Relevant bibliographies by topics / Slot-burners

Academic literature on the topic 'Slot-burners'

Author: Grafiati
Published: 4 June 2021
Last updated: 19 February 2022

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Journal articles on the topic "Slot-burners"

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Lavrentsov, E. M., I. Ya Sigal, A. V. Smikhula, E. P. Dombrowska, O. S. Kernazhytska, and O. V. Marasin. "EXPERIENCE OF DEVELOPMENT, IMPLEMENTATION AND MODERNIZATION OF HOT WATER SUPPLY BOILERS WITH DUAL-SCREENS AND THE SLOT BOTTOM BURNERS." Energy Technologies & Resource Saving, no. 3 (September 20, 2019): 17–26. http://dx.doi.org/10.33070/etars.3.2019.02.

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The increases service life of gas hot water supply boilers with uniform heat supply along of the depth (width) of the combustion chamber for more than 40 years, by using of slot bottom burners was shown. While reducing nitrogen oxide emissions by using of dual-screens its can significantly increase the heat stress of the furnace, the volume of the furnace chamber and the temperature of the flue gases had left unchanged. The boilers with a capacity of 1–10 MW, with the above technical design solutions of the Gas Institute of the NAS of Ukraine, with a total heat capacity of more than 60 GW, continue to be operated and produce in Ukraine and the CIS countries. Installed boilers relatively nitrogen oxide emissions comply with new EU directive (EU) 2015/2193. The using of gas slot bottom burners can reduce nitrogen oxide emissions by approximately 15 % compared to the basic factory vortex types GMG or GMGB installed on many boilers was shown. A project for the reconstruction of boilers TVG-8 (TVG-8M) and KVG-7.56 with an increase in convective surface area by replacing the factory pipe 28x3 mm with 32x3 mm had developed. Using the improved slot bottom burners in particular equipped with calibrated nozzles for precise dosing of natural gas into the air was envisaged. As a result of a research test of the reconstructed boilers for 3-5 years these technical solutions could increase the energy efficiency of existing TVG and KVG boilers up to the current European level —94–95 at rated heat output was shown. Ref.18, Fig.4, Tab. 5.
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Attia, Amr, Ahmed Emara, H. Ayoub, and Ashraf El-Sherif. "THE DESİGN AND İMPLEMENTATİON OF LASER İGNİTİON SYSTEM FORTWOSLOT AND FOUR SLOT EV BURNERS." International Conference on Mathematics and Engineering Physics 9, no. 6 (April 1, 2018): 1–7. http://dx.doi.org/10.21608/icmep.2018.29433.

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3

Fursenko, Roman, Sergey Mokrin, Sergey Minaev, and Kaoru Maruta. "Diffusive-thermal instability of stretched low-Lewis-number flames of slot-jet counterflow burners." Proceedings of the Combustion Institute 36, no. 1 (2017): 1613–20. http://dx.doi.org/10.1016/j.proci.2016.06.121.

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4

Kiani, Mehrdad, Ehsan Houshfar, and Mehdi Ashjaee. "Experimental investigations on the flame structure and temperature field of landfill gas in impinging slot burners." Energy 170 (March 2019): 507–20. http://dx.doi.org/10.1016/j.energy.2018.12.188.

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Kiani, Mehrdad, Ehsan Houshfar, and Mehdi Ashjaee. "An experimental and numerical study on the combustion and flame characteristics of hydrogen in intersecting slot burners." International Journal of Hydrogen Energy 43, no. 5 (February 2018): 3034–49. http://dx.doi.org/10.1016/j.ijhydene.2017.12.126.

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6

Osintsev, K. V. "Improving the reliability of the furnace and gas conduits of a Babcock-Wilcox boiler during the firing of natural gas in bottom slot burners." Thermal Engineering 57, no. 4 (April 2010): 273–81. http://dx.doi.org/10.1134/s0040601510040014.

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7

Bedii Özdemir, İ. "Use of Computational Combustion in the Development and Design of Energy-Efficient Household Cooker-Top Burners." Journal of Energy Resources Technology 139, no. 2 (November 29, 2016). http://dx.doi.org/10.1115/1.4035256.

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In order to design energy efficient cooker-top burners, the stabilization mechanisms of partially premixed flames were investigated. Different design features are assessed with the identical fuel (CH4), fuel flow rate, and load vessel arrangement, but with different levels of primary aeration and flame delivery. k–ε Reynolds-averaged Navier–Stokes (RANS) simulations are performed using the modified temperature-composition pdf method and the intrinsic low-dimensional manifold (ILDM) reduction scheme. The results show that the optimum value of the angle of flame delivery is about 30–35 deg. The contact area of the flame cup under the bottom surface depends on the diameter of the burner head which determines the separation of the flames. The traditional solution to reduce the port separations, which is to increase the number of ports, is shown to cause weak flames which extinguish in shorter distances and can have strong tendency to blow off. It also causes significant pressure resistance ahead of the contraction tube and so impairs the primary aeration. In the present study, a new slot profile, named the double-V form, is proposed and shown to be very effective in reducing the gaps between the flames, without creating any further pressure resistance.
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8

Sangl, J., C. Mayer, and T. Sattelmayer. "Dynamic Adaptation of Aerodynamic Flame Stabilization of a Premix Swirl Burner to Fuel Reactivity Using Fuel Momentum." Journal of Engineering for Gas Turbines and Power 133, no. 7 (March 16, 2011). http://dx.doi.org/10.1115/1.4002659.

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Due to the expected increase in available fuel gas variants in the future and the interest in independence from a specific fuel, fuel flexible combustion systems are required for future gas turbine applications. Changing the fuel used for lean premixed combustion can lead to serious reliability problems in gas turbine engines caused by the different physical and chemical properties of these gases. A new innovative approach to reach efficient, safe, and low-emission operation for fuels such as natural gas, syntheses gas, and hydrogen with the same burner is presented in this paper. The basic idea is to use the additionally available fuel momentum of highly reactive gases stemming from their lower Wobbe index (lower volumetric heating value and density) compared with lowly reactive fuels. Using fuel momentum opens the opportunity to influence the vortex dynamics of swirl burners designed for lowly reactive gases in a favorable way for proper flame stabilization of highly reactive fuels without changing the hardware geometry. The investigations presented in this paper cover the development of the optimum basic aerodynamics of the burner and the determination of the potential of the fuel momentum in water channel experiments using particle image velocimetry. The results show that proper usage of the fuel momentum has enough potential to adjust the flow field to different fuels and their corresponding flame behavior. As the main challenge is to reach flashback safe fuel flexible burner operation, the main focus of the study lies on avoiding combustion induced vortex breakdown. The mixing quality of the resulting injection strategy is determined by applying laser induced fluorescence in water channel tests. Additional OH∗ chemiluminescence and flashback measurements in an atmospheric combustion test rig confirm the water channel results for CH4, CH4/H2 mixtures, H2 with N2 dilution, and pure H2 combustion. They also indicate a large operating window between flashback and lean blow out and show expected NOx emission levels. In summary, it is shown for a conical four slot swirl generator geometry that the proposed concept of using the fuel momentum for tuning of the vortex dynamics allows aerodynamic flame stabilization for different fuels in the same burner.
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Dissertations / Theses on the topic "Slot-burners"

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Ahmed, Shakil, and Jamal Naser. "Aerodynamics of rectangular slot-burners and combustion in tangentially-fired furnace." Swinburne University of Technology, 2005. http://adt.lib.swin.edu.au./public/adt-VSWT20070918.123957.

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The power generation industry in the state of Victoria, Australia stands to gain significantly from process improvements and optimization which can potentially lead to cleaner production of cost effective electricity. The efficient operation of lignite based tangentially-fired combustion systems depends on critical issues such as ignition and combustion of the fuel, which are largely controlled by burner aerodynamics. The geometry of the burner and the ratio of velocities between the primary and secondary jets play an important role in achieving stable combustion, high burnout of fuel, low production of pollutants and control of fouling. Slot-burners are a vertically aligned stack of rectangular nozzles delivering primary fuel and secondary air jets, and are commonly used in tangentially-fired boilers. To obtain a better understanding of the overall combustion process, it is important to understand the aerodynamics of jet development from these burners. The starting point of this research was a CFD investigation of aerodynamics in the near-burner region of isolated rectangular slot-burners, using isothermal conditions, for various secondary to primary jet velocity ratios (φ). Cross-flow was then added to replicate a near-burner flow field similar to that found in a tangentially-fired furnace and the effect of changing φ in the near-burner region of the developing jets was again investigated. Experiments were carried out on an isothermal physical-burner model to obtain mean velocity and turbulent statistics for different nozzle geometries and a range of φ. A computational fluid dynamics investigation of these same jets was also performed to gain further insights into the complexities of flow field with experimental results used to validate CFD predictions. The primary jet substantially deviated from the geometric axis of the burner towards the furnace wall and became very unstable for higher φ. The causes of unfavourable aerodynamics were discussed and suggestions were made on possible remedies for such behaviour. Conventional lignite combustion in a full-scale tangentially-fired furnace was modelled. The model was used to assess the possibility of utilizing a new type of mechanically thermally dewatered (MTE) coal in existing furnaces.
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Conference papers on the topic "Slot-burners"

1

Sangl, J., C. Mayer, and T. Sattelmayer. "Dynamic Adaptation of Aerodynamic Flame Stabilization of a Premix Swirl Burner to Fuel Reactivity Using Fuel Momentum." In ASME Turbo Expo 2010: Power for Land, Sea, and Air. ASMEDC, 2010. http://dx.doi.org/10.1115/gt2010-22340.

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Abstract:
Due to the expected increase in available fuel gas variants in the future and the interest in independence from a specific fuel, fuel flexible combustion systems are required for future gas turbine applications. Changing the fuel used for lean premixed combustion can lead to serious reliability problems in gas turbine engines caused by the different physical and chemical properties of these gases. A new innovative approach to reach efficient, safe and low-emissions operation for fuels like natural gas, syntheses gas and hydrogen with the same burner is presented in this paper. The basic idea is to use the additionally available fuel momentum of highly reactive gases stemming from their lower Wobbe index (lower volumetric heating value and density) compared to lowly reactive fuels. Using fuel momentum opens the opportunity to influence the vortex dynamics of swirl burners designed for lowly reactive gases in a favorable way for proper flame stabilization of highly reactive fuels without changing the hardware geometry. The investigations presented in the paper cover the development of the optimum basic aerodynamics of the burner and the determination of the potential of the fuel momentum in water channel experiments using particle image velocimetry (PIV). The results show that a proper usage of the fuel momentum has enough potential to adjust the flow field to the different fuels and their corresponding flame behavior. As the main challenge is to reach flashback safe fuel flexible burner operation, the main focus of the study lies on avoiding combustion induced vortex breakdown (CIVB). The mixing quality of the resulting injection strategy is determined applying laser induced fluorescence (LIF) in water channel tests. Additional OH* chemiluminescence and flashback measurements in an atmospheric combustion test rig confirm the water channel results for CH4, CH4/H2 mixtures, H2 with N2 dilution and pure H2 combustion. They also indicate a large operating window between flashback and lean blow out and show expected NOx emission levels. In summary, it is shown for a conical four slot swirl generator geometry that the proposed concept of using the fuel momentum for tuning of the vortex dynamics allows aerodynamic flame stabilization for different fuels in the same burner.
APA, Harvard, Vancouver, ISO, and other styles
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