Abstract: Metallic honeycomb sandwich structure is one of the major substructures in the reusable metal thermal projection system (MTPS). The thermal field of metallic honeycomb plate in flows with energy addition was computed. For typical metallic honeycomb kind of TPS, the numerical model of honeycomb core was constructed. The numerical simulation was based on fluid-solid coupling method. Two phase flow model and solidification/melting model were used to simulate the scouring effect. Physical process of laser ablation was described commendably with this method. The results of the thermal field and morphologies are presented in this paper, which indicate that the two phase flow numerical method can well simulate convective heat Transfer, solidification/melting of metallic honeycomb structures and dynamic action of metallic liquid under air flow scouring.