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Relevant bibliographies by topics / Phase Doppler Particle Analysis (PDPA)

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Academic literature on the topic 'Phase Doppler Particle Analysis (PDPA)'

Author: Grafiati

Published: 1 March 2025

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Journal articles on the topic "Phase Doppler Particle Analysis (PDPA)"

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Lee, Seong W., Hu J. Cui, and Yan H. Huang. "Particle Characteristics and Analysis Using the Laser-Based Phase Doppler Particle Analyzer (PDPA) and Statistical Method." Particulate Science and Technology 27, no. 3 (2009): 263–70. http://dx.doi.org/10.1080/02726350902922002.

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Lee, Seong W., Hu J. Cui, and Yan H. Huang. "Particle Characteristics and Analysis Using a Laser-Based Phase Doppler Particle Analyzer (PDPA) and Statistical Method." Particulate Science and Technology 27, no. 6 (2009): 553–61. http://dx.doi.org/10.1080/02726350903328845.

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Tolpadi, A. K., D. L. Burrus, and R. J. Lawson. "Numerical Computation and Validation of Two-Phase Flow Downstream of a Gas Turbine Combustor Dome Swirl Cup." Journal of Engineering for Gas Turbines and Power 117, no. 4 (1995): 704–12. http://dx.doi.org/10.1115/1.2815456.

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The two-phase axisymmetric flow field downstream of the swirl cup of an advanced gas turbine combustor is studied numerically and validated against experimental Phase-Doppler Particle Analyzer (PDPA) data. The swirl cup analyzed is that of a single annular GE/SNECMA CFM56 turbofan engine that is comprised of a pair of coaxial counterswirling air streams together with a fuel atomizer. The atomized fuel mixes with the swirling air stream, resulting in the establishment of a complex two-phase flow field within the swirl chamber. The analysis procedure involves the solution of the gas phase equati

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Privitera, Salvatore, Emanuele Cerruto, Giuseppe Manetto, et al. "Comparison between Liquid Immersion, Laser Diffraction, PDPA, and Shadowgraphy in Assessing Droplet Size from Agricultural Nozzles." Agriculture 14, no. 7 (2024): 1191. http://dx.doi.org/10.3390/agriculture14071191.

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Spray droplet diameters play a key role in the field of liquid plant protection product (PPP) application technology. However, the availability of various measurement techniques, each with its unique operating principles for evaluating droplet size spectra, can lead to different interpretations of spray characteristics. Therefore, in this study, four measurement techniques—Liquid Immersion (LI), Laser Diffraction (LD), Phase Doppler Particle Analysis (PDPA), and Shadowgraphy (SG)—were utilized to evaluate the droplet size distribution of agricultural spray nozzles. Additionally, PDPA and SG we

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Shum, Sam C. K., Steve K. Johnson, Ho-Ming Pang, and R. S. Houk. "Spatially Resolved Measurements of Size and Velocity Distributions of Aerosol Droplets from a Direct Injection Nebulizer." Applied Spectroscopy 47, no. 5 (1993): 575–83. http://dx.doi.org/10.1366/0003702934067108.

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Aerosol droplet sizes and velocities from a direct injection nebulizer (DIN) are measured with radial and axial spatial resolution by phase Doppler particle analysis (PDPA). The droplets on the central axis of the spray become finer and their size becomes more uniform when ≍ 20% methanol is added to the usual aqueous solvent. This could explain why the analyte signal is a maximum at this solvent composition when the DIN is used for inductively coupled plasma-mass spectrometry (ICP-MS). Mean droplet velocities are 12 to 22 ms−1 with standard deviations of ±4 to ±7 ms−1. The outer fringes of the

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Glahn, A., M. Kurreck, M. Willmann, and S. Wittig. "Feasibility Study on Oil Droplet Flow Investigations Inside Aero Engine Bearing Chambers—PDPA Techniques in Combination With Numerical Approaches." Journal of Engineering for Gas Turbines and Power 118, no. 4 (1996): 749–55. http://dx.doi.org/10.1115/1.2816990.

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The present paper deals with oil droplet flow phenomena in aero engine bearing chambers. An experimental investigation of droplet sizes and velocities utilizing a Phase Doppler Particle Analyzer (PDPA) has been performed for the first time in bearing chamber atmospheres under real engine conditions. Influences of high rotational speeds are discussed for individual droplet size classes. Although this is an important contribution to a better understanding of the droplet flow impact on secondary air/oil system performance, an analysis of the droplet flow behavior requires an incorporation of nume

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Zheng, Lei, Haizhou Xu, Hao Fu, Hua Chen, and Wenlong Cheng. "Experiment and simulation study on the characteristics of pressure swirl nozzle flash spray under the influence of superheat." Journal of Physics: Conference Series 2683, no. 1 (2024): 012036. http://dx.doi.org/10.1088/1742-6596/2683/1/012036.

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Abstract The good atomization performance of the pressure swirl nozzle makes it widely used in the fuel injection device of the internal combustion engine. Flash spray caused by fuel inlet superheat can affect spray and combustion characteristics. In this paper, a spray parameter measurement system is set up, combined with phase Doppler particle analysis (PDPA) technology to research the effect of superheat on spray velocity and droplet diameter distribution. To improve the safety of the experiment, Methyl Nonafluorobutyl Ether (HFE7100) with a boiling point of 61°C was used as the spray fluid

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Xu, Li. "Experimental Investigation on Atomization Characteristics of a Certain Type of Aero Engine Fuel Nozzle." Advanced Materials Research 354-355 (October 2011): 468–71. http://dx.doi.org/10.4028/www.scientific.net/amr.354-355.468.

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The atomization characteristics of a certain type of aero engine fuel nozzle are discussed in this paper. The nozzle atomization characteristics have great influence on the combustion efficiency, ignition, outlet temperature field and pollution emissions. The flow characteristics, atomization particle size and distribution under different working conditions are obtained in this paper through the Phase Doppler particle analyzer and laser Doppler velocity system (PDPA / LDV). The test results show that to the dual pressure atomization nozzle, the flow rate range is wide and droplets size decreas

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Wei, Xianggeng, Yiming Feng, Jinying Ye, Na Li, and Oskar J. Haidn. "Influence of Mass Flow Rate on the Atomization Characteristics of Screw Conveyor Swirl Injectors." Aerospace 9, no. 6 (2022): 293. http://dx.doi.org/10.3390/aerospace9060293.

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This study conducted cold flow experimental research on the influence of mass flow rate on the atomization characteristics of screw conveyer swirl injectors in an opening environment. The Phase Doppler Particle Analyzer (PDPA) and high-speed photography were utilized to obtain experimental data. The results showed that the mass flow rate greatly influenced the atomization establishment and working characteristics of the injectors. The design point selection of the injectors exerted significant influence on the flow range and the performances of the injectors in a steady-state operation. The Sa

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Bae, Ho Seuk, Won-Ki Kim, Su-Uk Son, Woo-Shik Kim, and Joung-Soo Park. "An Estimation of the Backscattering Strength of Artificial Bubbles Using an Acoustic Doppler Current Profiler." Sensors 22, no. 5 (2022): 1812. http://dx.doi.org/10.3390/s22051812.

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Acoustic Doppler current profilers (ADCPs) were developed to acquire water current velocities, as well as depth-dependent echo intensities. As the backscattering strength of an underwater object can be estimated from the measured echo intensity, the ADCP can be used to estimate plankton populations and distributions. In this study, the backscattering strength of bubble clusters in a water tank was estimated using the commercial ADCP as a proof-of-concept. Specifically, the temporal variations in the backscattering strength and the duration of bubble existence were quantitatively evaluated. Add

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Dissertations / Theses on the topic "Phase Doppler Particle Analysis (PDPA)"

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Vince, Maxence. "Analyses in situ et approche paramétrique du procédé Spray Flash Evaporation pour l’élaboration d’hexolites." Electronic Thesis or Diss., Strasbourg, 2024. http://www.theses.fr/2024STRAE018.

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Les nanodiamants (NDs) font l'objet de recherches intenses dans les domaines biomédical, militaire et de la mécanique quantique. Pour produire ces NDs, le recours à la détonation d'un mélange RDX/TNT, aussi appelé hexolite, est souvent préféré. Cependant, pour produire des NDs aux propriétés physico-chimiques performantes, il est nécessaire d’avoir au préalable des particules fines d’hexolites, et des mélanges intimes et homogènes. Pour parvenir à cela, le laboratoire NS3E a développé le procédé de recristallisation par évaporation flash de spray (Spray Flash Evaporation, SFE). Cependant, l'in

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FLOHRE, NICHOLAS MATTHEW. "EXPERIMENTAL INVESTIGATION OF SPRAY ATOMIZATION PROPERTIES OF AN AIRCRAFT ENGINE SWIRL CUP." University of Cincinnati / OhioLINK, 2003. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1054322000.

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Bultynck, Hervé. "Développements de sondes laser Doppler miniatures pour la mesure de particules dans des écoulements réels complexes." Rouen, 1998. http://www.theses.fr/1998ROUES031.

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Le diagnostic par des méthodes optiques basées sur l'anémométrie Doppler laser ou phase Doppler permet une meilleure connaissance des écoulements diphasiques. Cependant, l'encombrement de tels systèmes optiques limite leur utilisation. Grâce à la théorie de Lorenz-Mie généralisée, la dimension finie des faisceaux peut être prise en compte, ainsi, deux sondes laser Doppler miniatures ont pu être réalisées. Le développement d'une sonde phase Doppler miniature en rétrodiffusion est au centre de la première partie de cette thèse. L'originalité d'une telle sonde réside dans l'utilisation d'une seul

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Onofri, Fabrice. "Prise en compte de la dimension finie des faisceaux d'éclairage en granulométrie optique : anémométrie phase Doppler. diagnostics des milieux diphasiques." Phd thesis, Université de Rouen, 1995. http://tel.archives-ouvertes.fr/tel-00287923.

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Le diagnostic par une méthode optique telle que l'anémométrie phase Doppler, des particules présentes dans les milieux diphasiques, nécessite l'emploi de faisceaux laser focalisés. La compréhension et l'élimination des effets engendrés sur les mesures de taille, par les gradients d'éclairage ou les « effets de trajectoire », est au centre de la première partie de cette thèse. Différentes solutions, testées numériquement et expérimentalement, sont proposées pour éliminer les biais constatés. L'extension de l'anémométrie phase Doppler à la mesure de la partie réelle et complexe (absorption) de l

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Onofri, Fabrice. "Prise en compte de la dimension finie des faisceaux d'éclairage en granulométrie optique : anémométrie phase Doppler. diagnostics des milieux diphasiques." Phd thesis, Rouen, 1995. https://tel.archives-ouvertes.fr/tel-00287923.

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Le diagnostic par une méthode optique telle que l'anémométrie phase Doppler des particules présentes dans les milieux diphasiques, nécessite l'emploi de faisceaux laser focalisés. La compréhension et l'élimination des effets engendrés par les gradients d'éclairage ou effets de trajectoire sur la mesure de la taille des particules sphériques est au centre de la première partie de cette thèse. Différentes solutions, testées numériquement et expérimentalement, sont proposées pour éliminer les biais constatés. L'extension de l'anémométrie phase Doppler à la mesure de la partie réelle et complexe (

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Books on the topic "Phase Doppler Particle Analysis (PDPA)"

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United States. National Aeronautics and Space Administration., ed. Analysis of counting errors in the Phase/Doppler particle analyzer. National Aeronautics and Space Administration, 1987.

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Book chapters on the topic "Phase Doppler Particle Analysis (PDPA)"

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Bachalo, W. D. "The Phase Doppler Method: Analysis and Application." In Optical Particle Sizing. Springer US, 1988. http://dx.doi.org/10.1007/978-1-4757-1983-3_23.

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Conference papers on the topic "Phase Doppler Particle Analysis (PDPA)"

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Lee, Jin-Woo, Kuk Jin Jung, Morely Sherman, Hyun Sin Kim, and Youn-Jea Kim. "Experimental and Numerical Analysis on the Performance of Spiral Two-Fluid Atomizer Using DPM Method." In ASME 2020 Fluids Engineering Division Summer Meeting collocated with the ASME 2020 Heat Transfer Summer Conference and the ASME 2020 18th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/fedsm2020-20350.

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Abstract A two-fluid atomizer has been frequently used in a wide range of industries for various purposes such as painting, cleaning particles and snow making. In particular, the manufacturing of advance semiconductors using sensitive devices such as organic light emitting diodes (OLED) and dynamic random access memory (DRAM), require high performance nozzle. The droplets sprayed with a high relative gas velocity are widely used for cleaning particles. In this paper, two-fluid atomizer is numerically studied according to four variables to confirm the effect on the atomizer performance. The num

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Sasao, Yasuhiro, Ryo Takata, Satoshi Miyake, Soichiro Tabata, and Satoru Yamamoto. "Optical Coarse Droplet Measurement and Wet Loss Analysis on the Wet Air Flow Through the Subsonic Blade Cascade Channel." In ASME Turbo Expo 2019: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/gt2019-91928.

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Abstract In order to understand the details of the mechanism of the occurrence of wetness loss between blade rows, the blades of an HP nuclear turbine were modeled in an atmospheric subsonic wind tunnel, and a flow field with wet loss was analyzed in its totality using a three-hole Pitot tube and Phase Doppler Particle Analyzer (PDPA) system. In the secondary flow loss region and the end wall loss region, a significant increase in pressure loss was confirmed under wet conditions. Analysis by measurement and the Eulerian-Lagrangian coupled solver showed that these loss increases can occur due t

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Glahn, A., M. Kurreck, M. Willmann, and S. Wittig. "Feasibility Study on Oil Droplet Flow Investigations Inside Aero Engine Bearing Chambers: PDPA Techniques in Combination With Numerical Approaches." In ASME 1995 International Gas Turbine and Aeroengine Congress and Exposition. American Society of Mechanical Engineers, 1995. http://dx.doi.org/10.1115/95-gt-100.

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The present paper deals with oil droplet now phenomena in aero engine bearing chambers. An experimental investigation of droplet sizes and velocities utilizing a Phase Doppler Particle Analyzer (PDPA) has been performed for the first time in bearing chamber atmospheres under real engine conditions. Influences of high rotational speeds are discussed for individual droplet size classes. Although this is an important contribution to a better understanding of the droplet flow impact on secondary air/oil system performance, an analysis of the droplet flow behaviour requires an incorporation of nume

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Tolpadi, Anil K., David L. Burrus, and Robert J. Lawson. "Study of Two-Phase Flow Downstream of a Gas Turbine Combustor Dome Swirl Cup." In ASME 1993 International Gas Turbine and Aeroengine Congress and Exposition. American Society of Mechanical Engineers, 1993. http://dx.doi.org/10.1115/93-gt-392.

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The two-phase axisymmetric flowfield downstream of the swirl cup of an advanced gas turbine combustor is studied numerically. The swirl cup analyzed is that of a single annular GE/SNECMA CFM56 turbofan engine that is comprised of a pair of coaxial counter-swirling air streams together with a fuel atomizer. The atomized fuel mixes with the swirling air stream resulting in the establishment of a complex two-phase flowfield within the swirl chamber. The analysis procedure involves the solution of the gas phase equations in a Eulerian frame of reference. The flow is assumed to be nonreacting and i

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Levy, Y., V. Erenburg, V. Sherbaum, V. Ovcharenko, and A. Roizman. "The Use of Methanol as an Alternative Fuel: Droplet Formation and Evaporation." In ASME Turbo Expo 2015: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/gt2015-42965.

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Methanol, produced from natural may be considered as an alternative fuel for fossil based liquid fueled gas turbines, especially for land based systems. In the present work, the effect of physical properties of methanol and kerosene on atomization and evaporation are compared. The spray’s liquid flux, droplet sizes and droplet velocities, cone angle were measured using Phase Doppler Particle Analyzer/Laser Doppler Velocimeter (TSI PDPA/LDV) system. Water, kerosene and ethanol (ethanol instead of methanol was used due to the toxicity of methanol) were used and tested at the same input liquid pr

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Gupta, Abhishek Kumar, Keshav Yadav, Surendra Kumar Soni, Yogeshwar Nath Mishra, and Santanu De. "Effects of the Swirl Field on the Structure, Planner Drop Sizing and Large-Scale Instabilities of Flow-Blurring Spray." In ASME 2023 Gas Turbine India Conference. American Society of Mechanical Engineers, 2023. http://dx.doi.org/10.1115/gtindia2023-118555.

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Abstract Effective atomisation is a governing parameter in a liquid-based gas turbine. Incorporating the swirling air with the spray influences the spray structure, drop dispersion, and large-scale unsteadiness. Therefore, reliable measurement of drop sizes, spray structure, and large-scale instabilities are necessary for the detailed analysis of the complex interaction of the spray droplets in the swirl airfield. We aim to investigate the spray structure, drop sizing, and large-scale unsteadiness of a flow-blurring (FB) spray under swirl airfield conditions. In previous studies, the drop size

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Schnitzler, J. P., I. von Deschwanden, S. Clauss, F. K. Benra, H. J. Dohmen, and K. Werner. "Experimental Determination of a Four Stage Axial Compressor Map Operating in Wet Compression." In ASME Turbo Expo 2014: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/gt2014-26807.

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Injecting water in the air upstream of an axial compressor intake is an effective method to increase the efficiency and the power output of a gas turbine application especially at hot days. Reasoned by their complex two phase flow axial compressors which operate in wet compression mode are in the focus of present thermodynamic analysis, numerical investigations and experimental research. Recently the evaporation process of water droplets, especially at high temperature and pressure levels has been investigated with the laser based measurement technique Phase Doppler Particle Analyzer (PDPA) in

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Clauss, S., J. P. Schnitzler, B. Barabas, P. S. Nagabhushan, F. K. Benra, and H. J. Dohmen. "Test Rig Design to Explore Water Droplet Behavior in a Four Stage Axial Compressor." In ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-63429.

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The efficiency of gas turbine cycles can be enhanced by many applications and combinations according to the choice of the thermodynamic cycle. Gas turbine cycles which operate with humid air and water injection at different locations of the compressor are in the focus of present thermodynamic analysis and experimental research. Reasoned by their high potential in efficiency and power output augmentation, they have been implemented on many industrial gas turbines. The evaporation process of water droplets, especially at high temperature and pressure levels has been recently investigated with th

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Chaine, G., and D. E. Nikitopoulos. "Multiphase Digital Particle Image Velocimetry in a Dispersed, Bubbly, Axisymmetric Jet." In ASME 2002 Joint U.S.-European Fluids Engineering Division Conference. ASMEDC, 2002. http://dx.doi.org/10.1115/fedsm2002-31435.

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A particle image velocimetry (PIV) technique developed for application to two-phase flows is presented and validated. The technique is capable of simultaneously measuring carrier and bubble phase velocities on a plane. The validation experiments have been conducted in a vertical upwards, two-phase (water-air) bubbly jet flow at a Reynolds numbers of 5,673 and 11,345 and low bubble concentration matching the experiments of Stanley and Nikitopoulos (1998). Comparisons with measurements obtained by Stanley and Nikitopoulos (1998) using Phase Doppler Analysis (PDA) experiments indicate that the ag

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Wang, Ting, and Lei Zhao. "Development of an Experimental Test Facility for Investigating Mist/Air Film Cooling Application in Gas Turbine Airfoils." In ASME Turbo Expo 2013: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/gt2013-94476.

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Film cooling is a cooling technique widely used in high-performance gas turbines to protect the turbine airfoils from being damaged by hot flue gases. Motivated by the need to further improve the turbine hot section cooling performance, a new cooling scheme, mist/air film cooling is investigated. A small amount of tiny water droplets with an average diameter about 7 μm (mist) is injected into the cooling air to enhance the cooling performance. One key feature in understanding mist cooling is the ability to capture droplet information. This paper presents the experimental facility and instrumen

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Reports on the topic "Phase Doppler Particle Analysis (PDPA)"

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Edwards, C. F., and K. D. Marx. Analysis of the ideal phase-Doppler System: Limitations imposed by the single-particle constraint. Office of Scientific and Technical Information (OSTI), 1991. http://dx.doi.org/10.2172/6168463.

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Svedeman. L51729 Gas Scrubber Performance Evaluation - Measurement Methods. Pipeline Research Council International, Inc. (PRCI), 1995. http://dx.doi.org/10.55274/r0010420.

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Scrubbers and separators are used in natural gas pipelines to remove solid and liquid materials from the gas stream. Failure to remove the entrained materials from the gas can result in equipment damage, increased pressure drop due to liquid accumulation, flow measurement errors, and corrosion. The performance of separators is rarely tested after a separator is installed because there is a lack of test instrumentation and it is difficult to conduct tests at the high pressures. The only indicators of poor separator performance are recurring problems in downstream equipment or the detection of a

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