以三峡水电站水轮机运行工况为模拟条件进行了混流式水轮机尾水管压力脉动试验研究。
Experimental studies on pressure fluctuation in draft tubes of Francis turbines have bean conducted, simulating operating conditions of the Three Gorges Hydraulic Power Station's turbines.
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。
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.
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。
Author suggests that increasing number of measurement taps and prolonging sampling time and enhancing sampling frequency will decrease signals aliasing and leakiness.
准确可靠地测量压力脉动，对流体脉动的理论和试验研究都是非常重要的。
Its measurement is very important for both theoretical and experimental researches of flow and pressure surges.
理论及试验证实它对油源压力脉动衰减幅度大，衰减频带宽，是一种性能良好的脉动衰减器。
The theory and experiment verifies that it is a good pulsating attenuator and has large attenuation amplitude and wide attenuation band to pressure pulsation of oil source.
通过与模型试验结果进行比较可以看出，本计算能够比较准确地预测尾水管内的压力脉动。
The comparison between the calculation results and experimental data indicates that the calculation in this paper can medict the pressure fluctuation in draft tube very well.
通过理论分析与模型试验，从时均压力、脉动压力、空化数等方面得出缓坡与陡坡过渡衔接部位采用抛物线型式较圆弧型式好的结论。
The parabolic shape is better than the arc shape through comparing time averaged pressures, fluctuating pressures and cavitations by theoretical analysis and hydraulic model experiments.
本文的研究重点包括车身表面脉动压力的求解和分析、车外远场噪声和车内噪声的预估以及实车道路试验研究。
This study focused on analysis of pressure fluctuation on the body surface, prediction of exterior far-field noise and interior noise and the road tests.
通过对模型验收试验的结果进行详细的分析，结果显示除部分工况点的压力脉动值外，模型转轮的各项性能满足合同要求。
The results of model test were analyzed. It is concluded that the performance of the model turbine is satisfying, with presspulsation on some operation point exception.
试验表明，该泵能有效地减少压力脉动，可近似达到无管路压力脉动的目的。
The experiments show that the pump can lower the flux pulse effectively.
通过脉动预真空压力蒸汽灭菌器B-D试验监测，分析并找出影响B-D试验结果的不合格因素。
This paper analyzes the disqualification factors influencing B-D test results by using B-D test monitoring.
通过脉动预真空压力蒸汽灭菌器B-D试验监测，分析并找出影响B-D试验结果的不合格因素。
This paper analyzes the disqualification factors influencing B-D test results by using B-D test monitoring.
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