English translation for "空化数"

cavitatio umber
cavitation number

Example Sentences:

	1.	Further , the moving track of the cavity and its changing regularity of radius can be get along ~ vith the transformation of the pressure . in the calculation of this paper , matlab programming language is applied . in the past , fortran language is mostly used in scientific computation 空化现象与流场内的压力分布密切相关，根据压力的分布可以得到流场内的空化数分布，而空化数的分布决定了流场内的空蚀空化。
	2.	Relativel ~ ~ matlab language is more powerful than oilier computing language , especially in computation fluid mechanics , it helps to simply draw charts of vortex , stream function , velocity , pressure , and the amount of work can be extremely reduced , and the program coniplving can also be controlled easily 得到空化数的分布以后，进而分析流场内空泡的运动轨迹，最后得到空泡半径在流场内随压力的变化关系曲线，以及在流场内空泡半径沿压力最小点的分布规律。
	3.	In this thesis hydraulic experimental studies and theoretical analyses on the vortex - flow drop shaft were conduced and the following results were accomplished : ( 1 ) in the model test some hydraulic characteristics including the shape of air core in the center of the drop shaft , the radial distribution of water flow velocity and the distribution of pressure on the wall of the drop shaft were measured under the condition of high water head above 250m and large discharge above 1400m3 / s . ( 2 ) a kind of computational method for the spiral water flow in the air core region of drop shaft was discussed and applied and the results agree the experimental data well . ( 3 ) the total ratio of energy dissipation in the drop shaft can reach 90 % and the energy dissipation in every region was discussed quantitatively 本文通过试验研究与理论分析对旋流式竖井泄洪洞应用于高水头、大泄流量情况时存在的一些水力学问题进行了研究和探讨，取得以下主要成果：一、结合小湾工程导流洞改建，对高水头( 252m ) 、大泄流量( 1400m ~ 3 s )条件下旋流式竖井中的水流运动特征进行了比较全面的测量，包括空腔形态、径向流速分布及井壁压强等；二、提出了竖井空腔段螺旋水流水力计算方法，其计算结果与实测值吻合良好；三、利用试验与计算结果，对旋流式竖井的消能机理进行了探讨，对竖井各部分的消能能力有了总体认识；四、对竖井下部消力井的合理井深进行了优化试验研究，发现消力井合理深度为0 . 9d左右；五、通过试验研究，归纳出竖井水流总掺气量估算方法，为导流洞排气方案的设计提供了参考依据；六、在高水头、大流量条件下，竖井空腔段下部流速很高，尽管水流螺旋运动引起的离心力可以确保井壁压强保持正压，但空化数依然较低，因此竖井的空化空蚀始终是工程界关注的重大问题。
	4.	Variations in pressure with and without aeration in cavitation region are measured and the compressible characteristics of pressure waveforms and relation between mach number and compression ratio are analyzed ; the time - averaged pressure profiles of different air concentration in cavitation erosion region are measured , the variations of the pressure with air concentration and effects of back pressure on cavitation erosion are analyzed ; the relations between least air concentration to prevent cavitation erosion and flow velocity are proposed ; the cavitation numbers with and without aeration in cavitation region are compared 实测了空化区掺气前后压力的变化，分析了压力波形的可压缩流特征以及马赫数与压缩比的关系；实测了空蚀区不同掺气浓度的时均压力分布，分析了压力随掺气浓度的变化及背压对空蚀的影响；提出减免空蚀的最低掺气浓度与流速的关系，比较了掺气前后水流的空化数。

Similar Words：

"空化区" English translation, "空化区渗气" English translation, "空化区中心" English translation, "空化试验" English translation, "空化试验水筒" English translation, "空化水流参数" English translation, "空化水翼" English translation, "空化损坏" English translation, "空化特性" English translation, "空化特性曲线" English translation