| Citation: | ZHANG Xingyuan, AI Yanting, TIAN Jinhu, et al. Analysis and design study on the structural performance of new flow tube grate tooth seal for high altitude table[J]. Journal of Aerospace Power, 2025, 40(10):20230653 doi: 10.13224/j.cnki.jasp.20230653 |
A new flow tube grate tooth sealing structure model of high-altitude table was built based on the heat-fluid-solid coupling method. Simulation and experimental studies of the sealing characteristics were carried out. The influence of the design gap on the sealing performance and contact wear of grate teeth was revealed. The gap was optimized by response surface methodology. Finally, the structural performance before and after optimization was analyzed comparatively. The study showed that the error between the simulation and experimental results of the leakage volume did not exceed 9.2%. Taking the remaining clearance not exceeding 0.1 mm as the optimization condition, the front-end design clearance of 1.9 mm was obtained, the seal design clearance was 0.75 mm, and the back-end design clearance was 2.1 mm. After optimization, the leakage of grate tooth seal structure was
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