双预膜式Hartmann哨超声波喷嘴设计及特性实验研究
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摘要
为了满足先进航空发动机燃烧系统对燃油雾化质量的要求,设计了一种双预膜式Hartmann哨超声波喷嘴,采用激光粒度分析仪和高速相机对其进行了实验研究,得到了其流量特性和雾化特性。研究结果表明:在满足流量要求下,索太尔平均直径SMD为4.2μm～9μm,气液比ALR为0.27～0.54,液滴尺寸分布集中,均匀性好;在测量范围内,SMD基本不受测量位置到喷嘴出口距离的影响;油压和共振腔到喷嘴出口距离是影响SMD大小的主要因素;雾化角度随油压的变化较小;共振腔到喷嘴出口距离是影响雾化角度的主要因素,雾化角度为135°～180°。
In order to meet the requirements of advanced aero-engine combustor for fuel atomization quali-ty,a dual pre-filmed Hartmann whistle ultrasonic nozzle was designed. The characteristics of fuel flow and atom-ization were studied experimentally using a laser particle size analyzer and a high-speed camera. The resultsshow that the droplet size is uniform with a narrow distribution of its Sauter mean diameter(SMD)variation from4.2μm to 9μm,and the air-liquid ratio(ALR)of the nozzle is low and varies from 0.27 to 0.54 under the precon-dition to meet the nozzle mass flow rate. Within the test operating conditions,SMD is basically not affected bythe distance from measurement location to nozzle outlet,while it is affected mainly by fuel pressure and the dis-tance from resonator to nozzle outlet. The atomization angle varies from 135° to 180° and it changes little with fuelpressure,while it is affected mainly by the distance from resonator to nozzle outlet.
In order to meet the requirements of advanced aero-engine combustor for fuel atomization quali-ty,a dual pre-filmed Hartmann whistle ultrasonic nozzle was designed. The characteristics of fuel flow and atom-ization were studied experimentally using a laser particle size analyzer and a high-speed camera. The resultsshow that the droplet size is uniform with a narrow distribution of its Sauter mean diameter(SMD)variation from4.2μm to 9μm,and the air-liquid ratio(ALR)of the nozzle is low and varies from 0.27 to 0.54 under the precon-dition to meet the nozzle mass flow rate. Within the test operating conditions,SMD is basically not affected bythe distance from measurement location to nozzle outlet,while it is affected mainly by fuel pressure and the dis-tance from resonator to nozzle outlet. The atomization angle varies from 135° to 180° and it changes little with fuelpressure,while it is affected mainly by the distance from resonator to nozzle outlet.
引文
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[14]金义,何小民,吴泽俊,等.超声波/离心组合喷嘴性能研究[J].航空动力学报,2012,27(2):335-342.
[15]武郁文,韩启祥,杨光远,等.预膜式杆射哨超声波喷嘴雾化特性研究[J].推进技术,2016,37(6):1123-1128.(WU Yu-wen,HAN Qi-xiang,YANG Guang-yuan,et al. Investigation of Atomization Characteristics of a Pre-Filmed Ultrasonic Nozzle with Central Rod[J]. Journal of Propulsion Technology,2016,37(6):1123-1128.)
[16]杨光远.气动阀式PDE推力性能分析与实验研究[D].南京:南京航空航天大学,2017.
[17] Domann R,Hardalupas Y. Quantitative Measurement of Planar Droplet Sauter Mean Diameter in Sprays Using Planar Droplet Sizing[J]. Particle&Particle Systems Characterization,2003,20(3):209-218.
[18] Rizkalla A A,Lefebvre A H. The Influence of Air and Liquid Properties on Airblast Atomization[J]. Journal of Fluids Engineering,1975,97(3):316-320.
[2] Al-Jumaily A M,Meshkinzar A. On the Development of Focused Ultrasound Liquid Atomizers[J]. Advances in Acoustics and Vibration,2017,(2):1-10.
[3] Ju J,Yamagata Y,Ohmori H,et al. High-Frequency Surface Acoustic Wave Atomizer[J]. Sensors and Actuators A:Physical,2008,145:437-441.
[4] Gonda K,Kadota K,Deki Y,et al. Fabrication of Composite Particles by Liquid–Liquid Interfacial Crystallization Using an Ultrasonic Spray Nozzle[J]. Powder Technology,2015,269:401-408.
[5] Choi H W,Um S H,Rhee S H. Preparation of Fluoride-Loaded Microcapsules for Anticariogenic Bacterial Growth Using a Coaxial Ultrasonic Atomizer[J]. Journal of Biomedical Materials Research Part B:Applied Biomaterials,2018,106(1):31-39.
[6]孙晓霞.超声波雾化喷嘴的研究进展[J].工业炉,2004,26(1):19-23.
[7]张绍坤,王景甫,马重芳,等.流体动力式超声波喷嘴雾化特性的实验研究[J].石油机械,2007,35(6):1-3.
[8]张绍坤,王景甫,马重芳,等.流体动力式超声波喷嘴雾化特性的研究[J].冶金设备,2007,(s1):13-16.
[9]王建勋.流体动力式超声波燃油燃烧器的雾化特性研究[D].北京:北京工业大学,2010.
[10]БорисовЮЯ,ГининВН,ГынкинаНМ.РазработкаиИсследованиеСтержневогоГазостру-йногоИзлучателяГСИ-4[J].АкустическийЖурнал,1965,11(2).
[11]陈全英,颜世彪.杆射哨超声雾化燃烧器的实验研究[J].应用声学,1990,9(5):37-41.
[12] Swamy K M,Narayana K L,Murty J S. Atomization of Liquid Fuels in an Acoustic Burner[J]. Fuel,1989,68(3):387-390.
[13] Narayanan S,Srinivasan K,Sundararajan T. Atomization in the Acoustic Field of a Hartmann Whistle[J]. International Journal of Spray and Combustion Dynamics,2013,5(1):1-24.
[14]金义,何小民,吴泽俊,等.超声波/离心组合喷嘴性能研究[J].航空动力学报,2012,27(2):335-342.
[15]武郁文,韩启祥,杨光远,等.预膜式杆射哨超声波喷嘴雾化特性研究[J].推进技术,2016,37(6):1123-1128.(WU Yu-wen,HAN Qi-xiang,YANG Guang-yuan,et al. Investigation of Atomization Characteristics of a Pre-Filmed Ultrasonic Nozzle with Central Rod[J]. Journal of Propulsion Technology,2016,37(6):1123-1128.)
[16]杨光远.气动阀式PDE推力性能分析与实验研究[D].南京:南京航空航天大学,2017.
[17] Domann R,Hardalupas Y. Quantitative Measurement of Planar Droplet Sauter Mean Diameter in Sprays Using Planar Droplet Sizing[J]. Particle&Particle Systems Characterization,2003,20(3):209-218.
[18] Rizkalla A A,Lefebvre A H. The Influence of Air and Liquid Properties on Airblast Atomization[J]. Journal of Fluids Engineering,1975,97(3):316-320.