Analysis of Heat Transfer Characteristics of a Heat Exchanger Based on a Lattice Filling

In response to the heat load requirements of high-thrust liquid rocket engine, a light-weight lattice structure is used fill traditional exchanger. A parameterized model library established, and relative density adjusted by changing unit cell parameters obtain different filling structures. comprehensive comparison exchangers with structures performed in terms weight, transfer efficiency, turbulence intensity. Using finite difference method, numerical calculation non-steady heat–fluid–solid coupling conjugate eight-lattice performed, dynamic process between oxygen simulated using VOF SST k-? model. The results show that pressure fluid exchanger increases increasing density, leading high outlet temperature greatly velocity. support trusses close wall obviously hinder flow oxygen, resulting sudden change rate behind trusses, driving high-temperature at bottom move upwards. direction porosity have greater impact on rate, which turn affects performance consideration exchanger, star-type lattices are When fully developed, volume ratio heated 85.60%, 390 K, meets design requirements.