Tanmay B. B. GHOLAP, Majella Riona R., Adithya M., Deepthi Chowdary BOLLA, Devabrata SAHOO


In aviation, open cavities have a critical role in influencing performance characteristics. Components such as combustion chamber, landing gear, and weapon bays contain a cavity influenced by the shear layer. Supersonic conditions of cavity flows are a prerequisite for the configuration of missiles and future aerospace vehicles. In the present research, the stream passing above a rectangular open pit containing a shear layer is computationally studied after the impingement of an oblique shock wave generated by a wedge type shock generator. The cavity duct investigated in the present study has a length to depth ratio of 3 at zero degrees angle of attack. Investigation on the influence of flow characteristics such as the magnitude of drag, pressure distribution, and recirculation within the duct has been performed and analyzed for cases in the presence and absence of shock generator at Mach 3. No particular disruption of the shear layer occurs in the absence of an oblique shock. However, a robust recirculation in the shock impingement cases is observed. The shear layer lifts up due to the thrust force generated in the open cavity on the impingement of a shock wave. A strong rear shock is generated at the rear wall separation point of the open duct. Further, the effect of the rise in the strength of the impinging shock on the entire flow over the cavity is also investigated. As the strength of impinging shock increases, it was observed that the magnitude of pressure distribution on the cavity surface also increases.

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O. Wayne, M., Robert, W., Drag of Rectangular Cavities in Supersonic and Transonic Flow Including the Effects of Cavity Resonance, AIAA Journal 1970, 8(11), pp. 1959-1964.

J.A., E., X. Z., Some Aspects of Supersonic Flow Over a Cascade Flow, Astrodynamics Conference, August 1986, Williamsburg, VA, USA.

X., Z., J.A., E., Computational Analysis of Unsteady Supersonic Cavity Flows Driven by Thick Shear Layers, Aeronautical Journal 1988, Vol. 92(919), pp. 365-374.

O., B., R. L. Jr., S., Computational and Experimental Investigation of Cavity Flowfields, AIAA Journal 1988, Vol. 26(1), pp. 6-7.

Mark., G., Robert, B., Tarun, M., K.Y., H., Fundamental Studies of Cavity-Based Flameholder Concepts for Supersonic Combustors, Journal of Propulsion and Power, 1988, Vol. 17(1), pp. 146-153.

Clarence, R., Tim, C., Amit, B., On Self Sustained Oscillations in Two-Dimensional Compressible Flow Over Rectangular Cavities, J. Fluid Mechanics, 2002, Vol. 455, pp. 315-346.

Donald, R., Miguel, V., Large-Eddy Simulation of Supersonic Cavity Flowfields Including Flow Control, AIAA Journal, 2003, Vol. 41(8), pp. 1452-1462.

Omer, U., Noel, C., D., D., Cavity Oscillation Mechanisms in High-Speed Flows, AIAA Journal, 2004, Vol. 42(10), pp. 2035-2041.

Javier de, V., Eusebio, V., Leo, G., Vassilios, T., Spectral Multi-Domain Methods for BiGlobal Instability Analysis of Complex Flows over Open Cavity Configurations, 36th AIAA Fluid Dynamics Conference and Exhibit, 2006, San Francisco, California, USA.

Denis, S., Anton, L., Global Stabilityof Base and Mean Flows: A General Approach and its Applications to Cylinder and Open Cavity Flows, J. Fluid Mechanics 2007, Vol. 593, pp. 333-358.

Guillaume, B., Tim, C., Three Dimensional Instabilities in Compressible Flows Over Open Cavity, J. Fluid Mechanics 2008, Vol. 559, pp. 309-339.

Sanchayata, N., Sampada, L., Devabrata, S., Nandagiri, R., S.A.I., B., Computational Analysis of Novel Cavity-Based Flameholder Designs for Supersonic Combustion Engines, IOP Conference Series: Material Science and Engineering, January 2020, Vol. 814, Pandharpur, Maharashtra, India.

Sanchayata, N., Devabrata, S., Effect of a Pylon Mounted Cavity-Based Flameholder on the Combustor Flow Characteristics, Journal of Applied Fluid Mechanics 2021, Vol. 14(6), pp. 1635-1642.

Tanmay, G., Majella, R., Adithya, M., Deepthi, B., Devabrata, S., A Two-Dimensional Computational Analysis Over an Open Cavity with a Shock Impingement, IEEE Pune Section International Conference December 2021, pp.1-5.


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