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Research on Performance of Pulsed Twin-Fluid Injector and Its Application on a Spark Ignition UAV Engine
Technical Paper
2021-01-0651
ISSN: 0148-7191, e-ISSN: 2688-3627
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SAE WCX Digital Summit
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English
Abstract
The principal objective of the present work is to investigate the fundamental characteristics of a commercially available outwardly opening twin-fluid injector, which utilizes air-assisted atomization principle to attain pulse-type injection of fuel-air mixture. The electromagnetic characteristics of this injector were simulated and the effects of dominating parameters on the electromagnetic force to drive injector were ascertained. On that basis, this paper elaborates on the fundamental characteristics of air-assisted spray using gasoline and kerosene with the employment of two types of optical testing techniques. The spray morphological evolution under varied fuel injection durations and ambient pressures were captured with high-speed shadowgraph thus the corresponding external macroscopic characteristics were obtained and further compared. Spray droplet velocity and diameter at fixed monitoring location were measured by using PDPA (Phase Doppler Particle Analyzer). The results indicate that the gas-phase flow in the spray field possesses a comparatively high velocity, which makes the spray highly turbulent with the calculated Reynolds number ranging in the order of 104-105. The arithmetic mean diameter of spray droplets was found to increase as the injection duration increases, and also increase as the ambient pressure increases. Due to the negative impact of relatively high fluid viscosity on liquid disintegration, the diameters of kerosene spray droplets are generally larger than that of gasoline under the same working conditions. The twin-fluid injector was applied to an unmanned aerial vehicle engine prototype and the combustion and engine performances of gasoline and kerosene were compared. Under the premise of ensuring stable operation of the engine, it was found that the combustion of kerosene lagged behind gasoline apparently, and the power performance was also inferior to gasoline.
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Wu, H., Zhang, F., Zhang, Z., and Cui, H., "Research on Performance of Pulsed Twin-Fluid Injector and Its Application on a Spark Ignition UAV Engine," SAE Technical Paper 2021-01-0651, 2021, https://doi.org/10.4271/2021-01-0651.Data Sets - Support Documents
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References
- Arai , M. The Possibility of Active Attitude Control for Fuel Spray Engineering 5 3 519 534 2019 https://doi.org/10.1016/j.eng.2019.04.010
- Wu , H. , Zhang , F. , Zhang , Z. , Guo , Z. et al. On the Role of Vortex-Ring Formation in Influencing Air-Assisted Spray Characteristics of N-heptane Fuel 266 117044 2020 https://doi.org/10.1016/j.fuel.2020.117044
- Saha , A. , Joshua , D. , Saptarshi , B. , and Ranganathan , K. Breakup and Coalescence Characteristics of a Hollow cone Swirling Spray Physics of Fluids 24 12 124103 2012 https://doi.org/10.1063/1.4773065
- Zhao , F. , Lai , M. , and Harrington , D. Automotive Spark-Ignited Direct-Injection Gasoline Engines Progress in energy and combustion science 25 5 437 562 1999 https://doi.org/10.1016/S0360-1285(99)00004-0
- Payri , R. , Gimeno , J. , Bracho , G. , and Vaquerizo , D. Study of Liquid and Vapor Phase Behavior on Diesel Sprays for Heavy Duty Engine Nozzles Applied Thermal Engineering 107 365 378 2016 https://doi.org/10.1016/j.applthermaleng.2016.06.159
- Qi , Y. , Wang , B. , and Wang , Z. Impact Resistance of Spark Plug’s Ceramic Insulator during Ultra-High-Pressure Combustion under Deto-Knock Conditions Automotive Innovation 2 2 137 145 2019 https://doi.org/10.1007/s42154-019-00058-0
- Wu , H. , Zhang , F. , Zhang , Z. , and Gao , H. Experimental Investigation on the Spray Characteristics of a Self-Pressurized Hollow Cone Injector Fuel 272 117710 2020 https://doi.org/10.1016/j.fuel.2020.117710
- Epping , K. , Aceves , S. , Bechtold , R. , and Dec , J. The Potential of HCCI Combustion for High Efficiency and Low Emissions SAE Technical Paper 2002-01-1923 2002 10.4271/2002-01-1923
- Hoffmann , G. , Befrui , B. , Berndorfer , A. , Piock , W. et al. Fuel System Pressure Increase for Enhanced Performance of GDi Multi-Hole Injection Systems SAE Technical Paper 2014-01-1209 2014 10.4271/2014-01-1209
- Gao , H. , Zhang , F. , Zhang , Z. , Wang , S. et al. Trajectory Deviation of Target Jet of Air-Assisted Spray under Different Conditions Fuel 249 252 263 2019 https://doi.org/10.1016/j.fuel.2019.03.112
- Houston , R. , Archer , M. , Moore , M. , and Newmann , R. Development of a Durable Emissions Control System or an Automotive Two-Stroke Engine SAE Technical Paper 960361 1996 10.4271/960361
- Houston , R. , and Cathcart , G. Combustion and Emissions Characteristics of Orbital's Combustion Process Applied to Multi-Cylinder Automotive Direct Injected 4-Stroke Engines SAE Technical Paper 980153 1998 10.4271/980153
- Gao , H. , Zhang , F. , Zhang , Z. , Wang , E. et al. Experimental Investigation on the Spray Characteristic of Air-Assisted Hollow-Cone Gasoline Injector Applied Thermal Engineering 151 354 363 2019 https://doi.org/10.1016/j.applthermaleng.2019.02.029
- Cathcart , G. , and Zavier , C. Fundamental Characteristics of an Air-Assisted Direct Injection Combustion System as Applied to 4-Stroke Automotive Gasoline Engines SAE Technical Paper 2000-01-0256 2000 10.4271/2000-01-0256
- Boretti , A. , Jin , S. , Zakis , G. , Brear , M. et al. Experimental and Numerical Study of an Air Assisted Fuel Injector for a D.I.S.I. Engine SAE Technical Paper 2007-01-1415 2007 10.4271/2007-01-1415
- Jin , S. , Michael , B. , Harry , W. , and Simon , B. An Experimental Study of the Spray from an Air-Assisted Direct Fuel Injector Proceedings of the Institution of Mechanical Engineering Part D - Journal of Automobile Engineering 222 10 1883 1894 2008 https://doi.org/10.1243/09544070JAUTO710
- Sureshkumar , J. , Elayaraja , R. , Mallikarjuna , J. , and Venkitachalam , G. Transient Spray Characteristics of Air Assisted Fuel Injection SAE Technical Paper 2015-01-0920 2015 10.4271/2015-01-0920
- Lu , Y. , Pan , J. , Fan , B. , Otchere , P. et al. Research on the Application of Aviation Kerosene in a Direct Injection Rotary Engine-Part 1: Fundamental Spray Characteristics and Optimized Injection Strategies Energy Conversion and Management 195 519 532 2019 https://doi.org/10.1016/J.ENCONMAN.2019.05.042
- Wu , H. , Zhang , F. , Wang , Z. , and Gao , H. Study on Initial Combustion Characteristics of Kerosene Based on Inductive Charging Ignition System Journal of Physics: Conference Series 1303 012036 2019 https://doi.org/10.1088/1742-6596/1303/1/012036
- Wu , H. , Zhang , F. , and Zhang , Z. Fundamental spray Characteristics of Air-assisted Injection System using Aviation Kerosene Fuel 286 119420 2021 https://doi.org/10.1016/j.fuel.2020.119420
- Gao , H. , Zhang , F. , Wang , S. , Wu , H. et al. Effect of Characteristic Parameters on the Magnetic Properties of Voice Coil Motor for Direct Fuel Injection in Gasoline Engine Energy Procedia 158 4184 4189 2019 https://doi.org/10.1016/J.EGYPRO.2019.01.811
- Jones , D. The Theory of Electromagnetism Elsevier 2013 https://doi.org/10.1016/C2013-0-10046-3
- Ferrand , V. , Bazile , R. , Borée , J. , and Charnay , G. Gas-Droplet Turbulent Velocity Correlations and Two-Phase Interaction in an Axisymmetric Jet Laden with Partly Responsive Droplets International Journal of Multiphase Flow 29 2 195 217 2003 https://doi.org/10.1016/S0301-9322(02)00151-9
- Manish , M. , and Sahu , S. Droplet Clustering and Local Spray Unsteadiness in Air-Assisted Sprays Experimental Thermal and Fluid Science 100 89 103 2019 https://doi.org/10.1016/j.expthermflusci.2018.08.026
- Tropea , C. , and Yarin , A. Springer Handbook of Experimental Fluid Mechanics Springer Science & Business Media 2007 https://doi.org/10.1007/978-3-540-30299-5
- Mansouri , H. , and Fatholah , O. Performance Prediction of Aircraft Gasoline Turbocharged Engine at High-Altitudes Applied Thermal Engineering 156 587 596 2019 https://doi.org/10.1016/J.APPLTHERMALENG.2019.04.116
- Zhen , X. , Wang , Y. , Xu , S. et al. The Engine Knock Analysis - An Overview Applied Energy 92 628 636 2012 https://doi.org/10.1016/j.apenergy.2011.11.079
- Cui , H. , Zhao , Z. , Zhang , F. et al. Effect of Pre-chamber Volume on Combustion Characteristics of an SI Aircraft Piston Engine Fueled with RP3 Fuel 119238 286 2021 https://doi.org/10.1016/j.fuel.2020.119238
- Anderson , E. , Attard , W. , Brown , A. , Litke , P. et al. Experimental Study of a Pre-Chamber Jet Igniter in a Turbocharged Rotax 914 Aircraft Engine SAE Technical Paper 2013-01-1629 2013 10.4271/2013-01-1629
- Dagaut , P. , and Cathonnet , M. The Ignition, Oxidation, and Combustion of Kerosene: A Review of Experimental and Kinetic Modeling Progress in Energy and Combustion Science 32 1 48 92 2006 https://doi.org/10.1016/j.pecs.2005.10.003
- Dagaut , P. , Bakali , A. , and Ristori , A. The Combustion of Kerosene: Experimental Results and Kinetic Modelling Using 1- to 3-Component Surrogate Model Fuels Fuel 85 7 944 956 2006 https://doi.org/10.1016/j.fuel.2005.10.008