摘要
为研究方腔内混合对流向受迫对流过渡的临界参数，通过数值模拟和模型实验，得到了不同工况下的流场、温度场，并将数值结果与实验结果进行了对比，通过一系列的数值计算，取得了均匀通风方式时混合对流处于受迫对流占优状态、自然对流受到抑制时的特征参数，指出描述方腔内混合对流的特征参数Ｇｒ／Ｒｅｎ中的ｎ不等于２，并发现当自然对流引起的旋涡消失时，自然对流对换热仍有一定的影响。
In order to simulate the fluid flow and heat transfer in a space station cabin, the relative importance of natural convection and forced convection has been investigated through numerical and experimental method. Flow patterns and isotherms obtained by means of numerical modelling are compared with those of the model experiments. A critical value Gr/Re n is obtained through careful study of the numerical results, for the uniform ventilation condition. The exponent n is not equal to 2. It is also found that even though the vortex caused by natural convection disappeared, natural convection may also affect the heat transfer of the mixed convection.
出处
《清华大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
1998年第8期60-63,共4页
Journal of Tsinghua University(Science and Technology)
基金
国家自然科学基金
关键词
混合对流
对流辐射耦合
换热
方腔
数值方法
mixed convection
combined convection and radiation
cavity
numerical method
model experiement
