Numerical Investigation on the Jet Characteristics and the Heat and Drag Reductions of Opposing Jet in Hypersonic Nonequilibrium Flows

We adopted the transient numerical method for simulation of an ELECTRE vehicle with opposing jet at altitude 53.3 km and 13 Ma to explore characteristics as well performance in heat drag reductions hypersonic nonequilibrium flows. The time-accurate, N-S equations coupled five-species Park chemical kinetic model vibrational energy excitation were applied, open source solver Hy2FOAM based on OpenFOAM platform was adopted. Three jets different radii (R7 jet, R14 R21 jet) investigated. results show that increasing flow rate, mode a small radius varies from overflow long penetration (LPM) finally short (SPM), while large directly changes SPM. state is stable, whereas SPM LPM, it unstable. investigation R7, R14, shows except can provide effective thermal protection, protection enhanced rate. Moreover, both LPM effectively reduce aerodynamic drag, but cannot reduction. has better effect, contributes