双泵切换过程模拟及灵敏度分析

Simulation and Sensitivity Analysis on Process of Switching Double Centrifugal Pump

对双泵并联给水系统中泵切换过程进行了试验与模拟研究,通过试验结果验证了模型的正确性。利用模型对试验过程进行灵敏度分析,得出以下结论:双泵并联给水系统在泵切换过程中系统流量越小、离心泵转动惯量越大,则系统失水量越大,最低流量越小,系统恢复稳定时间越长;止回阀特征时间越小,主回路流量波动越趋于稳定,但对切换过程系统流量波动影响十分有限。

The experimental and simulating processes of switching centrifugal pump in the double centrifugal pump water supply system were studied.The experiment results verified the validity of the model.Based on the sensitivity analysis of the experimental process with the model,we can get the following conclusions： In the process of switching centrifugal pump in the double centrifugal pump water supply system,the smaller the system flow and the greater the centrifugal moment of inertia,the greater the loss water,the smaller the minimum flow rate,the longer the system recovery stability;the smaller the characteristic time of the check valves,the more stable the flow volatility of the main circuit,but the volatility of the system flow during switching is very limited.