多参数优化设计对喷水推进组合体水力性能的影响  

Influence of multi-parameter optimization design on hydraulic performance of water-jet propulsion assembly

作　　者：张岩 王路逸 钟锦情 龙云[3] ZHANG Yan;WANG Luyi;ZHONG Jinqing;LONG Yun(Science and Technology on Water Jet Propulsion Laboratory,Marine Design&Research Institute of China,Shanghai 200011,China;School of Naval Architecture,Ocean and Civil Engineering,Shanghai Jiaotong University,Shanghai 200240,China;Natio-nal Research Center of Pumps,Jiangsu University,Zhenjiang,Jiangsu 212013,China)

机构地区：[1]中国船舶工业集团公司第七〇八研究所喷水推进技术重点实验室,上海200011 [2]上海交通大学船舶海洋与建筑工程学院,上海200240 [3]江苏大学国家水泵及系统工程技术研究中心,江苏镇江212013

出　　处：《排灌机械工程学报》2021年第7期655-662,共8页Journal of Drainage and Irrigation Machinery Engineering

基　　金：国家自然科学基金青年基金资助项目(51906085);中国博士后科学基金面上资助项目(2019M651734);浙江省博士后科研基金资助项目。

摘　　要：通过调整轴支架的叶片数、轴支架叶片出口安放角、轴支架与叶轮间距、叶顶间隙等参数对喷水推进组合体的性能进行优化设计,利用CFD对某型喷水推进组合体的流场进行数值模拟,分析不同几何结构参数对喷水推进泵性能的影响.结果表明:随着轴支架叶片数的增大,扬程、效率、功率曲线整体都呈下降趋势;当轴支架叶片数与叶轮相等时,扬程与功率曲线骤降;当轴支架叶片出口安放角为[-25°,25°]时,随着出口安放角增大,扬程曲线与效率曲线呈线性上升的趋势;随着喇叭管外径长度增大,入口面积变化减小,扬程与效率曲线逐渐下降后趋于平缓,随后又略有上升,功率的变化整体上呈下降趋势;随着轴支架与叶轮间距的增大,扬程曲线逐渐上升后趋于平缓,功率变化规律和扬程变化规律一致,效率曲线先上升后下降;随着叶顶间隙增大,叶轮做功效率下降,扬程、效率及功率曲线都呈下降趋势.该研究结果可提高喷水推进组合体的水动力性能,对促进喷水推进技术的发展具有较大的应用价值,为喷水推进组合体的优化设计提供了一定依据.Water-jet propulsion pump was optimized by adjusting the shaft strut blade number,the shaft strut blade outlet angle,the distance between the shaft strut and the impeller,and the tip clea-rance.The flow field of a certain type of water-jet propulsion assembly was simulated by CFD,and the influence of different geometric structure parameters on the performance of water-jet propulsion pump was analyzed.The results show that with the increase of the number of blades,the curves of head,efficiency and power gradually are in a downward trend.When the blade number of the shaft strut and the blades is equal to that of impeller,the head and power curve will suddenly drop.When the blade outlet angle of the shaft strut is within the range of[-25°,25°],the head curve and the efficiency curve show a linear upward trend with the outlet angle of the blade increase.With the increase of the outer diameter length of the suction tube,the entrance area variation decreases,the curve of the head and efficiency gradually decreases,then tends to be flat,and finally increases,and the change of the power shows a downward trend.With the increase of the distance between the shaft strut and the impeller,the head curve gradually rises and then tends to be flat,the power change law is consistent with the head change law,and the efficiency curve first increases and then decreases.With the increase of tip clearance,the work efficiency of the impeller decreases,and the head,efficiency and power curves all show a downward trend.The research results can improve the hydrodynamic performance of the water-jet propulsion assembly,which has great application value to promote the development of the water-jet propulsion technology,and provides a certain basis for the optimization design of the water-jet propulsion assembly.

关 键 词：喷水推进组合体 几何参数 轴支架 水力性能 

分 类 号：S277.9[农业科学—农业水土工程] U661.3[农业科学—农业工程]