不同转速下微型推进器水动力特性数值研究  

Numerical study on hydrodynamic characteristics of micro-thruster at different rotational speeds

作　　者：黄强[1] 陈猛飞 袁建平[2] 王彪彪 司乔瑞[2] HUANG Qiang;CHEN Mengfei;YUAN Jianping;WANG Biaobiao;SI Qiaorui(Tianjin Branch of China Petroleum and Chemical Co.,Ltd.,Tianjin 300271,China;Research Center of Fluid Machinery Engineering and Technology,Jiangsu University,Zhenjiang 212013,China)

机构地区：[1]中国石油化工股份有限公司天津分公司,天津300271 [2]江苏大学流体机械工程技术研究中心,江苏镇江212013

出　　处：《流体机械》2021年第7期7-13,共7页Fluid Machinery

基　　金：国家自然科学基金项目(51976079);江苏省产学研合作项目(BY2019059)。

摘　　要：微型喷水推进器是一种利用喷射水流产生的反作用力来驱动设备前进的推进器。为了分析推进器转速对其水动力特性的影响,基于k-ε模型对微型推进器在2000,2500,3000,3500,4000 r/min 5个转速下全流场进行数值模拟。利用数理统计学中的最小二乘法等方法对推进器的推力、功率等水动力特性与转速的关系进行分析。结果显示:推力与转速的二次方成正比,功率与转速的三次方成正比;叶轮的导边部分受力和流动损失最大,尾流区存在一对旋转方向相反的非对称旋涡,且强度随着转速增大而增大。本文为微型推进器的结构设计和优化提供了参考和理论基础。The miniature water jet thruster is a kind of thruster which uses the reaction force produced by the jet flow to drive the equipment forward.In order to analyze the influence of thruster speed on its hydrodynamic characteristics,the full flow field of the micro thruster at 2000,2500,3000,3500 and 4000 r/min was numerically simulated respectively based on the k-εmodel.The relationship between the hydrodynamic characteristics of the thruster such as the thrust and power and the rotational speed was analyzed using the least square method in mathematical statistics.The results show that the thrust is proportional to the quadratic power of the rotational speed,and the power is proportional to the cubic power of the rotational speed;the force and flow loss of the guide edge of the impeller is the largest,and there is a pair of asymmetric vortices with opposite rotating direction in the wake region,and the intensity increases with the increase of the rotational speed.The present research provides a reference and theoretical basis for the structural design and optimization of micro-thruster.

关 键 词：推进器 水动力特性 转速 流场 数值模拟 

分 类 号：TH3[机械工程—机械制造及自动化]