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Effect of inlet flow condition on regression rate and self-sustained combustion of solid fuel ramjet
Received date: 2015-06-02
Revised date: 2015-07-30
Online published: 2015-08-03
In order to investigate the influence of inlet flow condition on regression rate and self-sustained combustion of solid fuel ramjet, a 2d axisymmetric turbulent flow and combustion program is developed. The equation is solved using MUSCL reconstruction method and AUSMPW+ flux splitting technique, with k-w shear stress transport (SST) turbulence model, 7 species/3 reaction kinetics finite rate model and second-order moment turbulence-chemistry model. The simulation results show that the increases of air mass rate and total temperature enhance the regression rate and the exponents for them are 0.95-1.00 and 0.67. The variation of regression rate for different inlet flow conditions is caused by the variation of temperature and turbulent viscosity while turbulent viscosity is the predominant factor. Characteristic velocity decreases with the increase of air mass rate. The characteristic velocity is about 850 m/s and combustion could not sustain when the Mach number at inlet reaches about 1.
GONG Lunkun , CHEN Xiong , ZHOU Changsheng , LI Yingkun , ZHU Min . Effect of inlet flow condition on regression rate and self-sustained combustion of solid fuel ramjet[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2016 , 37(5) : 1428 -1439 . DOI: 10.7527/S1000-6893.2015.0212
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