Phase evolution of flow controlled by synthetic jets over NACA 0025 airfoil

被引：14

作者：

Yang, Eric ^{[1
]}

Ekmekci, Alis ^{[2
]}

Sullivan, Pierre E. ^{[1
]}

机构：

[1] Univ Toronto, Mech & Ind Engn, Toronto, ON M5S 3G8, Canada

[2] Univ Toronto, Inst Aerosp Studies, Toronto, ON M3H 5T6, Canada

来源：

JOURNAL OF VISUALIZATION | 2022年 / 25卷 / 04期

基金：

加拿大自然科学与工程研究理事会;

关键词：

Flow visualization; Particle image velocimetry; Aerodynamics; Flow control; Synthetic jet actuators; REATTACHMENT; ACTUATION; PIV; FREQUENCY;

D O I：

10.1007/s12650-021-00824-5

中图分类号：

TP39 [计算机的应用];

学科分类号：

081203 ; 0835 ;

摘要：

The phase evolution of a separated boundary layer whose separation has been delayed using synthetic jet flow control is presented. Particle Image Velocimetry measurements were made for four control cases corresponding to high and low momentum addition with excitation frequencies targeting the shear-layer and wake instabilities. Coherent structures resulting from this control, their evolution and effect on the wake development are visualized. The excitation frequency of the synthetic jets and the strength of the synthetic jets significantly affect the response of the phase-averaged shear layer, leading to distinct mechanisms of separation delay. Increasing the frequency or the jet strength increases the length of the reattached flow.

引用

页码：751 / 765

页数：15