Numerical Analysis of a Microjet-Based Method for Active Flow Control in Convergent-Divergent Nozzles with a Sudden Expansion  

作　　者：Abdul Aabid Sher Afghan Khan Muneer Baig 

机构地区：[1]Department of Engineering Management,College of Engineering,Prince Sultan University,Riyadh,11586,Saudi Arabia [2]Department of Mechanical Engineering,Faculty of Engineering,International Islamic University Malaysia,Kuala Lumpur,50728,Malaysia

出　　处：《Fluid Dynamics & Materials Processing》2022年第6期1877-1900,共24页流体力学与材料加工（英文）

基　　金：supported by the Structures and Materials(S&M)Research Lab of Prince Sultan University.

摘　　要：A method based on microjets is implemented to control the flow properties in a convergent-divergent nozzle undergoing a sudden expansion.Three different variants of this active control technique are explored numerically by means of a finite-volume method for compressible fluid flow:with the first one,the control is implemented at the base,with the second at the wall,while the third one may be regarded as a combination of these.When jets are over-expanded,the control is not very effective.However,when a favourable pressure gradient is established in the nozzle,the control becomes effective,leading to an increase in the base pressure.

关 键 词：Base pressure supersonic flow CFD mach number microjet control 

分 类 号：O35[理学—流体力学]