体积力虚拟盘代替泵喷推进器叶片数值模拟及验证  

Numerical simulation and verification of bulk force virtual disk instead of pump jet propeller blade

作　　者：张锐 ZHANG Rui(Department of Warship Command,China Coast Guard Academy,Ningbo 315000,China)

机构地区：[1]武警海警学院舰艇指挥系,浙江宁波315000

出　　处：《舰船科学技术》2023年第15期34-40,共7页Ship Science and Technology

基　　金：武警海警学院2020年院级科研项目。

摘　　要：对采用泵喷推进器的水下航行器进行操纵性预报时,对真实推进器几何进行网格划分并求解时面临的计算周期长、计算开销大的问题。为提高求解效率、简化计算模型,提出采用体积力虚拟盘体代替推进器叶片几何的方法。在准稳态假设的基础上,不考虑航行器的机动运动对流场的影响,通过对航行器推进器的耦合流场进行稳态数值模拟,并对缩比模型拖曳试验,研究航行器推进器的耦合流场特性;在此基础上获得推进器包括定子、转子和导管在内的力矩系数、推力系数与进速系数之间的关系,进一步以虚拟盘体代替推进器叶片几何造型,建立简化仿真模型,通过等效变换方法求解虚拟盘体尺寸参数,对体积力虚拟盘替代推进器叶片情况下推进器的推进能力进行了仿真模拟。仿真结果表明,在误差允许条件下,体积力盘体替代真实叶片得到的数值模拟结果和实验值、实际叶片几何数值模拟仿真结果均比较接近,总推力误差和转矩误差均能控制在5%以内,结论替代方案用于操纵性预报具有较强的可行性。When predicting the maneuverability of an underwater vehicle with pump jet thrusters,the problems of.long calculation period and high computational cost are faced while the real thruster geometry is meshed and solved.In order to improve the solution efficiency and simplify the calculation model,a method of replacing the propeller blade geometry with a virtual disk of body force is proposed.On the basis of the quasi-steady-state assumption,without considering the influence of the maneuvering motion of the vehicle on the flow field,a steady-state numerical simulation of the coupled flow field of the vehicle's propulsion is carried out,and the tow test of the scaled model is carried out as well to obtained the coupled flow field characteristics of the propeller.On this basis,the relationship between the torque coefficient,thrust coefficient and advance coefficient of the propeller including the moving blade,the stationary blade and the duct is obtained.Further,the virtual disk is used to replace the propeller blade geometry,a simplified simulation model was established,the size parameters of the virtual disk were solved by the equivalent transformation method,and the propulsion capability of the thruster was simulated when the virtual disk was replaced by the body force.The simulation results show that,under the condition of error tolerance,the numerical simulation results obtained by replacing the real blade with the body force disc are relatively close to the experimental value and the numerical simulation results of the actual blade geometry,and the total thrust error and torque error can be controlled within 5%.The alternative scheme is feasible for maneuverability prediction.

关 键 词：泵喷推进 体积力 敞水性能 操纵性 数值模拟 

分 类 号：U661.33[交通运输工程—船舶及航道工程]