Numerical simulations of mixing under supercritical pressures of a shear coaxial injector using a high-order method: effect of outer jet temperature

Abstract

A three-dimensional (3D) simulation of N 2 /H 2 mixing for a coaxial injector under a supercritical pressure of 10 MPa is conducted using a highorder numerical method. Two outer H 2 jets with injection temperatures of approximately 52 and 462 K are applied while an inner N 2 jet with an injection temperature of approximately 97 K is applied. The mean and §uctuation properties and instantaneous §ow ¦elds are discussed in order to characterize the detailed mixing features for the two injection conditions. A clear dependence of dense-core length on the momentum §ux ratio is also demonstrated.