Free-flowtunnel used more round arch straight wall form cross-section.
无压隧洞多采用圆拱直墙形断面。
2
This turbulence caused the flow pattern in the tunnel to be similar to the flow pattern in free air at a higher Reynolds number.
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。
3
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.