Heat Transfer Design for Bionic Surfaces in a Simplified Transition Segment of Marine Gas Turbine Combustor

摘要

Gas turbine is a widely-used propulsion device for power convection in marine dynamical system. Conventional coolants such as impingement cooling and thermal protection material have lower convective heat transfer efficiency on the target surface which can hinder the development of marine gas turbine combustor. In this paper, impact cooling simplification models are established, which have simulated the function of the transition segment of marine gas turbine combustor to be protected from high temperature. Being enlightened by the butterfly scale, four types of bionic ribs are designed on the simplification models. During the analysis, conservation equations for mass, momentum and energy are solved by using finite volume method with Realizable k?ε turbulence model. By comparing the four types bionic ribs models, the surface with Type 3 rib structure has the best cooling efficiency. The results show that the sharp corner and unequal length fins of bionic rib could affect the cooling efficiency. The inspire application of the bionic structures will provide a reference for new cooling structure design in marine gas turbine combustor.