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射流式水泵简单可靠,适用范围广阔,具有很大的发展前途。本文小結了我們研究射流式水泵的无因次性能、最优性能与装置性能等问题的初步成果,并指出了它們与国外成果的某些分歧。本文主要內容包括:(一)推导并初步验证了射流式水泵的无因次性能方程,从而发现,在喉管与噴嘴的断面面积比m较小的情况下,射流在喉管进口的压力下降对于躬流式水泵的性能具有显著的影响,因此不能不如实地加以考虑;(二)提出了確定射流式水泵无因次最优参数的三种方法,并由此闡明了装置效率线与其包络线的联系和区别;(三)综合考虑离心式水泵、射流式水泵、管路与水井的性能,提出了一种适用于各种不同射流式井水泵装置的联合工况确定法。
Jet pump simple and reliable, a wide range of applications, with great development prospects. This paper summarizes the preliminary results of our research on the dimensionless performance, optimum performance and device performance of jet pumps, and points out some differences between them and the overseas achievements. The main contents of this paper include: (1) Deriving and preliminary verifying the dimensionless performance equation of the jet pump, we find that the jet pressure drop at the inlet of the throat under the condition of smaller section area ratio m between the throat and the jet nozzle Which has a significant influence on the performance of the bowed water pump and therefore can not be considered truthfully; (3) Three methods for determining the non-dimensional optimal parameters of the jet pump are proposed, and the relationship between the device efficiency line and its envelope (3) Considering the performance of centrifugal pumps, jet pumps, pipelines and wells, a new method is proposed to determine the joint conditions for various jet well pumps.