Abstract: A numerical method,based on single temperature sensor,constant heat flux assumed and arbitrary number future time steps,was employed to determine the heat flux during rapid cooling on high temperature surface with multiply immersed impinging water jets.The finite volume discretization method and treatment of boundary condition were presented.Validating test case indicates the proposed method can predict the angular heat flux correctly.The experimental results show that water jet impingement(induces) higher heat flux,higher critical temperature and narrower transition temperature range.