研究了影响中心回流区的主要因素。
The main factors which affect the center reflux area are investigated.
双流道叶轮内流动也不均匀,但没有出现明显的回流区,流态较好。
In the double-channel impeller, the flow has better flow pattern without obvious back-flow area.
管壁附近存在明显的回流再附区;
管壁附近存在明显的回流再附区;
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