低温高雷诺数下摩擦阻力测量及多孔介质减阻研究  

Skin friction measurement and drag reduction of porous media under cryogenic and high Reynolds number conditions

作　　者：孔文杰 董昊[1,2] 赵一迪 吴继飞[3] KONG Wenjie;DONG Hao;ZHAO Yidi;WU Jifei(College of Aerospace Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;State Key Laboratory of Mechanics and Control for Aerospace Structures,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;High Speed Aerodynamic Research Institute of China Aerodynamic Research and Development Center,Mianyang 621000,China)

机构地区：[1]南京航空航天大学航空学院,南京210016 [2]南京航空航天大学航空航天结构力学及控制全国重点实验室,南京210016 [3]中国空气动力研究与发展中心高速空气动力研究所,绵阳621000

出　　处：《空气动力学学报》2024年第8期84-92,I0002,共10页Acta Aerodynamica Sinica

摘　　要：为研究低温高雷诺数条件下多孔介质湍流减阻规律及雷诺数效应,在0.3 m低温连续式风洞开展了壁面摩擦阻力测量及多孔介质减阻试验。分别在光滑平板和多孔介质区域下游布置低温脉动压力传感器和油流,对脉动压力功率谱及下游全局摩擦阻力进行测量。结果表明:摩擦阻力系数随雷诺数的增大而减小;多孔介质减阻率随雷诺数的增大(增大马赫数或降低来流总温),呈无固定规律下降趋势,且多孔介质的引入,使下游脉动压力的低频信号强度增加,高频信号强度减弱;在马赫数Ma=0.300、雷诺数Re=7.51×10^(6)、来流总温T_(0)=140 K这一典型工况下,多孔介质仍具有11.4%的减阻率,初步验证了在低温高雷诺数条件下使用多孔介质减阻控制策略的可行性。To investigate the drag reduction laws and the Reynolds number effects of porous media under cryogenic and high Reynolds number conditions,this study conducted skin-friction measurements and drag reduction experiments in a 0.3 m transonic cryogenic wind tunnel.Pressure sensors and oil flow devices were installed downstream of the smooth plate and porous media region respectively,to measure the power spectra of fluctuating pressure and the global skin friction.It is shown that the skin friction coefficient decreases with the increase of Reynolds number.With the increase of Reynolds number(increasing the Mach number or decreasing the total temperature of the incoming flow),the porous media drag reduction ratio shows a non-uniform decreasing trend.Besides,the introduction of porous media,the low-frequency signal strength of the downstream pulsating pressure increases,and the intensity of the high-frequency signal is weakened.Under the typical condition that Mach number Ma=0.300,Reynolds number Re=7.51×10^(6) and the total temperature of the incoming flow T_(0)=140 K,the drag reduction ratio of porous media is 11.4%,which initially verifies the feasibility of the drag reduction control strategy under low temperature and high Reynolds number conditions.

关 键 词：壁湍流减阻 摩擦阻力 高雷诺数 低温油流 多孔介质 

分 类 号：V211.7[航空宇航科学与技术—航空宇航推进理论与工程]