| Citation: | ZHAO Hongliu, SUN Mingrui, JIANG Nan, et al. Design and experimental study of S-type foam metal tube-fin heat exchanger[J]. Journal of Aerospace Power, 2023, 38（4）：840-849 doi: 10.13224/j.cnki.jasp.20210219
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In order to solve the problem of thermal protection and thermal management of aero-engine components, for CCA (cooled cooling air) technology, high-porosity foam metal was used to replace the metal fins of traditional tube-fin heat exchangers, and a lightweight, efficient, and small size S-type foam metal tube-fin heat exchanger was designed. The heat exchanger core made of 3D printed titanium alloy, with weight of 129 g, was composed of S-shaped tube bundles and foamed metal fins. The fins were installed at the straight pipe section of the tube bundle. The flow heat transfer experiment simulated the air-oil heat exchanger outside the casing of an aero engine, with water on the cold side and high temperature air on the hot side. The flow rate, inlet and outlet temperature and pressure of the fluid on both sides were measured. The results showed that: for the fin of the heat exchanger, the heat transfer coefficient increased by 43.94%, the heat transfer increased by 21.7%, the comprehensive heat transfer performance increased by 25.43%, and the power-to-weight ratio increased by 17.26% on average, reaching 14.61 kW/kg. This showed that the metal foam can improve the overall performance of the heat exchanger and can be used in the design of heat exchangers with similar structures for future aero-engines.
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