Free-flow tunnel used more round arch straight wall form cross-section.
无压隧洞多采用圆拱直墙形断面。
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。
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。
After the study, further recongniztion are done to flow characteristics of high enthalpy free piston shock wave wind tunnel.
研究表明：由于粘性相互作用，高焓激波风洞实验段平板静压测量值远高于实际自由流静压。
The study of water-air two-phase flow in long-distance free flow tunnel is of great significance to the conveyance capacity and operation safety of water diversion project.
长距离无压引水隧洞水气两相流的研究对于引水工程过流能力及运行安全具有重要的理论意义及指导作用。
In free flow pattern and submerged flow pattern, as long as flow movement meet the dynamic similar criterion can reach the similarity of spillway tunnel flow pattern;
在自由流和淹没流时，只要水流运动满足动力相似准则就可达到泄洪洞水流流态的相似；
In free flow pattern and submerged flow pattern, as long as flow movement meet the dynamic similar criterion can reach the similarity of spillway tunnel flow pattern;
在自由流和淹没流时，只要水流运动满足动力相似准则就可达到泄洪洞水流流态的相似；
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