2) low duty cycle
小占空因数
3) cavitation coefficient
空化系数
1.
Three-dimensional numerical simulations by commercial code CFX were conducted to observe the flow patterns and to measure valve flow coefficient,hydrodynamic torque coefficient and cavitation coefficient when butterfly valve with various opening degrees and uniform incoming velocity were used in a piping system.
应用专业流体分析软件CFX对蝶阀中的流体进行了三维模拟分析,并在阀盘处于不同的开启度(即阀盘的开启角度)下,研究了阀门的流动特性如流量系数、水力扭矩系数、空化系数等。
2.
The cavitation coefficient obtained from the simulation results is consistent with the model test.
水轮机叶片上的空化空蚀破坏造成水电站的频繁检修,利用计算流体力学软件Fluent对HL240型水轮机的设计工况进行数值模拟,模拟结果求出的空化系数与模型试验非常吻合。
3.
The cavitation coefficient can affect hydraulic perfonnance of turbine in the fact of effi- cency,output,cavitation,pressure fluctuation,runaway speed and hydraulic axial thrust,and it have badly effect in some operating points.
空化系数对水轮机的效率、出力、空化、压力脉动、飞逸转速及轴向水推力等性能均有一定影响,有的工况影响非常大。
4) cavitation number
空化数
1.
Experimental researches on drag characteristics of supercavitation bodies at small cavitation number
小空化数下超空泡航行体的阻力特性试验研究
2.
The orifice plates with various geometry size were used as hydrodynamic cavitation generator to study the relationship between many factor(such as discharge,inletpress,flow speed inorifice,δ/d and the ratio of wetted cross-section area to cross section area) and the cavitation number.
采用了不同几何尺寸的孔板作为水力空化发生器,研究了流量、进口压力、孔内流速、孔板的孔径与厚度之比及孔板过流总面积与管道横截面积的比值对空化数的影响,得出进口压力控制在20mH2O,孔内流速控制在14。
3.
The orifice plates with various geometry size were used as hydrodynamic cavitation generator to study the relationship among,inlet pressure,discharge,flow speed in orifice,δ/d and the ratio of wetted cross-section area to cross section area and the cavitation number.
采用了不同几何尺寸的孔板作为水力空化发生器,研究了进口压力、流量、孔内流速、孔板的厚度与孔径之比及孔板过流总面积与管道横截面积的比值对空化数的影响;分析了本实验装置的水流空化状态:本实验装置能产生空化现象。
5) cavitation factor
空化系数
1.
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.
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。
2.
An introduction was given to the influences of some factors on test results about pressure fluctuation performances in pressure fluctuation test of water turbines,the factors including the locations and number of measurement points,sampling frequencies and time,and cavitation factors.
介绍了水轮机压力脉动试验中测量位置、测点数量、信号采样频率及采样时间、空化系数等因素对压力脉动试验结果的影响,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。
6) cavitation parameter
空化参数
补充资料：空化数
见空化。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条