One technical difficulty is cavitation, where low pressure behind a turning blade causes air bubbles.

一个技术难题是气穴现象，一旦发生气穴现象，位于旋转螺旋桨叶后方的低压会产生气泡。

Cavitation theory does not belong to Pelton turbine.

空化理论不属于水斗式水轮机。

The feedwater pumps are often faced with cavitation.

汽蚀是大型给水泵经常出现的问题。

This is the basis of the phenomenon called cavitation.

这就是所谓汽蚀现象的根据。

There is no cavitation damage and irrigation water and so on.

不存在汽蚀破坏及灌引水等问题。

Cavitation can make the surface trim have worn, and deep pits.

汽蚀可使阀内件的表面产生磨痕、深沟及凹坑。

The essential character of cavitation noise has been analysed.

本文分析了空化噪声的基本特性。

Vortex cavitation has been an important problem in cavitation researches.

漩涡空化一直是空化空蚀研究中的一个重要问题。

This method is more suitable for pump cavitation performance curve fitting.

该方法较适合于泵汽蚀性能曲线的拟合。

In both silicosis and CWP, these masses can undergo necrosis and cavitation.

无论硅肺还是CWP的大结节团块都可以出现坏死和空洞。

Only in some special cases the cavitation mechanism could be used under control.

而在另外一些情况下，则可有控制地利用空化机制。

Whilecopper propeller does not rust, it also can be eroded seriously by cavitation.

螺旋桨不会生锈但是会因为螺旋桨的空泡现象，对螺旋桨照成严重的侵蚀。

The chemical corrosion by the hydrazine hydrate solution enhances cavitation corrosion.

水合肼溶液的化学腐蚀又加剧了空泡腐蚀。

Thereby, measuring bubble size must be emphasized in study of reducing cavitation damage.

因此在掺气减蚀研究中，必须加强对气泡尺寸的检测。

Downstream of the valve's pressure increases, the cavitation bubble crush process process.

阀下游的压力升高，压破气泡的过程即空化过程。

The present paper analyzes the relationship between the body speed and THS cavitation noise.

本文对物体空化噪声与运动速度之间的相互关系进行了分忻。

For a long time, the pump cavitation has been regarding as a difficult problem to be resolved.

长期以来，泵汽蚀现象被认为是一个不易解决的问题。

As for chemical reaction mechanism, unified explanation now is the act of ultrasound cavitation.

对于声化学反应机理，现在统一的解释就是超声的声空化作用。

Because of its catholicity and complexity, cavitation is positively researched all over the world.

由于汽蚀现象的普遍性和复杂性，国内外都在积极进行研究。

It is suggested that low frequency fluctuation occurs with cavitation inception in water hydraulic pump.

提出了在纯水液压泵中气蚀初生伴随着低频压力脉动现象。

Cavitation performance good possess badly in the overall performance of appraisement hydraulic machinery.

而空化性能的好坏在评价水力机械的整体性能中占有愈来愈大的比重。

Hydrodynamic cavitation as a tool to control macro - micro - and nano - properties of inorganic materials.

以液力气蚀作用调控无机材料之宏观、微观及纳米特性。

The physical mechanisms of ultrasound are thermal mechanism, mechanical mechanism and cavitation mechanism.

超声作用的物理机制有热机制、机械机制和空化机制。

So preventing cold cyclinder from piercement should start from preventing cold cyclinder from cavitation erosion.

刺漏是由气蚀引起的，因此预防冷缸刺漏应从预防冷缸气蚀入手。

Test results show that this kind of throttle has stronger anti-cavitation ability than the one-step one of the same shape.

实验结果表明这种节流形式比相同形状的一级节流具有更强的抗气蚀性能。

Cavitation is a common harmful phenomenon in hydraulic transmission systems, frequently occurs near the orifice of the valves.

气穴是液压系统中常见的一种有害现象，经常发生在阀口附近。

And it's basically causing potentially a failure of the recirculating pump or a cavitation of these pumps, both are not good things.

那基本上引起了潜在的，循环泵的失效或者这些泵的空穴现象，两种都不是好事情。

Cavitation is one of the most common faults of hydropower units, and serious cavitation will endanger units 'operation directly.

空蚀是水轮机运行中最为常见的故障之一，严重时，它直接危及到机组的安全运行。

Result shows that the negative pressure and the cavitation can be minished by improving the structure of the valve seat and core.

通过分析发现，如对阀座和阀芯的结构进行改进，可以明显减小负压值与气穴发生的程度。