and scientists dealing with problems of optical spectroscopy, vizualisation, digital recognizing images and gaseous combustion. The main goal of this book is to bring to the attention of the reader the main modern problems of multisensory data analysis and the possibilities of hyperspectral imaging, carried out in a broad wave-length range from ultraviolet to infrared by methods of visualizing fast combustion processes, propagation and flames acceleration, and limiting phenomena during ignition and flame propagation. The book can be useful for students of higher courses and experimental scientists dealing with problems of optical spectroscopy, visualization, pattern recognition and gas combustion.

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Schetz, Joseph A. Studies in scramjet flowfields. [S.l.]: American Institute of Aeronautics and Astronautics, 1987.

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Частини книг з теми "COMBUSTION STUDIES"

Nilsson, Elna J. K., and Alexander A. Konnov. "Flame Studies of Oxygenates." In Cleaner Combustion, 231–80. London: Springer London, 2013. http://dx.doi.org/10.1007/978-1-4471-5307-8_10.

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Hayes, R. E., and S. T. Kolaczkowski. "Experimental Studies." In Introduction to Catalytic Combustion, 505–87. London: Routledge, 2021. http://dx.doi.org/10.1201/9780203750186-5.

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Stone, Richard. "Case Studies." In Introduction to Internal Combustion Engines, 522–49. London: Macmillan Education UK, 1992. http://dx.doi.org/10.1007/978-1-349-22147-9_14.

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Stone, Richard. "Case studies." In Introduction to Internal Combustion Engines, 427–47. London: Macmillan Education UK, 2012. http://dx.doi.org/10.1007/978-1-137-02829-7_15.

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Stone, Richard. "Case studies." In Introduction to Internal Combustion Engines, 555–81. London: Macmillan Education UK, 1999. http://dx.doi.org/10.1007/978-1-349-14916-2_14.

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Stone, Richard. "Case Studies." In Introduction to Internal Combustion Engines, 261–87. London: Macmillan Education UK, 1985. http://dx.doi.org/10.1007/978-1-349-17910-7_10.

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Tranter, Robert S., and Kenneth Brezinsky. "Shock Tube Studies of Combustion Relevant Elementary Chemical Reactions and Submechanisms." In Cleaner Combustion, 629–52. London: Springer London, 2013. http://dx.doi.org/10.1007/978-1-4471-5307-8_24.

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Fittschen, Christa. "Kinetic Studies of Elementary Chemical Steps with Relevance in Combustion and Environmental Chemistry." In Cleaner Combustion, 607–28. London: Springer London, 2013. http://dx.doi.org/10.1007/978-1-4471-5307-8_23.

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Purser, D. A., and W. D. Woolley. "Biological Studies of Combustion Atmospheres." In Advances in Combustion Toxicology,Volume I, 38–64. Boca Raton: CRC Press, 2023. http://dx.doi.org/10.1201/9781003418948-4.

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Hayes, R. E., and S. T. Kolaczkowski. "Combustion Applications: Examples of Modelling Studies." In Introduction to Catalytic Combustion, 589–649. London: Routledge, 2021. http://dx.doi.org/10.1201/9780203750186-6.

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Тези доповідей конференцій з теми "COMBUSTION STUDIES"

Deshpande, Alok, and Jeevan Jaidi. "CFD STUDIES OF FLAMELESS COMBUSTION." In Proceedings of the 24th National and 2nd International ISHMT-ASTFE Heat and Mass Transfer Conference (IHMTC-2017). Connecticut: Begellhouse, 2018. http://dx.doi.org/10.1615/ihmtc-2017.1580.

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Ju, Yiguang, Joseph K. Lefkowitz, Tomoya Wada, Xueliang Yang, Sang Hee Won, and Wenting Sun. "Plasma assisted combustion: kinetic studies and new combustion technology." In 53rd AIAA Aerospace Sciences Meeting. Reston, Virginia: American Institute of Aeronautics and Astronautics, 2015. http://dx.doi.org/10.2514/6.2015-0156.

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YOON, W., and T. CHUNG. "Numerical studies of supersonic/hypersonic combustion." In 30th Aerospace Sciences Meeting and Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1992. http://dx.doi.org/10.2514/6.1992-94.

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Frezzotti, Maria L., Andrea Terracciano, Francesco Nasuti, Sarah Hester, and William E. Anderson. "Low-order model studies of combustion instabilities in a DVRC combustor." In 50th AIAA/ASME/SAE/ASEE Joint Propulsion Conference. Reston, Virginia: American Institute of Aeronautics and Astronautics, 2014. http://dx.doi.org/10.2514/6.2014-3485.

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Kinoshita, Y., J. Kitajima, Y. Seki, and A. Tatara. "Experimental Studies on Methane-Fuel Laboratory Scale Ram Combustor." In ASME 1994 International Gas Turbine and Aeroengine Congress and Exposition. American Society of Mechanical Engineers, 1994. http://dx.doi.org/10.1115/94-gt-369.

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The laboratory scale ram combustor test program has been investigating to obtain fundamental combustion characteristics of a ram combustor which operates from Mach 2.5 to 5 for the super/hypersonic transport propulsion system. In our previous study, combustion efficiency had been found poor, less than 70%, due to a low inlet air temperature and a high velocity at Mach 3 condition. To improve the low combustion efficiency a fuel zoning combustion concept was investigated by using a sub-scale combustor model first. Combustion efficiency more than 90% was achieved and the concept was found very effective. Then a laboratory scale ram combustor was fabricated and combustion tests were carried out mainly at the simulated condition of Mach 5. A vitiation technique was used to simulate a high temperature of 1263 K. The test results indicates that ignition, flame stability and combustion efficiency were not so significant but the NOx emissions are a critical problem for the ram combustor at Mach 5 condition.

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Mordaunt, Christopher J., Seong-Young Lee, Vickey B. Kalaskar, Amy Mensch, Robert J. Santoro, and Harold H. Schobert. "Further Studies of Alternative Jet Fuels." In ASME 2009 International Mechanical Engineering Congress and Exposition. ASMEDC, 2009. http://dx.doi.org/10.1115/imece2009-12940.

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Future gas turbine technology may require that liquid fuels play an additional role as a coolant over a wide range of combustion-chamber operating conditions. Additionally, in order to satisfy greater efficiency and performance goals, gas turbine operating temperatures and pressures are steadily increasing. Given the desire to reduce dependence on foreign fuels and that current hydrocarbon fuels, such as JP-8, are prone to thermal or catalytic decomposition at such elevated conditions, there is great interest in utilizing alternatively-derived liquid fuels. The successful development of a versatile, multiple-use fuel must achieve the desired operational characteristics of high combustion efficiency, excellent combustion stability, acceptable pollutant emission levels, and compatibility with current engine seals. Combustion instability represents a critical area of concern for future gas turbine engines that may burn alternative fuels. Combustion instability is characterized by large, unsteady combustion-chamber pressure oscillations which occur at the characteristic frequencies associated with the acoustic modes of the combustor. The occurrence of combustion-driven instabilities is closely tied to the details of the injection and fuel-air mixing processes, the heat release characteristics, and the degree to which heat release rate couples with the acoustics of the combustor. Additionally, the efficiency and emissions characteristics are also largely determined by the fuel injection, atomization, and mixing processes associated with combustion. As fuel properties and composition vary, effects on combustion efficiency and emissions, especially the formation of nitrogen oxides (NOx) and soot, can be expected. Therefore, changes in these processes attributed to differing fuel properties can have a dramatic affect on the combustion characteristics and require careful consideration through a well-coordinated combustion research program. The current study investigates whether a coal-based aviation fuel, JP-900, which has the required thermal stability attributes, also satisfies the engine combustion requirements. Additionally, a Fischer-Tropsch fuel and a volumetric 50/50 blend of JP-8 and the Fischer-Tropsch fuel are studied. Previous studies of coal-based fuels have shown that soot production can be a significant problem due to the higher aromatic content than found in conventional fuels. However, improvements in the fuel refinement processes have helped reduce this problem. Experiments included in this current research effort involve studying the combustion instability patterns, the pollutant emission levels, and sooting propensity of coal-based and Fischer-Tropsch fuels as compared to JP-8. The experimental setup consists of an optically-accessible model gas turbine dump combustor, with provisions for laser extinction measurements, which utilizes a Delavan hollow-cone pressure atomizer for fuel injection.

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Alwahabi, Z. T., G. J. Nathan, B. B. Dally, P. R. Medwell, and Z. Sun. "Optics & Photonics for Combustion Diagnostic Studies." In Optical Instrumentation for Energy and Environmental Applications. Washington, D.C.: OSA, 2014. http://dx.doi.org/10.1364/e2.2014.ew4a.1.

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Verhelst, Sebastian, and Roger Sierens. "Combustion Studies for PFI Hydrogen IC Engines." In Asia Pacific Automotive Engineering Conference. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2007. http://dx.doi.org/10.4271/2007-01-3610.

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Rassat, Scot D., Theresa M. Allen, and E. J. Davis. "Raman spectroscopy studies of combustion-related microparticles." In OE/LASE'93: Optics, Electro-Optics, & Laser Applications in Science& Engineering, edited by Larry C. Liou. SPIE, 1993. http://dx.doi.org/10.1117/12.145694.

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Yu, Gong, Jian-Guo Li, Jian-Rong Zhao, Shi-Run Yang, and Chun-Jin Li. "Experimental studies on H2/air supersonic combustion." In Space Plane and Hypersonic Systems and Technology Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1996. http://dx.doi.org/10.2514/6.1996-4512.

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Звіти організацій з теми "COMBUSTION STUDIES"

Sivashinsky, G. I. Studies in premixed combustion. Office of Scientific and Technical Information (OSTI), January 1992. http://dx.doi.org/10.2172/7305286.

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Wendt, J., E. Eddings, J. Lighty, T. Ring, P. Smith, J. Thornock, W. Morris Y Jia, et al. Oxy-coal Combustion Studies. Office of Scientific and Technical Information (OSTI), January 2012. http://dx.doi.org/10.2172/1045472.

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Sivashinsky, Gregory I. Studies in combustion and explosion. Office of Scientific and Technical Information (OSTI), October 1999. http://dx.doi.org/10.2172/758830.

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Slagle, I. R. Studies of combustion kinetics and mechanisms. Office of Scientific and Technical Information (OSTI), November 1997. http://dx.doi.org/10.2172/625832.

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Santoro, R. J. Combustion Studies of Coal Derived Fuels. Fort Belvoir, VA: Defense Technical Information Center, February 2000. http://dx.doi.org/10.21236/ada387539.

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Bowman, Joel. Theoretical Studies of Combustion Dynamics. Final Report. Office of Scientific and Technical Information (OSTI), December 2017. http://dx.doi.org/10.2172/1411715.

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Lempert, Walter R., and Igor V. Adamovich. Kinetic Studies of Nonequilibrium Plasma-Assisted Combustion. Fort Belvoir, VA: Defense Technical Information Center, February 2010. http://dx.doi.org/10.21236/ada524301.

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Williams, Forman A. Fundamental Studies of Liquid-Propellant Rocket Combustion. Fort Belvoir, VA: Defense Technical Information Center, June 2004. http://dx.doi.org/10.21236/ada425218.

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Beaudet, R. A. Combustion-related studies using weakly-bonded complexes. Office of Scientific and Technical Information (OSTI), March 1992. http://dx.doi.org/10.2172/6856817.

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Beaudet, R. A. Combustion-related studies using weakly-bonded complexes. Office of Scientific and Technical Information (OSTI), April 1990. http://dx.doi.org/10.2172/10123737.

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