Experiment of flow field in lobed mixer
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摘要: 为了获得加力燃烧室波瓣混合器内的三维流场,采用带热电偶的五孔探针对波瓣混合器内的流场进行了测量.通过试验,得到了波瓣混合器出口不同截面的速度场和温度场,以及波瓣混合器沿流向的热混合效率、总压恢复系数变化规律.试验结果表明:在波瓣混合器尾缘处会产生一对相互逆转的流向涡,流向涡的产生加强了内、外涵气流的对流混合;越靠近波瓣混合器尾缘,内、外涵掺混能力越强,热混合效率增加速度越快,总压恢复系数下降也越快.Abstract: In order to obtain the three-dimensional flow field of afterburner lobed mixer, a five-hole probe with thermocouple was applied to measure the flow field of the lobed mixer. The velocity and temperature fields in different sections at the lobed mixers outlet were obtained in the experiments, and the change rules of the thermal mixing efficiency and the total pressure recovery coefficient in the flow direction were measured. The experimental results indicate that a pair of inverse direction streamwise vortexes are generated in the trailing edge of lobed mixer, which strengthens the degree of the mixed convection between inner bypass and external bypass. The closer to the trailing edge of the lobed mixer, the greater the mixing degree of the flow between inner bypass and external bypass, the quicker the thermal mixing efficiency increasing, the faster the total pressure recovery coefficient declining.
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[1] 明贵清,何家德,郭明焕,等.波瓣强迫混合器流动规律初步分析[J].燃气涡轮试验与研究,2000,13(3):27-30. [2] 王亚盟,张靖周,高家春,等.加力燃烧室用锯齿冠状混合器混合特性数值研究[J].航空动力学报,2011,26(1):72-77. WANG Yameng,ZHANG Jingzhou,GAO Jiachun,et al.Numerical study on the mixing characteristics of chevron mixers for the afteburner[J].Journal of Aerospace Power,2011,26(1):72-77.(in Chinese) [3] 郭楠.菊花形混合器流场计算及设计优化[D].北京:北京航空航天大学,2008. GUO Nan.Numerical simulation of the flow field and the optimal design of lobed mixers .Beijing:Beijing University of Aeronautics and Astronautics,2008.(in Chinese) [4] Cooper N J,Merati P,Hu H.Numerical simulation of the vortical structures in a lobed jet mixing flow[R].AIAA-2005-635,2005. [5] Ooba Y,Kodama H,Nakamura Y,et al.Large eddy simulation analysis of a 18-lobe convoluted mixer nozzle[R].AIAA-2002-0717,2002. [6] 邵万仁,吴寿生.涡扇发动机菊花型排气混合器的初步选型试验研究[J].航空发动机,1999(3):15-24. [7] 邵万仁,吴寿生.波瓣形排气引射混合器的试验研究[J].航空动力学报,2000,15(2):155-158. SHAO Wanren,WU Shousheng.Experimental research on lobed exhaust ejection mixer[J].Journal of Aerospace Power,2000,15(2):155-158.(in Chinese) [8] 金捷,何家德,徐镇勇,等.涡扇加力模型混合扩压器三维流场测量[J].燃气涡轮试验与研究,1996(2):45-49. [9] 张晓东,姜正礼,赵旺东.五孔探针在涡轮导向器出口流场测量中的应用[J].燃气涡轮试验与研究,2010,23(4):44-48. ZHANG Xiaodong,JIANG Zhengli,ZHAO Wangdong.Application of 5-hole probe in measurement of turbine nozzle outlet flowfield[J].Gas Turbine Experiment and Research,2010,23(4):44-48.(in Chinese) [10] 岳国强,韩万金,芦文才,等.五孔探针实验数据处理的线性插值法[J].热能动力工程,2004,19(5):526-529. YUE Guoqiang,HAN Wanjin,LU Wencai,et al.Linear interpolation method for processing the test data of five-hole probes[J].Journal of Engineering for Thermal Energy and Power,2004,19(5):526-529.(in Chinese) [11] 刘友宏,樊超,谢翌,等.波瓣数对波瓣强迫混合排气系统性能影响[J].航空动力学报,2010,25(8):1683-1689. LIU Youhong,FAN Chao,XIE Yi,et al.Effect of lobe numbers on the performance of a lobed mixer in the forced mixing exhaust system[J].Journal of Aerospace Power,2010,25(8):1683-1689.(in Chinese) [12] 谢翌,刘友宏.瓣高宽比对波瓣强迫混合排气系统性能影响[J].航空动力学报,2010,25(12):2787-2794. XIE Yi,LIU Youhong.Effect of ratio of height to width of lobe on the performance of a lobed mixer in a forced mixing exhaust system[J].Journal of Aerospace Power,2010,25(12):2787-2794.(in Chinese) [13] 刘友宏,谢翌.菊花形混合器混合效率理论计算[J].航空动力学报,2009,24(4):740-745. LIU Youhong,XIE Yi.Analytical solution of mixing efficiency of lobed mixer[J].Journal of Aerospace Power,2009,24(4):740-745.(in Chinese) [14] 刘友宏,郭楠,李江宁,等.后缘切角对波瓣混合器性能影响[J].航空动力学报,2009,24(9):1917-1922. LIU Youhong,GUO Nan,LI Jiangning,et al.Effect of cut angles at trailing edge on the performance of a lobed mixer[J].Journal of Aerospace Power,2009,24(9):1917-1922.(in Chinese) [15] Frost T H.Practical bypass mixing systems for fan jet aero-engines[J].Aeronautical Quarterly,1966,17(5):141-160.
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