Abstract:
Based on dredging thermal protection method, an integrated leading edge structure was proposed to accommodate the severe heat flux and high heat flux gradient at the stagnation point. Considering the heat and force loadings, a thin shell structure with internal working medium was designed. Under thermal heating conditions, phase change and circulation of the working medium were established to achieve rapid heating transportation for the stagnation zone. The structure was integrated and then charged with working medium, and finally verified in flight test. The results showed that it started at about 94.5 s, and the thermal dredging efficiency achieved 23.4%.
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