不同围压下自激吸气式脉冲射流装置性能试验研究  

Experimental Research on Performance of Self-excited Inspiratory Pulsed Jet Device under Different Ambient Pressures

作　　者：高传昌[1] 黄晓亮[1] 赵礼[1] 杜俐[1] 

机构地区：[1]华北水利水电学院,河南郑州450011

出　　处：《应用基础与工程科学学报》2011年第6期971-977,共7页Journal of Basic Science and Engineering

基　　金：水利部公益性行业科研专项经费项目(200801011);国家自然科学基金资助项目(50379013)

摘　　要：针对深水水库泥沙处理技术问题和需求的迫切性,运用自行研制的试验装置对不同围压(模拟不同水深)下的自激吸气式脉冲射流装置性能进行了试验,研究分析了工作压力、围压、靶距对脉冲射流冲击力的影响,并对装置吸气量的变化及启动吸气压力进行了初步分析.结果表明,脉冲射流冲击力随工作压力的增加而增大,随围压和靶距的增加而减小;装置吸气量随工作压力的增加而增大,增大的速度随围压的不同而不同,并逐渐趋于稳定;启动吸气压力随围压增加而增大,且表现出一定规律性.研究结果为进一步深入研究自激吸气式脉冲射流及其在水库清淤等工程应用方面提供依据.To address the technical problems of mud processing of deep water reservoirs and meet the urgent needs, experiments were conducted to assess the performance of a self-excited inspiratory pulsed jet device under different ambient pressures with testing device developed by ourselves, i a which the influence of the driving pressure, ambient pressure and standoff distance on the impact force of pulsed jet were analyzed. Preliminary research on the change of inspiratory quantity and start-up inspiratory pressure was also carried out. As the experimental results demonstrate,the pulsed jet impact force increases with the increase of driving pressure, but decreases with the increase of ambient pressure and standoff distance;the inspiratory capacity increases as driving pressure increases, at a speed varying according to the stimulus of ambient pressure,and becomes stable gradually; start-up inspiratory pressure increases as ambient pressure increases ,exhibiting certain regularity. The experiment provides basis for the in-depth study on self-excited inspiratory pulsed jet and its application in projects like reservoir desilting.

关 键 词：围压 自激吸气 脉冲射流 冲击力 吸气量 启动吸气压力 

分 类 号：TV136[水利工程—水力学及河流动力学]