| Micro-lattice structures demonstrate remarkable potential for thermal protection in hot-end components of aeroengines,
gas turbines, and hypersonic propulsion systems, owing to their high surface-to-volume ratio, superior flow disturbance capability, and
lightweight characteristics. Focusing on truss-type lattice structures and triply periodic minimal surface (TPMS) lattice structures, this
article systematically introduces their definitions, design methodologies, and flow and heat transfer mechanisms. Key factors affecting their
thermofluidic performance and corresponding optimization strategies are also summarized. Additionally, the article reviews the progress of
their applications in aeroengine hot-end component cooling and thermal protection for leading edges of hypersonic vehicles. Advancements
in additive manufacturing provides process guarantee for the precise forming of complex micro-lattice structures. Specifically, truss-type
lattice structures significantly enhance heat transfer performance compared to conventional cooling structures by inducing complex vortices
through intersecting ligaments, though accompanied by increased flow pressure losses. TPMS lattice structures, owing to their continuous
smooth surface morphology and flexible design freedom, demonstrate highly efficient and precise cooling regulation capabilities when
integrated with optimization algorithms. Current research has preliminarily elucidated the flow and heat transfer characteristics of typical
lattice structures under standard operating conditions. Future studies should prioritize the optimization design methodologies for gradient
lattice structures, the impacts of complex high-temperature environments and rotational effects on their flow-heat transfer performance,
and the synergistic enhancement mechanisms between lattice structures and other cooling technologies, to advance the engineering applica?
tion of micro-lattice structures in aerospace thermal protection systems. |