摘要
高航速时喷水推进器进流导管背部流动发生分离,加剧了喷泵的进流畸变,导致推进性能下降。本文提出在进流管上布置射流旋涡发生器(VGJ)抑制进流管的流动分离,并通过数值模拟分析了射流孔位置、射流角度、射流流量等射流参数对控制效果的影响。经参数优选后,布置在背部流动分离点前的VGJ、射流角度10°、射流流量是出流流量的2.3%时,进流管出流的不均匀度系数、旋流度、总压畸变指数分别降低35.18%,60.62%,46.42%,总压恢复系数提高了18.07%。VGJ的流动控制作用明显,工况适应性较好,为喷水推进器采用主动流动控制提升推进性能提供理论依据。
Flow separation occurs on the ramp wall of a waterjet propulsor intake duct at high navigation speed,which aggravates the inflow distortion in the pump face and lowers the propulsion performance.In this pa-per,vortex generator jet(VGJ)was arranged on the intake duct to suppress the ramp flow separation.The infec-tion of jet parameters of hole location,inclination angle and mass flow on the control effect were studied by nu-merical simulation.Through sequential parameter optimization,the VGJ was arranged to be located before the ramp separation point with the inclination angle of 10°and the jet mass flow was 2.3%of the outflow.The outflow nonuniformity coefficient,swirl degree,and total pressure distortion coefficient of the intake duct were reduced 35.18%,60.62%,46.42%,respectively.The total pressure recovery coefficient increased 18.07%.The VGJ con-figuration was proven to be effective over a wide IVR range.This paper validates a successful technique of active flow control to improve the waterjet propulsion performance.
作者
周盈盈
陈榴
罗佳巍
ZHOU Ying-ying;CHEN Liu;LUO Jia-wei(School of Energy and Power Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)
出处
《推进技术》
EI
CAS
CSCD
北大核心
2023年第8期261-268,共8页
Journal of Propulsion Technology
基金
国家自然科学基金(52006147,52276034)
喷水推进技术重点实验室基金(6142223190102)。
