Effect of nozzle jet flow on runway stream parameters

When present-day fighter with vector nozzle takes off, the very high temperature and very high velocity of the nozzle jet flow is increasingly damaging to the runway. We presented our research results on the effect of nozzle jet flow on runway stream parameters. Our theoretical study utilizes many well known and mature theoretical tools such as three-dimensional Navier-Stokes equations, Reynolds-averaged unsteady flow, Baldwin-Lomax algebraic turbulence model, finite volume method and Runge-Kutta time stepping schemes. Our rather extensive but still limited computed results give two preliminary but important conclusions: (1) the highest temperature and the highest velocity of jet flow on the runway occur at points very near each other; (2) the highest temperature on the runway increases rapidly and nearly linearly with increasing vector angle.