摘要
为了地面模拟空间飞行器在微重力条件下的对流换热 ,抑制自然对流 ,消除或减小重力的影响 ,研究了将缩小尺寸和减小压力相结合的缩比 -减压模拟技术 ,并通过数值计算对这一技术进行了验证。研究表明 ,缩比 -减压法可以克服缩比法和减压法在应用时的不足。不论缩小尺寸和减小压力的程度如何 ,只要缩减比相等 ,自然对流的抑制效果就相同。在工程应用中 ,对一定的原型工况 ,采用缩减比参数比采用 Gr/Re2 参数更直观 。
A technique was developed and verified numerically to simulate micro gravity convection in spacecraft in normal gravity ground based experiments.The technique suppresses the natural convection and eliminates or lessenes the influence of gravity by reducing the scale and pressure of the ground based. The results show that the disadvantages of reducing the scale or reducing the pressure can be overcome by combining the two methods. Natural convection can be suppressed to the same extent by reducing the scale and pressure by the same ratio, regardless of the size of the reduction. For a prototype, the scale and pressure reduction ratio is more easily attained maintaining than Gr/Re 2 in engineering applications. The model scale and working pressure in the ground based experiment can be predicted from the scale and pressure reduction ratio.
出处
《清华大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2001年第2期92-94,98,共4页
Journal of Tsinghua University(Science and Technology)
基金
国家"八六三"高技术项目!(86 3-2 -4 )
国家自然科学基金资助项目!(5 96 86 0 0 3)
