压力损失系数受雷诺数的影响较小，基本是随着雷诺数的增大而减小的；
The pressure loss coefficient is affect by the Re number smaller, basic is decreased with increasing Re.
计算了雷诺数为8.9 ~ 1000.0时圆球绕流受到的阻力，分析尾涡形状及长度随雷诺数的变化规律。
The drag on the sphere was calculated for Reynolds numbers8.9to1000.0, and the shape and length of the wake behind the sphere were investigated.
结果表明，窄隙流道内的换热在低雷诺数区表现出与普通流道不同的多变特性，而在高雷诺数区与普通流道相近。
The results show that the performance of heat transfer in lower re number region is poly tropic, and that in higher re region is similar to conventional channel.
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