非对称附面层抽吸对高负荷扩压叶栅旋涡结构的影响
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摘要
为了改善高负荷扩压叶栅流道内旋涡结构,达到降低流动损失,提高气动性能的目的。本文借助实验校核CFD方法,对某高负荷扩压叶片进行了非对称孔式附面层抽吸。使用Q准则作为本次旋涡判定的准则,并对原型及抽吸方案的损失和涡量场进行了分析,并对其建立了旋涡结构模型。在原型方案中,由通道涡与集中脱落涡的掺混形成的角区损失占出口损失的主要部分,采用非对称抽吸后,抽吸侧内角区损失有明显的减弱,但非抽吸侧的损失沿展向和周向迅速扩展。
In order to improve the vortex structure in the highly-loaded compressor cascades,to achieve the purpose of reducing the loss and improving the aerodynamic performance. This study investigates the asymmetric boundary layer suction on a highly-loaded compressor cascades by using the CFD methods which was validated by an experiment. Q criterion was used in vortex determination to analyze the total pressure loss and vorticity that the original and suction cascades. Furthermore,the model of vortex structures was established. The original blade exhibited loss of corner vortex mainly formed by blending of passage vortex and concentrated shed vortex. The strength of passage vortex in the suction side was weakened evidently through asymmetric suction. After asymmetric suction near the separation point,the total pressure loss in the corner of the suction side decreased considerably,and the loss of non-suction side migrated rapidly along the spanwise and pitchwise directions.
In order to improve the vortex structure in the highly-loaded compressor cascades,to achieve the purpose of reducing the loss and improving the aerodynamic performance. This study investigates the asymmetric boundary layer suction on a highly-loaded compressor cascades by using the CFD methods which was validated by an experiment. Q criterion was used in vortex determination to analyze the total pressure loss and vorticity that the original and suction cascades. Furthermore,the model of vortex structures was established. The original blade exhibited loss of corner vortex mainly formed by blending of passage vortex and concentrated shed vortex. The strength of passage vortex in the suction side was weakened evidently through asymmetric suction. After asymmetric suction near the separation point,the total pressure loss in the corner of the suction side decreased considerably,and the loss of non-suction side migrated rapidly along the spanwise and pitchwise directions.
引文
[1]ZHANG Y F.Investigation of endwall flow behavior and its control strategies in highly-loaded compressor[D].Xi'an:Northwestern Polytechnical University,2010.
[2]LIESNER K,MEYER R,SCHULZ S.Non-symmetrical boundary layer suction in a compressor CASCADE[J].Journal of theoretical and applied mechanics,2012,50(2):455-472.
[3]CHEN P P,QIAO W Y,HASHMI S F A,et al.Passive control of hub-corner separation/stall using axisymmetrichub contouring[J].Proceedings of the institution of mechanical engineers,part G:journal of aerospace engineering,2012,226(10):1214-1224.
[4]史里希廷H.边界层理论(上册)[M].徐燕侯,译.北京:科学出版社,1988.SCHLICHTING H.Boundary-layer theory[M].XU Yanhou,trans.Beijing:The Science Publishing Company,1988.
[5]KERREBROCK J L,REIJNEN D P,ZIMINSKY W S,et al.Aspirated compressors[R].ASME Paper 97-GT-525.American:ASME,1997.
[6]SCHULER B J,KERREBROCK J L,MERCHANT A.Experimental investigation of an aspirated fan stage[C]//ASME Turbo Expo 2002:Power for Land,Sea,and Air.Amsterdam,The Netherlands:American Society of Mechanical Engineers,2002:433-444.
[7]REIJNEN D P.Experimental study of boundary layer suction in a transonic compressor[D].Cambridge,MA:MIT,1997.
[8]GBADEBO S A,CUMPSTY N A,HYNES T P.Control of three-dimensional separations in axial compressors by tailored boundary layer suction[J].ASME journal of turbomachinery,2008,130(1):011004.
[9]陆华伟,张永超,刘俊,等.附面层抽吸对高负荷扩压叶栅变冲角性能影响[J].工程热物理学报,2017,38(4):726-732.LU Huawei,ZHANG Yongchao,LIU Jun,et al.Investigation of boundary layer suction on compressor cascade incidence[J].Journal of engineering thermophysics,2017,38(4):726-732.
[10]郭爽,陆华伟,宋彦萍,等.端壁附面层抽吸对大转角扩压叶栅旋涡影响的实验研究[J].推进技术,2013,34(11):1466-1473.GUO Shuang,LU Huawei,SONG Yanping,et al.Experimental investigation on effects of endwall boundary layer suction on vortexes of high-turning compressor cascades[J].Journal of propulsion technology,2013,34(11):1466-1473.
[11]张华良,王松涛,王仲奇.端壁附面层抽吸对扩压叶栅内分离结构的影响[J].热能动力工程,2006,21(6):565-568.ZHANG Hualing,WANG Songtao,WANG Zhongqi.Impact of end-wall boundary layer suction on the separation structure in a diffuser cascade[J].Journal of engineering for thermal energy and power,2006,21(6):565-568.
[12]陈绍文,郭爽,宋宇飞,等.局部附面层抽吸对高负荷扩压叶栅流动特性的影响[J].工程热物理学报,2010,31(3):407-410.CHEN Shaowen,GUO Shuang,SONG Yufei,et al.Effects of local boundary layer suction on the flow characteristic of highly-loaded compressor cascade[J].Journal of engineering thermophysics,2010,31(3):407-410.
[13]陈绍文,郭爽,陈浮,等.局部附面层吸除对高负荷扩压叶栅气动性能的影响[J].航空动力学报,2015,25(8):1836-1841.CHEN Shaowen,GUO Shuang,CHEN Fu,et al.Effects of local boundary layer suction on aerodynamic performance of highly-loaded compressor cascades[J].Journal of aerospace power,2015,25(8):1836-1841.
[14]张龙新,陈绍文,郭昊雁,等.端壁采用孔式抽吸对扩压叶栅气动性能的影响[J].推进技术,2013,34(9):1204-1208.ZHANG Longxin,CHEN Shaowen,GUO Haoyan,et al.Effects of end-wall taking hole-suction on aerodynamic performance of a compressor cascade[J].Journal of propulsion technology,2013,34(9):1204-1208.
[15]HUNT J C R,WRAY A A,MOIN P.Eddies,stream,and convergence zones in turbulent flows[R].Report CTR-S88.USA:Centre for Turbulence Research,1988.
[2]LIESNER K,MEYER R,SCHULZ S.Non-symmetrical boundary layer suction in a compressor CASCADE[J].Journal of theoretical and applied mechanics,2012,50(2):455-472.
[3]CHEN P P,QIAO W Y,HASHMI S F A,et al.Passive control of hub-corner separation/stall using axisymmetrichub contouring[J].Proceedings of the institution of mechanical engineers,part G:journal of aerospace engineering,2012,226(10):1214-1224.
[4]史里希廷H.边界层理论(上册)[M].徐燕侯,译.北京:科学出版社,1988.SCHLICHTING H.Boundary-layer theory[M].XU Yanhou,trans.Beijing:The Science Publishing Company,1988.
[5]KERREBROCK J L,REIJNEN D P,ZIMINSKY W S,et al.Aspirated compressors[R].ASME Paper 97-GT-525.American:ASME,1997.
[6]SCHULER B J,KERREBROCK J L,MERCHANT A.Experimental investigation of an aspirated fan stage[C]//ASME Turbo Expo 2002:Power for Land,Sea,and Air.Amsterdam,The Netherlands:American Society of Mechanical Engineers,2002:433-444.
[7]REIJNEN D P.Experimental study of boundary layer suction in a transonic compressor[D].Cambridge,MA:MIT,1997.
[8]GBADEBO S A,CUMPSTY N A,HYNES T P.Control of three-dimensional separations in axial compressors by tailored boundary layer suction[J].ASME journal of turbomachinery,2008,130(1):011004.
[9]陆华伟,张永超,刘俊,等.附面层抽吸对高负荷扩压叶栅变冲角性能影响[J].工程热物理学报,2017,38(4):726-732.LU Huawei,ZHANG Yongchao,LIU Jun,et al.Investigation of boundary layer suction on compressor cascade incidence[J].Journal of engineering thermophysics,2017,38(4):726-732.
[10]郭爽,陆华伟,宋彦萍,等.端壁附面层抽吸对大转角扩压叶栅旋涡影响的实验研究[J].推进技术,2013,34(11):1466-1473.GUO Shuang,LU Huawei,SONG Yanping,et al.Experimental investigation on effects of endwall boundary layer suction on vortexes of high-turning compressor cascades[J].Journal of propulsion technology,2013,34(11):1466-1473.
[11]张华良,王松涛,王仲奇.端壁附面层抽吸对扩压叶栅内分离结构的影响[J].热能动力工程,2006,21(6):565-568.ZHANG Hualing,WANG Songtao,WANG Zhongqi.Impact of end-wall boundary layer suction on the separation structure in a diffuser cascade[J].Journal of engineering for thermal energy and power,2006,21(6):565-568.
[12]陈绍文,郭爽,宋宇飞,等.局部附面层抽吸对高负荷扩压叶栅流动特性的影响[J].工程热物理学报,2010,31(3):407-410.CHEN Shaowen,GUO Shuang,SONG Yufei,et al.Effects of local boundary layer suction on the flow characteristic of highly-loaded compressor cascade[J].Journal of engineering thermophysics,2010,31(3):407-410.
[13]陈绍文,郭爽,陈浮,等.局部附面层吸除对高负荷扩压叶栅气动性能的影响[J].航空动力学报,2015,25(8):1836-1841.CHEN Shaowen,GUO Shuang,CHEN Fu,et al.Effects of local boundary layer suction on aerodynamic performance of highly-loaded compressor cascades[J].Journal of aerospace power,2015,25(8):1836-1841.
[14]张龙新,陈绍文,郭昊雁,等.端壁采用孔式抽吸对扩压叶栅气动性能的影响[J].推进技术,2013,34(9):1204-1208.ZHANG Longxin,CHEN Shaowen,GUO Haoyan,et al.Effects of end-wall taking hole-suction on aerodynamic performance of a compressor cascade[J].Journal of propulsion technology,2013,34(9):1204-1208.
[15]HUNT J C R,WRAY A A,MOIN P.Eddies,stream,and convergence zones in turbulent flows[R].Report CTR-S88.USA:Centre for Turbulence Research,1988.