TY  - EJOU
AU  - Aabid, Abdul 
AU  - Khan, Sher Afghan 
AU  - Baig, Muneer 

TI  - Numerical Analysis of a Microjet-Based Method for Active Flow Control in Convergent-Divergent Nozzles with a Sudden Expansion
T2  - Fluid Dynamics \& Materials Processing

PY  - 2022
VL  - 18
IS  - 6
SN  - 1555-2578

AB  - 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.
KW  - Base pressure; supersonic flow; CFD; mach number; microjet control

DO  - 10.32604/fdmp.2022.021860