分析了管内二元气体的混合机理，对不同流速影响混合长度规律的三维数值模拟进行了研究。
The mixing mechanism of dual-species gas in pipe is analyzed, and the effect of the purging velocity on the length of mixed region is numerically studied.
建立了含有微气泡的平板边界层方程，并采用一种简单的混合长度模型和有限差分方法对该方程进行了数值计算。
The equations of the boundary layer containing microbubbles on the plate are established, then calculated employing a simple mixing length model and a finite difference method.
混合室在流浆箱中起着均匀浆流、稳定压力的重要作用，而混合室的长度是混合室设计中的重要参数。
The mixing chamber of headbox plays an important role in homogenizing pulp flow and stabilizing pressure fluctuation of pulp. The length of mixing chamber is an important parameter.
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