溃蚀

The CFD method was applied to calculate and simulate the form and action process of the cavitation at the representative character of the cavitation erosion on the surface of the hydraulic turbines.Some argumentation was presented that micro jet impacted the wall with a certain degree when bubble collapsed with the result that the maximal strain of the wall annularly distributed the local of the boundary touching the micro jet.Cavitation was gradual to develop regionally at the mode of chain reaction and di...

针对水轮机叶片表面气蚀的典型特征，利用CFD方法进行仿真计算，模拟气蚀形成和作用过程；根据模拟计算结果提出了新观点：空泡溃灭发生微射流以一定的倾角冲击壁面，壁面材料产生的最大应变在流束边界局部区域，呈环状分布；空泡气蚀在局部区域是渐进的，以"连锁反应"形式扩展，具有一定过流环境的分布特征；典型的冲蚀缺陷形貌是空泡气蚀在不同阶段的产物。

Employing the finite difference calculus, the cavitation bubble pulsating performance with the change of liquid viscosity, gas content, surface tension and condensability is obtained.

在系统地研究固壁面附近空泡溃灭过程的基础上，提出并研究了射流阈值、空泡在第一次和第二次脉动过程衰减蚀除机理以及空泡溃灭周期延长因子等问题。

2The infectant of vegetable surface can be cleaned out effectively by cavitation erosion which produced when air bubbles collapse and complex turbulencewhich caused by air flow.

气泡溃灭时产生的气蚀和气流引起水的翻滚、漩涡等复杂的扰动能有效的清除蔬菜表面的污染物。

The research has shown that the ourgassing of the Earth can be regarded as a key link,which connects the separated branches of the Earthscience into a whole mega system The essence of Earth outgassing is the expelling of mantle ichorspontaneously and radiately from the interior of the Earth,resulting in five gas spheres and gas geodynamics The upwelling of HANCONS makes the solid mantle and crust to ulcerate by the alkaline mesomatism,alteration and magma formation, and the ...

地球排气的实质是幔汁(HACONS超临界态流体)从深部自发向上、向外的辐射排放，结果形成了地球内外的 5个气圈和气体地球动力学，幔汁上涌后通过碱交代作用产生蚀变和岩浆并促使原来为固体的上地幔、地壳发生溃变，在地球的 3个基本动力，即重力、地球自转变速、圈层旋转差速和天体潮汐力联合作用的大前提下诱发出大地构造运动、地球演化和自然灾害。

The essence of Earth outgassing is the expelling of mantle ichorspontaneously and radiately from the interior of the Earth,resulting in five gas-spheres and gas geodynamics.The upwelling of HANCONS makes the solid mantle and crust to ulcerate by the alkaline mesomatism,alteration and magma formation, and the geotectonic movement,natural hazards and evolution of the Earth under the general control of gravity,rotation rate changes of the geospheres and tiding forces from the planets,especially the Moon.

地球排气的实质是幔汁（HACONS超临界态流体）从深部自发向上、向外的辐射排放，结果形成了地球内外的5个气圈和气体地球动力学，幔汁上涌后通过碱交代作用产生蚀变和岩浆并促使原来为固体的上地幔、地壳发生溃变，在地球的3个基本动力，即重力、地球自转变速、圈层旋转差速和天体潮汐力联合作用的大前提下诱发出大地构造运动、地球演化和自然灾害。

The pressure pulses propagate with rapidly declining strength and a speed of the same scale as velocity of sound.

近壁空泡溃灭是工程上研究空蚀问题的一个重点，它对泡壁瞬态特性计算的要求较高。

It is proposed that a new mechanism for bubble rebound is too great vorticity of vortex from jet impact.

空泡在刚性边界附近溃灭时，射流冲击产生的冲击波对空蚀起主要作用。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。