摘要
在射流马赫数分别为０．２０６、０．３６１及０．８３１三种工况下，用环形卡门涡街激励射流。对３种不同几何参数的环形卡门涡街发生器，利用总压探针分别测定了激励前后射流速度的轴向分布和径向分布，得到了射流气动参数和涡街发生器几何参数对射流激励效果的影响。还利用单丝热线分别测定了激励前后射流边界层的紊流参数，结果表明，激励之后射流边界层的紊流脉动能量显著增加，这是射流激励后吸卷能力提高的内在动力。
Jets were excited by Karman Vortex Streets under three conditions of Jet Mach Number 0 206,0 361 and 0 831.Three vortex generators with different geometries were tested.Jet Velocity distributions with and without excitation were measured by stagnation presure probe.The turbulent characteristics in the jet boundary layer were detected by a single hot wire probe.It is shown that excited jet velocity decay faster than that of unexcited jet,and turbulent energy in jet boundary layer is significantly increased by votex excitation.Therefore,jet structure can be effectively controlled by hydrodynamic excitations.
出处
《航空动力学报》
EI
CAS
CSCD
北大核心
1996年第3期309-311,共3页
Journal of Aerospace Power
基金
国家自然科学基金资助项目
关键词
激励
射流
边界层
卡门涡
Excitation Jets Boundary layer Karman vortex Control
