摘要
为提高喷水推进器的推进性能,本文将气体射流应用于螺旋混流泵喷管中,研究喷管掺气对推进性能的影响。采用混合模型分别对不同掺气长度、掺气深度、掺气量进行数值模拟,设计响应面试验并运用多目标规划寻找最优掺气模型,对比优化后模型与原始模型内流场。结果表明:螺旋混流泵加入气体射流后可以大幅增加推力,但会降低系统效率;在其他掺气参数不变的情况下,推力与掺气长度、掺气量成正相关,与掺气深度成负相关;以推力为目标进行优化,相比不掺气模型推力提升了1.75倍;以推力和效率为目标进行多目标优化,推力相比不掺气模型提升了1.61倍,效率相较于只优化推力时提升了2.9%;掺气后液体流道面积减小,喷管进出口压差变大,流速增加导致推力增大。
To improve the propulsion performance of water jet thrusters,a gas jet was applied to the nozzle of a spiral mixed-flow pump to examine the effect of nozzle aeration on propulsion performance.Using a hybrid model,numerical simulations were conducted on different aeration lengths,depths,and volumes.Response surface experiments were designed,and multi-objective programming was used to determine the optimal aeration model.The flow field inside the optimized model was compared to that of the original model.The results show that adding a gas jet can substantially increase the thrust of the screw mixed-flow pump,although it reduces the system′s efficiency.When other aeration parameters remain unchanged,thrust is positively correlated with the length and volume of aeration and negatively correlated with the depth of aeration.When optimized for thrust,the thrust increased by 1.75 times compared to the original model.Multi-objective optimization,targeting thrust and efficiency,resulted in a 1.61-times increase in thrust and a 2.9%improvement in efficiency compared to optimizing thrust alone.After aeration,the liquid flow channel area decreases,and the pressure difference between the nozzle inlet and outlet increases,leading to higher thrust.
作者
韩伟
贺春沛
李仁年
徐梓添
张钰昆
HAN Wei;HE Chunpei;LI Rennian;XU Zitian;ZHANG Yukun(School of Energy and Power Engineering,Lanzhou University of Technology,Lanzhou 730050,China;Key Laboratory of Advanced Pumps,Valves and Fluid Control System of the Ministry of Education,Lanzhou University of Technology,Lanzhou 730050;Key Laboratory of Fluid Machinery and Systems in Gansu Province,Lanzhou 730050,China)
出处
《哈尔滨工程大学学报》
北大核心
2025年第9期1793-1800,共8页
Journal of Harbin Engineering University
基金
国家自然科学基金项目(52269022,52179086)
中央引导地方发展项目(23ZYQA0320).
关键词
螺旋混流泵
气体射流
推进性能
响应面分析
多目标规划
内流场
涡特性
Ω准则
spiral mixed-flow pump
gas jet
propulsion performance
response surface analysis
multi-objective planning
internal flow field
vortex characteristics
Ωcriterion
