Study Of Transient Flow About Pressurized Water Current Impacting Trapped Air Mass

It is likely to appear a phenomenon of pressurized flow impacting trapped airmass for variety reasons in ductwork of hydropower stations,water pumping stationand pumped storage power stations. After the in-depth investigation and research onthe present research situation of pressurized flow impacting trapped air mass at homeand abroad, the author believe that water behind ball clique can produce pressurewhich come from it. Thereby, trapped air mass is, changing senior person had usedtester of largely identical but with minor differences, placed solely in close pipelinebase on examination. The close pipeline is called windpipe or ballonet at this article.The windpipe can circumvolve three hundreds and sixty degree in upright surface,which can analyzed the pressure influence coming from water behind ball clique bychanging angle of windpipe, Basing on above mentioned model, it will be researchedfrom three aspects at this paper: firstly, by cleaning up and studying data of modelexperimentation, it was analyzed that gas content, ball clique closure time, ball cliqueending degree of closure and windpipe setting angle influent the pressurized flowimpacting trapped air mass. secondly, based on the analysis and research of seniorperson, the author have educed elastic and rigid water-hammer mathematics model. Ithad proved that the elastic and rigid water-hammer mathematics model is feasible bycontrasting experimentation data and numerical value calculating data. thirdly, to fixquantify analysis and research for rigid water-hammer mathematics model, itconcludes that how much gas content and how big setting angle will influent how bigtrapped air mass pressure. To make the research result easy to be used in practice, asoftware is developed in this paper.