Annals of the Assembly for International Heat Transfer Conference 13

ISBN 1-56700-225-0 / CD 1-56700-226-9

Year 2006

S. R. Candane
Department of Mechanical Engineering, Indian Institute of Technology Madras, Chennai, India

C. Balaji
Department of Mechanical Engineering, Indian Institute of Technology Madras, Chennai, India

S. P. Venkateshan
Department of Mechanical Engineering, Indian Institute of Technology Madras, Chennai, India

The present study involves a computational fluid dynamic (CFD) analysis of a Mach 2 nozzle (The inlet to the nozzle is subsonic and the fluid leaves the nozzle at a Mach number of 2) and a design for an active cooling system. The problem as such is conjugate. The solver used is a coupled implicit solver with second order formulation including Menter's k-ω model. The coolant kerosene passes through the channels, bored in the walls of the nozzle, at a pressure of 40 bar. The channels carrying the coolant are rectangular and the nozzle is investigated by considering it to be made of nickel chromium alloy C-263 (which is used widely in aerospace applications) as well as ultra high temperature ceramics (UHTC-ZrB₂). An investigation is also carried out by considering the C-263 walls to be coated with a thin layer (0.25mm) of Zirconia. The CFD analysis of the nozzle is by considering the wall to be of solid metal and the inner wall heat fluxes are determined. The heat fluxes thus estimated are set as boundary conditions for designing the active cooling system. The solver used for designing the cooling system is a coupled implicit solver with Re-normalized Group (RNG) k-ε model. This method is adopted as it is not possible to analyse the entire nozzle and cooling system simultaneously owing to computational limitations. The results obtained for the nozzle without cooling compares well with the results of Rodriguez and Cutler (2003).

EQP-16 pages DOI: 10.1615/IHTC13.p22.160 Download article

Article price - $35.00

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