以试验研究为基础，结合万家寨引黄工程实践，论述了无压流与有压流的渐变连接形式和影响因素。
目前，国内外对水利工程中无压流到有压流过渡段水流的研究主要集中在泵站前池的流场问题。
Present research on transition section from non-pressure flow to pressure flow focuses on the water of Pumping Station forebay.
在相同叶轮出口速度下，叶片扩压器比无叶扩压器中气流速度下降迅速，叶轮出口处平均流场趋于均匀。
Under the same impeller outlet speed, the flow speed of blade diffuser is faster than the vaneless one. The average flow field at impeller outlet trends to uniform.
分别对冷态条件下，无隙锥形旋流器燃烧室前扩压器内流场的分叉现象以及燃烧室内燃烧空间的流场分叉现象进行了数值模拟计算。
The numerical simulations of bifurcation phenomena in a combustor with a non slot conical swirler and in a diffuser fixed before the non slot conical swirler have been carried out.
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