火电厂补给水系统气垫式调压室的数值模拟

火电厂补给水系统具有管道布置受地形影响起伏波折和管道长的特点，在断电停泵时管道上凸点容易产生负压。气垫式调压室是工程中消除管道负压的重要措施之一，文中研究了以气垫式调压室及水泵为边界的管道水力过渡过程，建立了数学模型，并对实际工程的补给水系统进行了计算，结果表明设置气垫式调压室后管道由于断电停泵而产生的负压完全消除，说明气垫式调压室解决火电厂补给水系统管道的负压问题效果显著。气垫式调压室在火电厂补给水系统中已得到成功应用。

Numerical simulating of air-cushioned surge chamber in water supply system of thermal power station

In general, long pipe of water supply system of thermal power station rise and fall with topography variation. Negative pressure would easily exist at convex points of the pipe during pumps failure. Air-cushioned surge chamber is one of the important protective measures. In the paper transient phenomenon of the pipe in which air-cushioned surge chambers and pumps were as boundaries was studied. The numerical model was set up and was applied to calculate a water supply system of a power station. The results show that negative pressure disappears completely in the pipe with air-cushioned surge chambers. It was success that an air-cushioned surge chamber was used to protect pipe. Recently air-cushioned surge chamber has been successfully applied to water supply system of thermal power stations .