基于沟槽结构的泵喷推进器导管脉动压力控制研究  

Pulsating pressure control of pumpjet propulsor ducts with groove structures

作　　者：叶金铭[1] 吴原润 孙大鹏 邹笑宇 YE Jin-ming;WU Yuan-run;SUN Da-peng;ZOU Xiao-yu(Department of Naval Architecture Engineering,Naval University of Engineering,Wuhan 430033,China)

机构地区：[1]海军工程大学舰船与海洋学院,武汉430033

出　　处：《船舶力学》2024年第2期191-203,共13页Journal of Ship Mechanics

基　　金：国家自然科学基金资助项目(51579243)。

摘　　要：本文借鉴航空发动机中的压气机“处理机匣”技术,在泵喷推进器导管内壁开设一定数量的轴向沟槽结构,用于减弱泵喷推进器的梢涡,从而减小泵喷推进器导管内壁上的脉动压力。结合分离涡模拟(DES)方法和滑移网格方法对椭圆形水翼的梢涡流场进行数值模拟,数值计算结果与试验值吻合度较高,验证了数值计算方法的可靠性与适用性。在此基础上,分别对有无沟槽结构的泵喷推进器进行数值模拟,对比分析沟槽结构对梢涡涡核压力、导管内壁脉动压力和水动力性能的影响。结果表明:沟槽结构可以显著增大梢涡涡核压力,并对导管内壁面上脉动压力幅值有明显的降低效果,且对水动力性能影响较小。Based on the concept of‘casing treatment’technology in aero-engine,a certain number of axial groove structures were set up in the inner wall of a pumpjet propulsor duct to weaken the tip vortex intensity,so as to reduce the pulsating pressure on the inner wall of the duct.By applying DES method and sliding mesh method,the flow around tip vortex field region of an elliptical hydrofoil was numerically simulated.The numerical calculation results are in good agreement with the experimental values,which verifies the reliabili⁃ty and applicability of the numerical calculation method.On this basis,the numerical simulations of the pump⁃jet propulsor with and without groove structures were carried out,and the effects of groove structure on the tip vortex core pressure,the pulsating pressure on the inner wall of the duct and hydrodynamic performance were compared and analyzed.The results show that the groove structures can significantly increase the tip vortex core pressure,reduce the amplitude of fluctuating pressure on the inner wall of the duct,and has little effect on the hydrodynamic performance.

关 键 词：泵喷推进器 沟槽结构 梢涡 脉动压力 

分 类 号：U664.3[交通运输工程—船舶及航道工程]