向前射流对圆柱绕流影响的数值研究  

Numerical Study on Effect of Forward Jets on Flow past Circular Cylinder

作　　者：孙丽萍[1] 付国强 戴绍仕[1] 陆程 SUN Liping;FU Guoqiang;DAI Shaoshi;LU Cheng(Harbin Engineering University,Harbin 150001,China)

机构地区：[1]哈尔滨工程大学船舶工程学院,哈尔滨150001

出　　处：《船舶工程》2018年第9期97-101,共5页Ship Engineering

摘　　要：文章对前驻点带有射流的圆柱绕流问题进行研究,采用有限元求解器进行二维数值模拟。在圆柱前驻点布置单缝式射流口,沿来流反方向,向前射流以影响圆柱的绕流流场。通过比较有无射流时圆柱涡旋脱落的不同效果,研究射流对圆柱绕流的影响机理。改变射流速度的大小,比较不同射流速度下,圆柱受力以及涡旋脱落的变化。结果显示,在一定的射流速度范围内,向前射流可以有效控制圆柱的涡旋脱落,并减小圆柱受力。The problem of flow past a fixed circular cylinder with jets located at the front stagnation point is studied in the paper. A FEM solver is applied to make the 2 D numerical simulation. The jets are generated to influence the flow field around the cylinder from a gap at the front stagnation point with the reverse direction of the incoming flow. Different effects of vortex shedding from the cases with and without jets are compared to research the influence mechanism. The force on the cylinder and the vortex shedding off the cylinder are varied as the jet velocity is changed. The result shows that the forward jets are able to control the vortex shedding and reduce the force of the cylinder effectively within a certain range of jet velocity.

关 键 词：前驻点 射流 圆柱 涡旋脱落 受力 

分 类 号：U661.43[交通运输工程—船舶及航道工程]