水轮机压力脉动测试方法的研究与讨论  

Study on the Testing Method of Pressure Fluctuation of the Water Turbine

作　　者：田锋社[1] 

机构地区：[1]陕西工业职业技术学院,陕西咸阳712000

出　　处：《噪声与振动控制》2006年第4期111-113,116,共4页Noise and Vibration Control

基　　金：陕西省教育厅专项科研基金项目(编号05JK141)

摘　　要：介绍了水轮机压力脉动试验时空化系数、测量位置及测点、信号采样频率及采样时间等因素对试验结果的影响。并提出在进行压力脉动试验时,应增加测点、延长采样时间、提高采样频率以避免信号遗漏和信号混叠等现象的发生。同时,建议针对水轮机的重要运行工况,增加不同空化系数下的压力脉动试验,以避免在真机运行时可能产生“空化自激”现象,确保原型机组的安全运行。In this paper, it is introduced to the influence of cavitation factor, measurement taps, sampling frequency and sampling time on the test result in pressure fluctuation test of the water turbine. Author suggests that increasing number of measurement taps and prolonging sampling time and enhancing sampling frequency will decrease signals aliasing and leakiness. At same time, author suggests to change cavitation factor to important operation condition during pressure fluctuation test so to avoid producing the phenomenon of cavitation stimulus in the prototype operation.

关 键 词：振动与波 水轮机 压力脉动 空化系数 采样频率 采样时间 空化自激 

分 类 号：TM312[电气工程—电机] O353[理学—流体力学]