基于热线技术的脊状表面湍流边界层流动参数测试方法研究

Research About the Testing Method of Flow Parameters of Turbulent Boundary Layer over Riblet Surface Based on Hot-Wire Technology

针对脊状表面的结构特点及其湍流边界层的流动特性,深入研究了基于热线技术的脊状表面湍流边界层流动参数的测试方法,对所使用的风洞及测试设备做了相应改进,并探讨了提高实验测试精度的可行性措施。实验中使用了恒温式IFA300智能型热线风速仪对3种不同尺寸的对称V型脊状表面湍流边界层流动参数进行了测试。为了获取脊状表面的虚拟原点和摩擦速度,尝试运用Musker全壁面律公式的回归拟合方法对实验数据进行处理。实验测试结果表明:本实验中基于热线技术的脊状表面湍流边界层流动参数的测试方法是科学合理的。

Concerning with specialty of structure and flow characteristic of turbulent boundary layer over riblet surface, the testing method of turbulent boundary layer＇ s flow parameters of riblet surface is studied deeply. The win tunnel and testing equipments used in this experiment are improved accordingly and feasible approaches to enhance experimental veracity are also discussed. In the experiment three symmetrical V-riblet surfaces which are different in scale have been tested by using of IFA300 constant temperature hot-wire anemometer. In order to get virtual origin and friction velocity of riblet surface, experimental data is managed based on Musker flow velocity distribution formula. Experimental results show that the testing method of flow parameters of turbu- lent boundary over riblet surface based on hot-wire technology in this experiment is scientific and reasonable.