| Citation: | HOU Shengwen, WANG Qiang, HU Haiyang, et al. Numerical simulation of influence of heat shield structure on nozzle wall cooling[J]. Journal of Aerospace Power, 2025, 40（1）：20230111 doi: 10.13224/j.cnki.jasp.20230111
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Using the axisymmetric nozzle under the afterburner as the research object, the effects of flanging methods of heat shield on nozzle cooling were studied numerically. The results show that regardless of whether the heat shield is flanged on both sides or at the outlet, the maximum and average temperatures of the heat shield show a pattern of first decreasing and then increasing with the increase of flanging height; flipping both sides of the heat shield can increase the average and maximum temperatures of the convergent section wall. On the contrary, outlet flanging can reduce the maximum and average temperatures of the convergent section wall; in case of flanging on both sides, the maximum and average wall temperatures of the divergent section can be reduced by up to 2.6% and 1.1%. During outlet flanging, the maximum and average temperatures of the divergent section wall are greatly affected, and can be reduced by up to 14.6% and 23.5%, respectively. When the cooling of the nozzle divergent section wall is taken as the research objective, the outlet flanging is more conducive to the cooling of the nozzle wall.
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