Computation of heat transfer in exothermically reacting rheological hypergolic gel fuels for rocket propulsion systems

Beg, OA ORCID:, Beg, TA, Kadir, A, Leonard, HJ, Zubair, A, Jouri, WS and Gorla, RSR 2020, Computation of heat transfer in exothermically reacting rheological hypergolic gel fuels for rocket propulsion systems , in: ICAMET 2022 : 16th International Conference on Aero-mechanical Engineering & Technology, 21-22 March 2022, Dubai, United Arab Emirates. (In Press)

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In recent years spacecraft engineers have been actively developing novel rocket fuels for improved combustion performance and longer duration burn times. Numerous studies have shown the potential benefits of gelled fuels and oxidizers. The NASA Lewis Research Center and its partners have investigated O2 /H2 /Al and O2 /RP-1 /Al for NASA missions and conducted experimental programs to validate elements of the combustion and fuel technology. Gelled and metallized gelled hydrogen and RP-1 have been emphasized since hydrogen and RP-1 are typical propellants for NASA launch vehicles and upper stages. Hypergolic gelled fuels such as Monomethyl-hydrazine (MMH) and red fuming nitric acid (RFNA) feature strong rheological characteristics which are essential for their optimized function. Motivated by more accurately characterizing the non-Newtonian heat transfer in such hybrid gel fuels, in the present work, a pseudo-spectral numerical method is employed to study the steady, laminar, incompressible flow and heat transfer in a cylindrical conduit containing viscoelastic hypergolic gel fuel. Convective cooling is included. The exothermic reaction is modeled using Arrhenius kinetics and a third grade non-Newtonian Rivlin-Ericksen (“differential” fluid) model is employed to simulate viscoelastic effects. The dimensionless momentum and energy conservation equations are solved under appropriate boundary conditions. The effects of viscoelastic parameter (), activation energy parameter (), Frank-Kamenestskii parameter (), Biot number (Bi), viscous heating parameter (m) on velocity and temperature evolution in the regime are studied in detail. Excellent correlation between the present pseudo-spectral simulations and Hermite-Padé solutions from the literature is obtained. Further validation is included using Maple quadrature and a MATLAB-based variational iteration method (VIM). The study has important applications in hybrid aerospace propulsion systems utilizing hypergolic reactive gels, and further confirms the excellent stability and adaptability of pseudospectral and variational iteration techniques in simulating such flows.

Item Type: Conference or Workshop Item (Paper)
Schools: Schools > School of Computing, Science and Engineering
Journal or Publication Title: ICAMET 2022: 16th International Conference on Aero-Mechanical Engineering and Technology
Publisher: World Academy of Science, Engineering and Technology (WASET)
Depositing User: OA Beg
Date Deposited: 18 Apr 2020 11:12
Last Modified: 16 Feb 2022 04:26

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