（1. China Academy of Aerospace Aerodynamics, Beijing 100074, China） (2. Research Institute of Aerospace Materials and Processing Technology, Beijing 100076, China)
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DOI:
10.7502/j.issn.1674-3962.2013.04.05
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Abstract:
Heat protection is an important technology in hypersonic flight reentry, the light weight cellular ablator is a kind of materials which is used to heat protection usually. In ground test the free flow supersonic stagnation ablation is an effective method to estimate the ablation performance of material. In the large scale flatsurface stagnation ablation test, the heat flux in the ablation surface is not uniform, so that the result of the ablate test is not absolutely correct, but the equal heat flux of sphericalsurface design can solve the problem efficaciously. In this paper, the method and the equipment of the stagnation ablation test is introduced particularly, meanwhile the engineering arithmetic and the theory of heat flux measurement is shown briefly, subsequently the ablation result which is affected by the flatsurface mode seriously is emphasized, whereafter according to the results of test and simulation the sphericalsurface model that can improve the heat flux uniformity of ablation surface is mentioned, at last through the contrastive experiment, the different result of measurement and test between the flat and spherical model is analyzed in detail, and a larger error of ablation in flatsurface model is explained.