Numerical Simulations of Subsonic and Transonic Open-Cavity Flows

2014 ◽  
Author(s):  
Yiyang Sun ◽  
Aditya G. Nair ◽  
Kunihiko Taira ◽  
Louis N. Cattafesta ◽  
Guillaume A. Brès ◽  
...  
Keyword(s):  
Numerical Simulations ◽  
Open Cavity ◽  
Cavity Flows

Characteristics of Oscillations in Supersonic Open Cavity Flows

2012 ◽  
Vol 90 (1) ◽  
pp. 121-142 ◽  
Author(s):  
Hongbo Wang ◽  
Mingbo Sun ◽  
Ning Qin ◽  
Haiyan Wu ◽  
Zhenguo Wang
Keyword(s):  
Open Cavity ◽  
Cavity Flows

Three-dimensional instabilities over a rectangular open cavity: from linear stability analysis to experimentation

2014 ◽  
Vol 748 ◽  
pp. 189-220 ◽  
Author(s):  
J. de Vicente ◽  
J. Basley ◽  
F. Meseguer-Garrido ◽  
J. Soria ◽  
V. Theofilis
Keyword(s):  
Three Dimensional ◽  
Reynolds Numbers ◽  
Linear Analysis ◽  
Main Flow ◽  
Open Cavity ◽  
Flow Structures ◽  
Cavity Flows ◽  
Final State ◽  
Wave Properties ◽  
Final Expression

AbstractThree-dimensional instabilities arising in open cavity flows are responsible for complex broad-banded dynamics. Existing studies either focus on theoretical properties of ideal simplified flows or observe the final state of experimental flows. This paper aims to establish a connection between the onset of the centrifugal instabilities and their final expression within the fully saturated flow. To that end, a linear three-dimensional modal instability analysis of steady two-dimensional states developing in an open cavity of aspect ratio $L/D=2$ (length over depth) is conducted. This analysis is performed together with an experimental study in the same geometry adding spanwise endwalls. Two different Reynolds numbers are investigated through spectral analyses and modal decomposition. The physics of the flow is thoroughly described exploiting the strengths of each methodology. The main flow structures are identified and salient space and time scales are characterised. Results indicate that the structures obtained from linear analysis are mainly consistent with the fully saturated experimental flow. The analysis also brings to light the selection and alteration of certain wave properties, which could be caused by nonlinearities or the change of spanwise boundary conditions.

Surface Roughness Benefits in Open Cavity Flows

2022 ◽  
Author(s):  
Ganesh Nampelly ◽  
Ananth Sivaramakrishnan Malathi ◽  
Nagabhushana Rao Vadlamani ◽  
Sriram Rengarajan ◽  
Konstantinos Kontis
Keyword(s):  
Surface Roughness ◽  
Open Cavity ◽  
Cavity Flows

On the Flow Physics of Effectively Controlled Open Cavity Flows

2013 ◽  
Author(s):  
Lawrence Ukeiley ◽  
Louis Cattafesta
Keyword(s):  
Open Cavity ◽  
Cavity Flows ◽  
Flow Physics
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