Computational Study of Transverse Slot Injection in Supersonic Flow

Malsur Dharavath; P. Manna; Debasis Chakraborty

doi:10.14429/dsj.68.11069

Malsur Dharavath DRDO-Defence Research and Development Laboratory, Hyderabad - 500 058
P. Manna DRDO-Defence Research and Development Laboratory, Hyderabad - 500 058
Debasis Chakraborty DRDO-Defence Research and Development Laboratory, Hyderabad - 500 058

DOI: https://doi.org/10.14429/dsj.68.11069

Keywords: Supersonic flow, Transverse slot injection, Separation distance

Abstract

The knowledge of transverse sonic injection flow field is very important for the design of scramjet combustor. Three dimensional Reynolds-Averaged Navier Stokes equations alongwith turbulence models are solved to find the effect of transverse sonic slot injection into a supersonic flow. Grid sensitivity of the results is studied for various structured grids. Simulations with different turbulence models (i.e., k-ε, k-ω, SST-kω, and RNG-kε) reveals that RNG-kε turbulence model better predicts the flow features. Computational fluid dynamics predicted wall pressure distribution for various injection pressures matches well with experimental data. The extent of upstream separated region increases with the increase of the injection pressure. The increase of slot width makes the interaction between transverse jet and free stream more intense and causes more spreading and penetration of injectant in the downstream region.

Author Biographies

Malsur Dharavath, DRDO-Defence Research and Development Laboratory, Hyderabad - 500 058

Mr Malsur Dharavath obtained his ME (Aerospace Engineering) from Indian Institute of Science (IISc), Bengaluru. He is working in the DRDO-Defence Research and Development Laboratory, Hyderabad. He has about 20 journal papers and 19 conference papers to his credit. His research areas includes: Scramjet and hypersonic propulsion system, combustion modelling, free and confined supersonic jets applicable to missile propulsion.

P. Manna, DRDO-Defence Research and Development Laboratory, Hyderabad - 500 058

Dr P. Manna obtained his PhD (Thermal Science and Engineering) from IIT, Kharagpur. Presently he is working as a Scientist in the Directorate of Computational Dynamics, DRDO-Defence Research and Development Laboratory, Hyderabad. He has published 25 journals papers and 28 conference papers. His research interests include: CFD, propulsion, heat transfer, and high-speed reacting flow.

Debasis Chakraborty, DRDO-Defence Research and Development Laboratory, Hyderabad - 500 058

Dr Debasis Chakraborty obtained his PhD (Aerospace Engineering) from Indian Institute of Science (IISc), Bengaluru. Presently, he is working as Technology Director, Computational Dynamics, DRDO-Defence Research and Development Laboratory, Hyderabad. He has about 98 journal papers and 119 conference papers to his credit. His research areas includes: CFD, aerodynamics, high speed combustion and propulsion.