长有压输水系统中水力振动特性的研究
首发时间:2008-09-22
摘要:本文指出水电站中有压输水系统中非恒定流的三种计算,介绍了一些水力振动事故分析,并进行了数值分析,指出更高阶弹性模型的精度会降低,对于具有长压力管道的水电站而言,压力管道内水体采用三阶弹性模型较为合适。并结合实例对有压输水系统进行了水力振动分析,得出水电站在三台机全负荷运行时是比较合理的。通过功率谱图与数值计算结果分析比较得到系统中低阶频率对管道振动的影响。
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Study of Hydraulic Resonance in a Long Pressurized Water Conveying System
Abstract:Three numerations of variational flow in a long pressurized water conveying system were pointed, and some accidents on hydraulic resonance in a plant have been introduced in the paper. The numerical computations has been established in order to point out that the precision of higher linear model will be reduced. For a long pressurized water conveying system, the three linear model is better for pressurized pipelines. With an example, hydraulic vibration in a long pressurized water is analysised, and running in three station units circs to pipe is better. With the power spectrum and numerical computations, the effect of low order frequency to pipe vibration in the system is counted.
Keywords: Hydraulic vibration Hydraulic resonance Numerical computations
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No.2421823018812220****
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