锥体后速度场与压力场的测量与分析  

Measurement and Analysis of Velocity and Pressure Distribution Behind a Cone

作　　者：姚一鸣 王洪伟[1,2] YAO Yi-ming;Wang Hong-wei(School of Energy and Power Engineering, Beihang University, Beijing 100191, China;National Key Laboratory of Science and Technology on Aero-Engine Aero-thermodynamics, Beijing 100191, China)

机构地区：[1]北京航空航天大学能源与动力工程学院,北京100191 [2]航空发动机气动热力国防科技重点实验室,北京100191

出　　处：《气体物理》2017年第5期46-63,共18页Physics of Gases

摘　　要：利用全流向十七孔压力探针,测量了Re=1.5×10~5与Re=3.0×10~5(基于锥体底面直径),攻角为0°,锥角为60°的圆锥体后流场速度与压力分布,并用烟线法进行了流场显示对比,得到了所述两种来流条件下锥体后流动速度场与压力场的详细实验测量数据.对速度与压力分布特征进行相关分析后,得到了两种来流条件下流场涡量ω与耗散熵产S_f云图.同时发现在两种来流条件下,锥体后流场可明显划分为3个区域.轴向速度V_z沿锥体轴线分布规律非常相似,均存在3个低速极值点,且锥体后流动驻点位置静压力均基本等于环境静压力.The detailed measurements of velocity and pressure distribution behind a cone were obtained by using an omnidirectional17-hole pressure probe.The cone angle is60°,the attack angle is0°and the inlet conditions are Re=1.5x105and Re=3.0x105.The flow field was also visualized by smoke trace and compared with measurement result.Through the analysis of both the velocity and the pressure field,the distributions of vorticity and entropy production caused by viscous dissipation were obtained.For both the two inlet conditions,the distributions of axial velocity along the cone axis are exactly similar.Three low-speed extreme points were found,and one is over the stagnation point,the other two are under it.The flow field is easy to be divided into three subzones:main flow zone,shear zone,and inner-vortex zone.At the stagnation points of both the two flow fields,the static pressures are approximately equal to the environment static pressure.

关 键 词：圆锥体 流场 流动测量 钝体尾迹 气动压力探针 

分 类 号：V411.3[航空宇航科学与技术—航空宇航推进理论与工程]