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Characterising low-speed, transitional cavity flow

Published online by Cambridge University Press:  27 January 2016

Y. T. Ng
Y. T. Ng*
Affiliation:
Advanced System Department, Singapore Technologies Aerospace Ltd, Singapore
*
yowthye@stengg.com
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Extract

In various studies involving subsonic transition cavity flows, terms like ‘transitional-open’ and ‘transitional-closed’ cavity flow regimes are used in the literature. However, the exact fluid dynamic criteria to distinguish them have not been firmly established. The present work attempts to clarify this. Experiments to measure static pressure and fluctuating pressure distribution in a rectangular cavity with length-to-depth (L/D) ratio of 3 to 20 were performed. Based on pressure measurements on the front, bottom and rear faces of the cavity, additional criteria are established to clearly distinguish the range of critical L/D (or (L/D)cri) where these different transitional cavity flow regimes occur. The present work ascertains that the (L/D)cri for open and transitional-open cavity flow is 6·0-6·5, for transitional-open and transitional-closed cavity flow is 9-10 and for transitional-closed and closed cavity flow is 14-15. Flow visualisation qualitatively supports the flow pattern in the different cavity flow regimes.

Type
Research Article
Information
The Aeronautical Journal , Volume 116 , Issue 1185 , November 2012 , pp. 1185 - 1199
Copyright
Copyright © Royal Aeronautical Society 2012 

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References

1. Roshko, A. Some Measurements of Flow in a Rectangular Cutout, NACA Tech Note 3488, August 1955.Google Scholar
2. Rossiter, J.E. Wind Tunnel Experiment on the Flow over Rectangular Cavities at Subsonic and Transonic Speeds, Reports and Memoranda, 3438, British Aeronautical Research Council, 1966.Google Scholar
3. Heller, H.H., Holmes, D.G. and Covert, E.E. Flow-induced pressure oscillations in shallow cavities, J Sound and Vibration, 1971, 18, 4, pp 545–553.Google Scholar
4. Yu, Y.H. Measurement of sound radiation from cavities at subsonic speeds, J Aircr, 1977, 14, (9), pp 838–843.Google Scholar
5. Rockwell, D. and Naudascher, E. Review-self sustaining oscillations of flow past cavities, transactions of the ASME, June 1978, 100, pp 152–165.Google Scholar
6. Ukeiley, L. and Murray, N. Velocity and surface pressure measurements in an open cavity, Experiments in Fluids, 2005, 38, pp 656–671.Google Scholar
7. Chatellier, L., Laumonier, J. and Gervais, Y. Theoretical and experimental investigations of low Mach number turbulent cavity flows, Experiments in Fluids, 2004, 36, (5), pp 728–740.Google Scholar
8. Grace, S.M., Dewar, W.G. and Wroblewski, D.E. Experimental investigation of the flow characteristics within a shallow wall cavity for both laminar and turbulent upstream boundary layers, Experiments in Fluids, 2004, 36, pp 791–804.Google Scholar
9. Savory, E., Toy, N., Disimile, P.J. and Dimicco, R.G. The drag of three-dimensional rectangular cavities, Applied Scientific Research, May 1993, 50, 3-4, pp 325–346.Google Scholar
10. Ashcroft, G. and Zhang, X. Vortical structures over rectangular cavities at low speed, Physics of Fluids, 17, 015104, 2005.Google Scholar
11. Özsoy, E., Rambaud, P., Stitou, A. and Riethmuller, M.L. Vortex characteristics in laminar cavity flow at very low Mach number, Experiments in Fluids, 2005, 38, pp 133–145.Google Scholar
12. Pereira, J.C.F. and Sousa, J.M.M. Influence of impingement edge geometry on cavity flow oscillations, AIAA J, 1994, 32, (8), pp 1737–1740.Google Scholar
13. Rowley, C.W. and Williams, D.R. Dynamics and control of high Reynolds number flow over open cavities, Annual Review of Fluid Mechanics, 2006, 38, pp 251–276.Google Scholar
14. Plentovich, E.B., JrStallings, R.L. and Tracy, M.B. Experimental Cavity Pressure Measurements at Subsonic and Transonic Speeds: Static-Pressure Results, NASA Technical Paper 3358, December 1993, p 80.Google Scholar
15. JrStallings, R.L. and JrWilcox, F.J. Experimental Cavity Pressure Distributions at Supersonic Speeds, NASA Technical Paper 2683, June 1987, p 77.Google Scholar
16 Luo, S.C. and Gan, T.L. Correction of distortion in fluctuating pressure signal caused by long pressure transmitting PVC tubing, J Institute of Engineers Singapore, 1991, 31, pp 33–35.Google Scholar
17 Okamoto, S., Misutani, Y. and Yamasaki, T. Flow in Two-dimensional Rectangular Cavities, Transactions of the Japan Society of Mechanical Engineers, Part B, February 2002, 68, 666, pp 384–392 (in Japanese).Google Scholar
18. Gai, S.L. and Sharma, S.D. Pressure Distributions behind a Rearward Facing Segmented Step, Experiments in Fluids, 1987, 5, (3), pp 154–158.Google Scholar