首页|Multi-scale collaborative design method for macroscopic thermal optimization and mesoscopic woven structure of hypersonic vehicle's TOCMC leading edge
Multi-scale collaborative design method for macroscopic thermal optimization and mesoscopic woven structure of hypersonic vehicle's TOCMC leading edge
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A new thermal protection design method for hypersonic vehicle's leading edge is pro-posed,which can effectively reduce temperature of the leading edge without additional cooling mea-sures.This method reduces the leading-edge's temperature by the multi-scale collaborative design of the macroscopic thermal optimization and the mesoscopic woven structures of Three-dimensional Orthogonal Woven Ceramic Matrix Composites(TOCMC).The macroscopic thermal optimization is achieved by designing different mesoscopic woven structures in different regions to create com-bined heat transfer channels to dredge the heat.The combined heat transfer channel is macroscop-ically represented by the anisotropic thermal conductivity of TOCMC.The thermal optimization multiple linear regression model is established to optimize the heat transport channel,which pre-dicts Theoretical Optimal Thermal Conductivity Configuration(TOTCC)in different regions to achieve the lowest leading-edge temperature.The function-oriented mesostructure design method is invented to design the corresponding mesostructure of TOCMC according to the TOTCC,which consists of universal thermal conductivity prediction formulas for TOCMC.These universal formu-las are firstly derived based on the thermal resistance network method,which is verified by exper-iments with an error of 6.25％.The results show that the collaborative design method can effectively reduce the leading edge temperature by about 12.8％without adding cooling measures.
NETL
NSTL
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