The flow analysis in the tip between front board and impeller was emphasized, which reflected the advantage of semi-openimpeller when it transported the 2-phase medium.
并着重对前盖板与叶轮间隙内的流动进行了分析，揭示了半开式叶轮输送两相流介质的优点所在。
2
This calculation result provides design basis for the establishment of stock pump with semi-open and fewer blades impeller.