Radiation effects on ignition delay and flame spread in solid propellant rocket motors

Prasanna, TR and Jegannath, M and Sulthan Ariff Rahman, M and Natarajan, V and Sankar, V and Sanal Kumar, VR (2018) Radiation effects on ignition delay and flame spread in solid propellant rocket motors. In: 54th AIAA/SAE/ASEE Joint Propulsion Conference, 2018, 9 - 11 July 2018, Cincinnati, Ohio.

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Abstract

Abstract Numerical studies have been carried out to examine the radiation effects on ignition delay and flame spread in solid rocket motors with uniform and non-uniform port geometry. Parametric analytical studies have been carried out using 2d transient, double precision, pressure-based, species, SST k-omega turbulence model. In the numerical study, a fully implicit finite volume scheme of the compressible Navier–Stokes equations is employed. As a part of the code validation and calibration, the numerically predicted boundary-layer blockage at the Sanal flow choking condition for channel flows is verified using the closed-form analytical model of V.R. Sanal Kumar et al. (AIP Advances, 8, 025315, 2018) and found excellent agreement with the exact solution. Detailed studies have been carried out to examine the influence of port geometry on the surface heat flux distribution, with and without radiation effects. We observed through the parametric studies that the radiation effect is having more significant effect in SRMs with non-uniform port geometry than uniform port cases with respect to its ignition delay and overall flame spread interval. The numerical results presented in this paper is useful for the ignition transient studies of high performance solid propellant rocket motors with non-uniform port geometry.

Item Type:	Conference Paper
Publication:	2018 Joint Propulsion Conference
Publisher:	American Institute of Aeronautics and Astronautics Inc, AIAA
Additional Information:	The copyright for this article belongs to the American Institute of Aeronautics and Astronautics Inc, AIAA.
Keywords:	Boundary layers; Geometry; Heat flux; Ignition; Incompressible flow; Navier Stokes equations; Propulsion; Radiation effects; Rocket engines; Rockets; Solid propellants; Turbulence models, Analytical studies; Finite volume schemes; Ignition transient; K-Omega turbulence model; Numerical results; Solid propellant rocket motor; Solid rocket motors; Surface heat flux distribution, Flame research
Department/Centre:	Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering)
Date Deposited:	10 Aug 2022 11:15
Last Modified:	10 Aug 2022 11:15
URI:	https://eprints.iisc.ac.in/id/eprint/75756

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