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In order to research the impact on the surrounding environment of the high temperature and high pressure jet flow produced in the process of missile vertical launching with jet vane, the structured grids was built, and the computational fluid dynamic model was used to simulate the launching vehicle jet flow. The temperature and pressure contour of the deflector and baffle was obtained. The results shows that the ablation on the deflector was obvious, and the high temperature area was distributed by X shape. By comparing the actual experiment, we found the calculation of the simulation was reasonable, and it provided a reference for the follow study. Introduction The missile vertical launching has the characteristics of simple and quick[1], it is widely used in many kinds of missile launch. The high temperature and high pressure jet flow produced in the process of missile vertical launching will cause severe ablation and impact[2], now we use the deflector to lead the jet flow. Jet vane is a kind of missile control plane[3], at the beginning of the missile launching, it was used to control the initial wheel for the missile. With the impact of the jet vane, the jet flow produced by the nozzle will be impeded. The document[4] has studied the effect for the plane of the jet flow produced by solid rocket motor. The document[5]shows the impact of jet flow during the process of the concentric canister launching. The document[6]has studied the temperature distribution of the jet flow during the process of the concentric canister launching by numerical simulation. Now the study of the jet flow with jet vane is little. Physical Model Three-dimensional N-S equation is used for the numerical simulation; the Control Equations[7]are shown as follow: Continuum equations is shown as follow ( ) 0 i u t ρ ρ ∂ +∇⋅ = ∂ (1) Momentum equations is shown as follow i i i ( ) ( ) p u p u v F t x ρ ρ ∂ ∂ +∇ ⋅ = − + ∂ ∂   (2) Energy equations is shown as follow ( ) div( ) div( grad ) T p T k T T S t c ρ ρ ∂ + = + ∂ u (3) Where, ρ is flow density, i u is flow velocity in i direction, v  is velocity vector, p is the flow

Research on vertical launching missile jet flow with jet vane