free stream wind的意思|示意

About the experiment, these experiments were conducted in the free stream wind tunnel, and vitiated air heater was used to simulate the high altitude flow condition.

本文试验在自由射流风洞中进行，利用空气加热器模拟高空飞行条件。

Both the ratio of friction velocity to free stream wind velocity and the thickness of airflow are subject to the sidewall effect, showing the increase trend with the decreasing aspect ratios.

随着风洞宽高比的减小，断面内中垂线上的气流摩阻速度与自由流速的比值以及受风洞边壁影响的气流厚度均增大。

During experiment, a directly connected wind tunnel was independently designed to simulate a free stream Mach at 5.3, based on which the dynamic process of inlet opening was studied;

实验中，自主设计了高超声速直联式风洞模拟自由来流马赫数5.3，通过测量进气道上壁面压力分布，研究了进气道开启过程的起动特性；