... effective cross-sectional area 有效截面面积 flow cross-sectional area 流动截面积 free cross-sectional area 自由截面积 ...
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Time dependent calculation for a suddenly imposed pressure gradient has shown that variation of the cross sectional area reduces inertial effect in the contraction flow region.
压力差为阶跃变化的情况下数值计算结果说明了收缩部的断面积的时间变化减少了收缩部的惯性效果。
In a steady internal flow the Mach number can only reach 1 at a minimum in the cross-sectional area.
在一个稳定的内部流动马赫数只能达到一在最低限度，在截面积。
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