水力式升船机组合阀流量比优化研究

Flow ratio optimization of combined valves in hydro-driven ship lift

景洪水力式升船机阀门段采用“并列三阀+矩形突扩体”的布置形式,目前组合阀流量分配暂无科学的指导依据。以景洪水力式升船机为依托,建立阀门段三维数值模型,研究组合阀不同流量比下的阀门段流场特性。结果表明,三阀联合运行时,突扩体内流场均匀度最佳;三阀联合运行时,主辅阀流量比为31时,流场内最低压力最高、最大流速最小、紊动较弱,最有利于抑制空化;组合阀合理流量比与流量系数比正相关,景洪工程组合阀较优的主辅阀流量比约为31。

The layout of“parallel three valves+rectangular sudden expansion”is adopted in the valve section of Jinghong hydro-drvien ship lift.At present,there is no scientific guiding basis for the flow distribution of the combined valves.In this paper,based on Jinghong hydro-drvien ship lift,a three-dimensional numerical model of valve segment is built to study the flow field characteristics under different flow ratios of combined valves.The results show that the flow field uniformity of joint operation of three valves is the best.When the flow ratio of valves is equal to 31,the lowest pressure in the flow field is the highest,the maximum velocity is the lowest,the turbulence is weak,and the cavitation is best inhibited.The reasonable flow ratio of combined valves is positively correlated with the flow coefficient ratio.The optimal flow ratio of the main and auxiliary valves is approximately equal to 31 for combined valves in Jinghong project.