From this formula we can explain the tendency that the hydrovibration frequency increased with decreasing wicket gate opening of Francis turbines.

此式可以解釋水力振動頻率隨混流式水輪機(jī)導(dǎo)葉開度減小而增高的趨勢日韩欧美一区中文字母视频，并用兩個壓力梯度方程初步闡述了壓力脈動振幅隨工況而變化的現(xiàn)象。

At present, most hydropower plants close the wicket gate by using the closing law with two or three slopes. In fact, as the unit capacity goes up and the turbine working range of water head be even wider than before, so that the fixed closing law with two or three slopes can't control the unit stability effectively when the big fluctuation transient comes op.

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It will promote capabilities of domestic independent researching of water-jet deep-penetrating technology.

本文以井下位移檢測記錄法對水力深穿透射孔機(jī)在線測量展開研究。

The age-calculated distribution shows hydraulic continuity of water-bearing medium, which is a basic premise to create mathematic model for prediction of the inflow.

計算的年齡分布還顯示了含水介質(zhì)的水力連續(xù)性日韩亚洲欧美激情视频，這是建立隧道涌水量預(yù)測數(shù)學(xué)模型的基本前提国内大量愉拍人妻精品视频。

Has rich forests and water resources, rich rice, sugar, coconut and so on.

有豐富的森林和水力資源，盛產(chǎn)大米黃色視頻久久免費、蔗糖国产黄色网站在线看、椰子等。

The sample data of impinging pressure of irrigating water column impinging to seedbed furrow can been direct collected by computer,and the water power characteristic of impinging water column can been studied by analyze the sample data.

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And it has already been developed from a simple and low fluid volume, low displacement fracturing well stimulation method into a mature technology.

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Pump head range and velocity triangle was used with iteration approach for initial model and CFD simulation was applied for parameters decision.

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Due to complicated inside structure of valve and plenty of flow pattern, it has theoretical meanings and practical value to study valve inside flow on the view of hydraulics, especially large diameter cyclic type regulating valve.

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