Numerical Investigation on Effect of Solid Fuel Ramjet Geometry on Solid Fuel Regression Rate

doi:10.3969/j.issn.1000-1093.2016.05.005

Abstract

Abstract: In order to investigate the influence of solid fuel ramjet geometry on regression rate of solid fuel, a 2D axisymmetric turbulent flow and combustion program is developed. The Navier-Stokes governing equations are solved by using MUSCL reconstruction method and AUSMPW+ flux splitting technique, k-w SST turbulence model, 7 species/3 reaction kinetics finite rate model and second-order moment turbulence-chemistry model. The effects of inlet diameter, grain diameter, nozzle throat diameter and geometrical similarity on regression rate are studied. The simulation results show that the inlet diameter and grain diameter affect the regression rate mostly, while geometrical similarity and nozzle throat diameter have less effect on it. The variation of regression rate is caused by the variation of turbulent viscosity and flame position directly; port-to-inlet-diameter ratio has the most important influence on regression rate, and the regression rate has a linear relation with port-inlet-diameter ratio.

Key words: ordnance science and technology, solid fuel ramjet, regression rate, geometry, port-to-inlet-diameter ratio

CLC Number:

V235

GONG Lun-kun, CHEN Xiong, ZHOU Chang-sheng, LI Ying-kun, ZHU Min. Numerical Investigation on Effect of Solid Fuel Ramjet Geometry on Solid Fuel Regression Rate[J]. Acta Armamentarii, 2016, 37(5): 798-807.

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