气穴现象

气穴现象对DME（二甲醚）喷油特性影响的仿真研究

Simulation of Cavitation Effects on DME Injection Characteristics

液压阀气穴现象的研究

The Research of Cavitation of Hydraulic Valve Port

液态LPG喷射发动机喷嘴内部气穴现象的数值解析

Simulation of Cavitation Phenomenon in Injector of Liquid Phase LPG Engine

科学家把这种现象称为“气穴现象”（Cavitation）。因为经历太多“气穴现象”对许多珍贵植物有害，所以知道这种现象发生前的时间非常重要。

Scientists call the phenomena " cavitations " and , since too many cavitations can kill trees - sometimes endangering valuable plantations - it 's crucial to know when they start .

以DISPEN、KONI减振器为例，分析了减振器的循环油路、阀结构选取及气穴现象、油汽分离对减振器性能的影响。

With taking the DISPEN , KONI dampers as the examples , the effects of circulating oil circuit , valve structure selection and air hole , oil vapor separation on the performance of the dampers are analyzed .

挤压油膜阻尼器结构参数对气穴现象影响的实验研究

Effects of structural parameters of SFD on cavitation

挤压油膜阻尼器内气穴现象的实验研究

Experimental Research on Cavitation of Squeeze Film Dampers

液压挖掘机气穴现象的机理及控制措施

Mechanism and Controls of Airlock in Hydraulic Excavator

液压系统气穴现象研究

Research on Cavitation in Hydraulic System

这种现象叫作气穴现象，会很快使叶轮气蚀，损坏。

Such phenomenon is being called as cavitation , resulting in cavitation erosion and damage of impeller in fast manner .

元件工作室内存在气穴现象，气泡的溃灭对元件造成损坏。

There existed cavitation in work room of the element , and the crumble and fall of air bubble broke the efflux element .

汽蚀是由于流场中局部压力低于流体饱和蒸汽压，液体汽化并产生充满气体或蒸汽的气穴现象。

Cavitation is the formation of vapor bubbles within a liquid where the flow dynamics causes the local static pressure to drop below the vapor pressure .

其主要原因有：（1）油液中混入空气，在先导阀前腔内形成气穴现象而引发高频噪声。

The main reason are : ( 1 ) mixed with oil in the air , the pilot valve in the cavity prior to the formation of cavitation caused by high-frequency noise .

同时对球阀有无气穴现象分别进行了噪声测试和频谱分析，试验结果表明，气穴现象使球阀噪声级增加。

Furthermore , the noise spectrums of the ball valve in cavitation and non cavitation cases were measured . The results show that the cavitation phenomenon around the orifice makes the noise level of the ball valve increased .

气泡现象在自然界和工业生产过程中广泛存在。例如：制冷系统中制冷剂的循环过程；液压系统的气穴现象；天然气的开采和运输以及沸腾现象等。

Bubble phenomena exist extensively in nature and industrial processes , such as the cyclic process of refrigerant in refrigerating system , cloud cavitation in hydraulic system , exploit and transit of natural gas , boiling phenomenon and so on .

气穴现象是诱发液压元件噪声最普遍、最主要的原因之一，它会使液压泵的效率降低、损坏零件、缩短液压元件和管道的寿命、造成流量和压力的脉动。

Cavitation is one of the most common and important noise-induced factors in hydraulic components , it will lower the efficiency of hydraulic pumps , damage parts , shorten the life of hydraulic components and pipes , cause the pulsation of flow and pressure .

通过高水基液压阀流体气蚀的数学模型，研究高水基液压阀低压密封的汽穴形成，找出最易产生气穴与气蚀现象的位置。

By using cavitation mathematical model of high water-based hydraulic valve , cavitation form of low pressure sealing will be researched , and the positions that produce cavitations will be easily found .

结论显示，单体水液压支柱的流场稳定，且当支柱正常工作时，支柱内腔不会产生气穴与涡流现象，避免了能量的损失与噪声的加剧。

It is resulted that the inner flow field is stable , the cavitations and vortex phenomena are not produced in the inner cavity during the pillar normal working . Which does not result in loss of energy and noise intensifies .

仿真结果表明：高压流体在节流口处是速度突变最大和压降最大的地方，在节流口区域处很容易观察到有气穴和漩涡现象发生。

The simulation results showed that the high pressure fluid speed mutation and pressure drop is the largest when high pressure fluid flow through the throttle mouth place . The appearance of cavitations and eddy was easily to observe at the place of throttling mouth area .

随着入口压力的增大，液流速度变快，节流口处的最小压强变小，进而容易产生气穴、漩涡等现象。

As inlet pressure increases , the flow speed becomes faster , smaller the minimum pressure near orifice becomes small , and thus prone to the phenomenon of cavitation , whirlpool .