Study of Supersonic Flow around Tandem
Cavities

Jayanta Sinha; Neelakshi Kumar; Aaradhya Kaul

doi:https://doi.org/10.14445/22315373/IJMTT-V48P544

International Journal of Mathematics Trends and Technology

Research Article | Open Access | Download PDF

Volume 48 | Number 5 | Year 2017 | Article Id. IJMTT-V48P544 | DOI : https://doi.org/10.14445/22315373/IJMTT-V48P544

Study of Supersonic Flow around Tandem Cavities

Jayanta Sinha, Neelakshi Kumar, Aaradhya Kaul

Citation :

Jayanta Sinha, Neelakshi Kumar, Aaradhya Kaul, "Study of Supersonic Flow around Tandem Cavities," International Journal of Mathematics Trends and Technology (IJMTT), vol. 48, no. 5, pp. 292-296, 2017. Crossref, https://doi.org/10.14445/22315373/IJMTT-V48P544

Abstract

Two dimensional numerical simulations were conducted to investigate the supersonic flow around tandem cavities with front wall inclinations in both cavities and alternately inclining the front wall of each cavity at 90° and 120°. The unsteady simulations of the four models were conducted in ANSYS WORKBENCH using Reynolds Averaged Navier Stokes (RANS) equation with the k-ω turbulence model. Open cavities were considered with aspect ratio of the first cavity 3 and the second cavity 1. The Mach number was taken as 2 and Reynolds number as 4.5 x 105 . The cavities are characterised by unsteady flow due to the formation of vortices caused by shear layer interaction with cavity internal flow and formation of oblique shocks and expansion shocks. From the study it is observed that aft cavity flow behaviour is dependent on the fore cavity’s geometry. It is also observed that slightly different flow behaviour is also observed at the rear wall of fore cavity based on the aft cavity’s geometry. Introducing inclination in the wall of the cavities, reduces the peak pressure value at rear wall of the fore cavity but increases unsteadiness. A comparison of pressure oscillations and dominant frequencies has been studied for the models considered.

Keywords

Tandem cavities, supersonic flow; front wall inclinations; k-ω turbulence model; shear layer interaction

References

[1] J Sinha, S Das, P Kumar and J K Prasad, “Computational Investigation Of Control Effectiveness On A Near Transition Open And Closed Axisymmetric Cavity” , 2014.
[2] J Sinha, S Das, P Kumar and J K Prasad , “Studies On Axisymmetric Supersonic Cavity With Front Wall Inclination” , 2014.
[3] K.Mohri and R.Hilier, “Computational And Experimental Study Of Supersonic Flow Over An Axisymmetric Cavities”, 2011.
[4] J.E. Rossiter, “Wind Tunnel Experiments On The Flow Over A Rectangular Cavities At Subsonic And Transonic Speed”, 1964. [5] Heller and Bliss, “The physical mechanism of flow-induced pressure fluctuations in cavities and concepts for their suppression”, 1975
[6] K.Krishanamurty, “Acoustic Radiation From Two Dimensional Rectangular Cut-Outs In Aerodynamic Surfaces” , 1955.
[7] V Sarohia, “Experimental Investigation Of Oscillations In Flows Over Shallow Cavities”, AIAA Journal, 15(7), 1977.
[8] Chel Hun Woo, Jae Soo Kim, Kyung Hwang Lee, “Analysis Of Two Dimensional And Three Dimensional Supersonic Turbulence Flow Around Tandem Cavities” , 2006.
[9] Xin Zhang, John A. Edwards, “Experimental Investigation Of Supersonic Flow Over Two Cavities In Tandem” , 1992.
[10] Selin Aradag, Hyung Jo Kim and Doyle D. Knight, “Two And Three Diensional Simulations Of Supersonic Cavity Configurations”, 2010
[11] Chung-Jen Tam Paul D. Orkwis and Peter I. Disimile, “A Comparison Of Several Standard Turbulence Models For 2-D Open Cavity Flow Field Computations“, 1995
[12] V. Sridhar, S.L Gai and H. Kleine, “A Numerical Investigation of Supersonic Cavity Flow at Mach 2”, 2012
[13] P. Nayyar, G. N. Barakos and K. J. Badcock, “Analysis and Control of Weapon Bay Flows”, 2005
[14] Ö. H. Ünalmis, N. T. Clemens, and D. S. Dolling, “Cavity Oscillation Mechanisms in High-Speed Flows”, 2004
[15] Hongbo Wang, Mingbo Sun, Ning Qin, Haiyan Wu, Zhenguo Wang, “Characteristics of Oscillations in Supersonic Open Cavity Flows”, 2012
[16] Kegerise, M.A., “An Experimental Investigation of Flow-Induced Cavity Oscillations”, 1999
[17] Stephen J. Lawson and George N. Barako, “Passive Control of Transonic Cavity Flow”, 2008
[18] N. Zhuang, F. S. Alvi, M. B. Alkislar, and C. Shih, ”Supersonic Cavity Flows and Their Control”, 2006
[19] 20. Zhang,X.and Edwards,J., “An Investigation Of Supersonic Oscillatory Cavity flows Driven By Thick Shear Layers”, 1990
[20] D. Rockwell, E. Naudascher, “Review-Self-Sustaining Oscillations Of Flow Past Cavities”, 1978.