Cavity Flow Control Experiments and Simulations

22nd International Conference on Spectral Line Shapes

Vakili, A.D.^1 ; Fowler, W.L.^1 ; Loewen, R.D.^1 ; Thiemann, C.L.^1 ; Fetterhoff, T.P.^1 ; Meganathan, A.J.^2

University of Tennessee, Space Institute, Tullahoma

TN

37388, United States^1

ESI-USA, Inc., Huntsville

AL, United States^2

关键词: Adaptive methodologies;    Cavity flow control;    Control effectiveness;    Control techniques;    High frequency dynamics;    Interaction process;    Numerical results;    Pressure fluctuation;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/548/1/012068/pdf
DOI  :  10.1088/1742-6596/548/1/012068

来源: IOP

【 摘 要 】

In this work we describe a summary of flow control research studies on active, passive and adaptive methodologies designed to attenuate large scale flow unsteadiness and the resulting pressure fluctuations in cavity flows. Spectral analysis of high frequency dynamic pressure measurements is used to determine the control effectiveness. Various control techniques, depending on their geometry and or distribution, can be advantageous in attenuating both the peaks and the broad spectral bands generated by flow unsteadiness. Increased effectiveness is associated with redistribution of the shear-layer vorticity. Combination of experimental and numerical results assists in understanding the underlying flow physics and interaction processes involved.