Numerical investigation on the effect of g-load on high-g ultra-compact combustor

Abstract

High-g combustion technology belongs to ultra-compact combustion technology. g-load is an important dimensionless parameter that affects the combustion performance of high-g ultra-compact combustors. In this paper, the numerical simulation method is used to indirectly and qualitatively analyze the relationships between the g-load and combustion results by studying characteristics including flow field, temperature field structure, combustion efficiency, and outlet temperature distribution. Research shows that reducing the radial incidence angle or increasing the primary and secondary flow ratios can increase g-load. The overall flow rate, temperature and the combustion efficiency in the combustion chamber will increase with the primary and secondary flow ratios because the combustion reaction will be promoted. There is an optimal radial incidence angle to make the combustion reach the optimal state. Increasing or decreasing the angle can affect the combustion negatively. The research results are beneficial to further study of the compact interstage combustor.