英语翻译水击是压力管道中一种非恒定流动,当管道中的介质在压力的作用下流动时,突遇关闭或开启阀门,水泵突然停机或启动,液体

英语翻译
水击是压力管道中一种非恒定流动,当管道中的介质在压力的作用下流动时,突遇关闭或开启阀门,水泵突然停机或启动,液体的流动速度会突然发生变化.由于流体的惯性和压缩性,引起管道中流动的液体压力发生反复的、急剧的周期性变化.
通常发电厂中水泵的启停和阀门的动作都会引起水击现象,对管道及其联接设备的安全构成威胁.但在火电厂运行中,各个部位发生水击现象的原因又有所不同.如蒸汽管道、汽包、给水管道、省煤器、锅炉放水管、分汽缸及加热器等部位的水击现象和发生原因及处理方法都是各不同的.因此,采取有针对性的水击防护措施是有必要的.目前已经有了很多防护措施,大体可分为安装水击防护装置、优化运行操作、合理布置管道等.
在热力发电厂的运行中,经常会发生汽水管道的水击现象,如果处理不当,管道的水击轻者增大了管道的流动阻力,重者损坏管道及设备,甚至危及人生安全.因此对汽水管道水击现象的防范处理对保证热力发电厂的安全经济运行具有重要意义.

请采纳,我没有用软件.Water hammer pressure pipeline in an unsteady flow, when the medium in the pipe under the action of the pressure flow, an opening or closing the valve, the pump suddenly stops or starts, the liquid flow velocity will suddenly change. As the fluid inertia and compressibility, causing the liquid flowing in the pipeline pressure occurs repeatedly, sharp cyclical changes.
Usually the power plant water pump starting and stopping movement of the valve will cause the phenomenon of water hammer in pipeline, and its connection device security threat. But in the operation of thermal power plant, all occurs the phenomenon of water hammer and the reason of different. Such as steam pipe, water pipe, boiler, economizer, water tube boiler, cylinder and heater and other parts of the water hammer phenomenon and reasons and treatment methods are different. Therefore, to take the water hammer protection measures are necessary. There have been many protective measures, can be roughly divided into the installation of water hammer protection device, optimize operation, reasonable layout of pipeline.
In thermal power plants in operation, frequent pipeline water hammer phenomenon, if processing is undeserved, pipeline water hammer will increase the pipeline flow resistance, heavy damage to the pipeline and equipment, even endanger the life safety. The pipeline water hammer prevention treatment to guarantee the safe and economic operation of the thermal power plant has important significance.