超声速气流中凹腔对液体射流穿透深度的影响
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摘要
采用高速摄影对凹腔上游液体垂直射入超声速气流中的穿透深度展开了试验研究。进行了不同喷注位置和液气动量通量比条件下,平板射流和带凹腔射流的试验,研究了凹腔对射流穿透深度的影响。试验发现,射流穿透深度在凹腔前缘降低,射流边界曲线向凹腔内弯曲;射流穿透深度在凹腔后缘增大。凹腔对射流液雾的卷吸作用使穿透深度降低,剪切层撞击凹腔后缘形成的高压波传递使得穿透深度在后缘增大。减小液气动量通量比是增大凹腔对射流卷吸作用的途径之一。喷注在凹腔上游3倍凹腔深度的距离上,凹腔对穿透深度降低最大。
An experimental investigation on the penetration of cavity upstream liquid jet was conducted with high speed camera.Experiments of plate jet and cavity jet were performed on the different conditions of jet positions and momentum flux ratios to investigate the influence of the cavity on the jet penetration.Results indicated that the jet penetration decreased at the inlet of the cavity and the jet boundary bent to the cavity because of the entrainment of the cavity.Jet penetration increased at the outlet of the cavity due to the shear layer impinging the cavity outlet edge,forming a high pressure field.The decrease of momentum flux ratio led to a strong cavity enterainment.The penetration decreased to the lowest at the cavity front edge when the jet position was 3D(where Dis the cavity depth).
An experimental investigation on the penetration of cavity upstream liquid jet was conducted with high speed camera.Experiments of plate jet and cavity jet were performed on the different conditions of jet positions and momentum flux ratios to investigate the influence of the cavity on the jet penetration.Results indicated that the jet penetration decreased at the inlet of the cavity and the jet boundary bent to the cavity because of the entrainment of the cavity.Jet penetration increased at the outlet of the cavity due to the shear layer impinging the cavity outlet edge,forming a high pressure field.The decrease of momentum flux ratio led to a strong cavity enterainment.The penetration decreased to the lowest at the cavity front edge when the jet position was 3D(where Dis the cavity depth).
引文
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[16]王延胜,林宇震,李林,等.基于PLIF技术的航空煤油横向射流穿透深度研究[J].推进技术,2015,36(9):1395-1402.WANG Yansheng,LIN Yuzhen,LI Lin,et al.Research on penetration of aviation kerosene injected into crossflows based on PLIF technique[J].Journal of Propulsion Technology,2015,36(9):1395-1402.(in Chinese)
[17]仝毅恒,李清廉,吴里银,等.超声速气流中液体横向射流组合喷注特性实验[J].国防科技大学学报,2014,36(2):73-80.TONG Yiheng,LI Qinglain,WU Liyin,et al.Experimental investigation on injection characteristics of assembled transverse injectors in supersonic crossflow[J].Journal of National University of Defense Technology,2014,36(2):73-80.(in Chinese)
[18]WANG Zhenguo,WU Liyin,LI Qinglian,et al.Experimental investigation on structures and velocity of liquid jets in a supersonic crossflow[J].Applied Physics Letters,2014,105(13):2674-2686.
[19]CHAOUKI G,SAPMAZ H,LIN Chengxian.Penetration height correlations for non-aerated and aerated transverse liquid jets in supersonic cross flow[J].Experiments in Fluids,2009,46(1):121-129.
[20]耿辉,周进,翟振辰,等.凹腔结构对超声速燃烧室中横向燃料喷流流动与燃烧的影响[J].推进技术,2007,28(6):599-606.GENG Hui,ZHOU Jin,ZHAI Zhenchen,et al.Influence of cavity geometry on flow and combustion of transverse fuel jets in a supersonic combustor[J].Journal of Propulsion Technology,2007,28(6):599-606.(in Chinese)
[21]WU L,WANG Z,LI Q,et al.Investigations on the droplet distributions in the atomization of kerosene jets in supersonic crossflows[J].Applied Physics Letters,2015,107(10):458-459.
[2]林宇震,李林,张弛,等.液体射流喷入横向气流混合特性研究进展[J].航空学报,2014,35(1):46-57.LIN Yuzhen,LI Lin,ZHANG Chi,et al.Progress on the mixing of liquid jet injected into a crossflow[J].Acta Aeronautica et Astronautica Sinica,2014,35(1):46-57.(in Chinese)
[3]BARNES F W,SEGAL C.Cavity-based flameholding for chemically-reacting supersonic flows[J].Progress in Aerospace Sciences,2015,76:24-41.
[4]HSU K Y,CARTER C,CRAFTON J.Fuel distribution about a cavity flameholder in supersonic flow[R].AIAA-2000-3585,2000.
[5]LEE S H,KIM Y J.Mixing augmentation of transverse injection in scramjet combustor[J].Journal of Propulsion and Power,2000,19(1):115-124.
[6]YU K H,SCHADOW K C.Role of large coherent structures in turbulent compressible mixing[J].Experimental Thermal and Fluid Science,1997,14(2):78-84.
[7]LIN K C,TAM C J,BOXX I,et al.Flame characteristics and fuel entrainment inside a cavity flame holder in a scramjet combustor[R].AIAA-2007-5381,2007.
[8]UKAI T,ZARE-BEHTASH H,ERDEM E,et al.Effectiveness of jet location on mixing characteristics inside a cavity in supersonic flow[J].Experimental Thermal and Fluid Science,2014,52:59-67.
[9]孙明波,耿辉,梁剑寒,等.超声速来流稳焰凹腔上游气体燃料横向喷注的流动混合特征[J].推进技术,2008,29(3):306-311.SUN Mingbo,GENG Hui,LIANG Jianhan,et al.Mixing characteristics of gaseous fuel injection upstream of a flameholding cavity in supersonic flow[J].Journal of Propulsion Technology,2008,29(3):306-311.(in Chinese)
[10]UKAI T,ZARE-BEHTASH H,LO K H,et al.Effects of dual jets distance on mixing characteristics and flow path within a cavity in supersonic crossflow[J].International Journal of Heat and Fluid Flow,2014,50:254-262.
[11]包恒,周进,潘余.凹腔几何构型和来流马赫数对部分覆盖型凹腔流动的影响[J].推进技术,2014,35(1):1-7.BAO Heng,ZHOU Jin,PAN Yu.Effects of geometric parameters and incoming flow Ma on flow characteristics of partly-covered cavities[J].Journal of Propulsion Technology,2014,35(1):1-7.(in Chinese)
[12]孙海俊,曾卓雄,徐义华,等.横向射流对凹腔湍流特性影响的数值模拟[J].推进技术,2014,35(1):54-61.SUN Haijun,ZENG Zhuoxiong,XU Yihua,et al.Numerical simulation of transverse injection on turbulence characteristics in cavity[J].Journal of Propulsion Technology,2014,35(1):54-61.(in Chinese)
[13]MILLIGAN R T.Dual mode scramjet:a computational investigation on combustor design and operation[D].Dayton,US:Wright State University,2009.
[14]费立森.煤油在冷态超声速气流中喷射和雾化现象的初步研究[D].合肥:中国科学技术大学,2007.FEI Lisen.Preliminary study on spray and atomization of kerosene in cold supersonic flow[D].Hefei:University of Science and Technology of China,2007.(in Chinese)
[15]李长亮,陈立红,顾洪斌,等.超声速气流中液体喷射穿透深度的研究[C]∥第十四届全国激波与激波管学术会议论文集:上册.安徽黄山:中国力学学会,2010:100-102.
[16]王延胜,林宇震,李林,等.基于PLIF技术的航空煤油横向射流穿透深度研究[J].推进技术,2015,36(9):1395-1402.WANG Yansheng,LIN Yuzhen,LI Lin,et al.Research on penetration of aviation kerosene injected into crossflows based on PLIF technique[J].Journal of Propulsion Technology,2015,36(9):1395-1402.(in Chinese)
[17]仝毅恒,李清廉,吴里银,等.超声速气流中液体横向射流组合喷注特性实验[J].国防科技大学学报,2014,36(2):73-80.TONG Yiheng,LI Qinglain,WU Liyin,et al.Experimental investigation on injection characteristics of assembled transverse injectors in supersonic crossflow[J].Journal of National University of Defense Technology,2014,36(2):73-80.(in Chinese)
[18]WANG Zhenguo,WU Liyin,LI Qinglian,et al.Experimental investigation on structures and velocity of liquid jets in a supersonic crossflow[J].Applied Physics Letters,2014,105(13):2674-2686.
[19]CHAOUKI G,SAPMAZ H,LIN Chengxian.Penetration height correlations for non-aerated and aerated transverse liquid jets in supersonic cross flow[J].Experiments in Fluids,2009,46(1):121-129.
[20]耿辉,周进,翟振辰,等.凹腔结构对超声速燃烧室中横向燃料喷流流动与燃烧的影响[J].推进技术,2007,28(6):599-606.GENG Hui,ZHOU Jin,ZHAI Zhenchen,et al.Influence of cavity geometry on flow and combustion of transverse fuel jets in a supersonic combustor[J].Journal of Propulsion Technology,2007,28(6):599-606.(in Chinese)
[21]WU L,WANG Z,LI Q,et al.Investigations on the droplet distributions in the atomization of kerosene jets in supersonic crossflows[J].Applied Physics Letters,2015,107(10):458-459.