Abstract
Jet from wall orifice is the simplest and commonest way of injection in the scramjet engine. The mixing characteristics and total pressure loss of jet in supersonic crossflow (JISC) are very complex but important to the combustion in chamber and the performance of scramjet engine. In order to evaluate the mixing and total pressure characteristics of the JISC, the nanoparticle-based planar laser scattering method (NPLS) technology and CFD methods are employed to study the penetration and total pressure loss of the JISC. The influences of jet to mainstream dynamic pressure ratio and injection angle are evaluated by dimensionless penetration depth and total pressure recovery coefficient. The curves of penetration and recovery coefficient depending on different dynamic pressure ratios are fitted according to the scatter plot extracted from experimental and numerical results. But the characteristics of JISC due to injection angle perform so complex that the penetration depth and total pressure recovery coefficient should be combined together to estimate the influence of injection angle.
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