跨声速风洞中使用短轴探管测量试验段核心流马赫数影响研究

Influence of Mach Number of Core Flow Measured by Short Centerline Probe in Transonic Wind Tunnel

在0.6 m×0.6 m连续式跨声速风洞中设计了一种新型短轴探管,用于测量试验段核心流马赫数的分布特性。为了研究不同跨声速试验段条件下短轴探管的测值特性,通过数值仿真研究了短轴探管在不同马赫数下对流场的影响。分别在跨声速孔壁试验段和槽壁试验段中开展了短轴探管用于测量试验段核心流马赫数风洞试验研究,并与长轴探管的试验结果进行了对比。试验结果表明,当Ma≤0.95时,两种试验段中短轴探管马赫数测值曲线与参照值曲线基本一致,差异较小;当Ma≥1.0时,孔壁试验段测值结果与参照值差异明显小于槽壁试验段结果,跨声速孔壁试验段消除头波干扰能力较槽壁试验段更强。

A new type of short centerline probe is designed to measure the core flow Mach number in the 0.6 m×0.6 m continuous transonic wind tunnel.In order to study the influence of different transonic test sections on the measured results of the short centerline probe,the influence of the short centerline probe at different Mach numbers is studied by numerical simulation.The short centerline probe is used to measure the Mach number of the core flow in the hole wall test section and the slot wall test section,respectively,and the test results are compared with those of the long centerline probe.The results show that the trend of Mach number curve measured by the short centerline probe in the two test sections is consistent with that of the reference value curve and the difference is small when Ma≤0.95.The difference between the measured value and the reference value of the hole wall test section is obviously smaller than that of the slot wall test section,and the anti head wave interference ability of the hole wall test section is stronger than that of the slot wall test section when Ma≥1.0.