空间站舱内侧上送侧下回对称通风方式数值模拟

Numerical simulation of upside air-supply bottom-side air-return symmetric ventilation in space station cabin

首先用封闭方腔自然对流换热典型问题验证了数值模拟的准确性,然后对侧上送侧下回对称通风方式进行不同工况的数值模拟,结果表明:在一定工况下该通风方式出现分叉解现象;当自然对流无量纲数Gr/Re2小于5时忽略重力影响的误差不超过5%;微重力水平低于10-3g0可认为等同于零重力;送风角度为45°时流场平均流速最大,建议30°-60°,且送风速度小于1.0m/s.

The classical numerical simulation of enclosed square cavity natural convection is verified firstly. Then the upside air- supply bottom- side air- return symmetric ventilation pattern is simulated numerically under different conditions. It concludes that this ventilation pattern could be optimum and bifurcation phenomena could exist under certain conditions. And that natural convection could be neglected when the value of dimensionless number Gr/Re 2 is less than 5 or microgravity is less than 10 -3g0. It suggests that air - supply angle could choose between 30 and 60, and at angle 45, the field velocity is maximum and air - supply velocity less than 1 m/s could be optimum.