Impingement heat transfer from the rib roughened surface within 2 dimensional arrays of circularjet has been experimentally investigated.
实验研究了二维圆射流阵列冲击肋粗糙表面换热。
2
Instead of using wings, the coleopter employed a circular extension serving as the outer part of the jet engine while helping the aircraft achieve level flight, as well as vertical ascent and landing.
环翼机没有尾翼，而是采用一个延伸的圆形作为外部引擎，帮助飞机完成水平飞行和垂直起飞降落。
3
The heavier cloud cover to the north and west of this circular pattern was likely a response to a low-pressure system and to jet stream dynamics.