Computational Analysis of Side Jet Interaction With a Super-sonic Cross-flow

Bhagat, A and Gijare, H and Dongari, Nishanth (2018) Computational Analysis of Side Jet Interaction With a Super-sonic Cross-flow. In: Proceedings of the 6th International and 43rd National Conference on Fluid Mechanics and Fluid Power, 15-17, December 2016, MNNITA, Allahabad, U.P., India.

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Abstract

We have numerically investigated the interaction of a side jet positioned on the small rocket, with the supersonic cross-flow. An open source CFD tool, OpenFOAM is used to model the complex flow of a jet-atmosphere interaction. The flow fields are computed by the steady 3-dimensional Navier-Stokes solver with k- ! SST turbulence model. Our solver is validated with the experimental pressure data available on the rocket wall and a systematic study is done by varying parameters like jet pressure ratio. Aerothermodynamic coefficients for various flow conditions are reported, and pitching moments and normal forces are found to vary linearly with the jet pressure ratios. Possible contamination of the on-board sensor located on the rocket wall due to impinging plumes is also examined. This study helps in designing effective missile control by selection of the location of jet and pressure ratios.

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