在风洞气流场的观察和显示中，纹影法是最常用的方法。
The techniques of schlieren is a conventional method for observing anddisplaying the wind-tunnel phenomena.
气动特性实验表明在风洞气流速度比加油机最小飞行速度低16%的条件下，冲压涡轮输出功率即可满足加油需要。
It was found that the output power of ram air turbine can satisfy the flight refuel needs on conditions that the air speed of wind tunnel is 16% lower than the minimal flight speed of aircraft tanker.
这种风洞实质上是一种简单的气流试验台，它通过配套的设备能为实验提供各种可控制的气流。
This tunnel is, in substance, a simple air flow bench with necessary test devices offering various controlled streams for experiments.
通过风洞实验的方法，针对不同形态的6组横向沙丘模型，采用粒子图像测速系统，测量了模型沙丘周围气流水平速度和垂直速度的变化规律。
In this paper, the variations in the horizontal and vertical velocities over 6 different transverse dune models are investigated in a wind tunnel by applying the particle image velocimetry (PIV).
在激波风洞一激波管组合设备上开展了碳氢燃料超声速预混可燃气流的点火与燃烧实验研究。
Experimental investigation on ignition and combustion of supersonic premixed hydrocarbon fuel-air mixture has been conducted in the combination facility consisting of a shock tunnel and a shock tube.
这种紊流使风洞内的流谱与在较高的雷诺数下自由气流中的流谱相似。
This turbulence caused the flow pattern in the tunnel to be similar to the flow pattern in free air at a higher Reynolds number.
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。
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.
在风洞实验的基础上，提出了气流噪声向汽车内部传播的理论模型。
Proposes a theoretical model for aerodynamic noise transmitting towards interior cab of an automobile on the basis of the wind experiment.
通过在便携式风洞内模拟挟沙气流，研究了风沙流对土壤风蚀的影响。
In this paper, influence of wind-sand flow on soil wind erosion was discussed using portable wind tunnel to simulate natural wind.
通过风洞试验，对带升降副翼控制的自由翼气动特性也进行了实验研究，验证了位于自由翼后缘的升降副翼可有效地控制自由翼相对气流的平衡迎角。
The aerodynamic characteristics of the free wing are investigated in this paper. The wind tunnel test results shows that the control of the angle of attack of the fre…
通过风洞试验，对带升降副翼控制的自由翼气动特性也进行了实验研究，验证了位于自由翼后缘的升降副翼可有效地控制自由翼相对气流的平衡迎角。
The aerodynamic characteristics of the free wing are investigated in this paper. The wind tunnel test results shows that the control of the angle of attack of the fre…
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