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- W2347866880 abstract "We carry out numerical simulations to investigatethe effect of nozzle divergence angle on back flow ofplume expansion into rarefied atmosphere.Results areobtained using open source compressible computationalfluid dynamics (CFD) solver.Non-equilibrium slip andjump boundary conditions for velocity and temperature areimplemented to capture rarefaction rarefaction effects inthe slip flow regime. The solver has been validated withthe experimental data for a nozzle flow in the slip flowregime. We explore the non-linear non-equilibrium gas flowphysics of a supersonic jet expansion. We report results ofpressure, heat and drag coefficients for different divergentangles (120,150and200) at 80 km altitude conditions. Theslip based results for heat loads significantly under-predictthe no-slip ones, while for pressure and drag coefficients,deviations are found to be minute. It is noticed that thrustcoefficient of nozzle increases with increase in divergenceangle, however, nozzle with divergent angle of150led tominimum drag and heat transfer load on the critical region.The current study is important from the perspective of theoverall aero-thermodynamic design of a typical supersonic rocket model operating under rarefied conditions." @default.
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- W2347866880 date "2015-01-01" @default.
- W2347866880 modified "2023-09-29" @default.
- W2347866880 title "Effect of Nozzle Divergence Angle on Plume Expansion InOuter-Space Conditions" @default.
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