Improvement algorithm of wall temperature analysis for high heat load afterburner liner
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摘要:
随着加力燃烧室热负荷水平逐步提高,在有限冷气量的强约束下隔热屏冷却需开展精细化设计,现有的隔热屏壁温分析算法精度无法满足高热负荷加力燃烧室设计需求。本文针对影响加力燃烧室隔热屏壁温计算精确性的关键参数,开展了算法改进,基于改进算法,计算加力燃烧室隔热屏壁温,并与试验结果进行对比分析。改进算法的计算结果与试验结果误差不大于7%,较改进前减小8%,有效提升了高热负荷加力燃烧室隔热屏壁温的计算精度。
Abstract:As the heat load of afterburner increased, the cooling of liner required for refined design under the strong constraint of effective cold air volume. The accuracy of the liner wall temperature analysis algorithm cannot meet the development requirements of high heat load afterburner. Engineering algorithm optimization for critical parameters was carried out, which affected the accuracy of the high heat load afterburner liner wall temperature. Based on the optimized method, calculations were carried out for the wall temperature of the afterburner liner, and compared with the test values. The error between engineering design method and test results was less than 7%, and the error between evaluation results of the revised engineering algorithm and the test results decreased by 8% compared with those before the correction. The optimization method can effectively improve computation accuracy of. wall temperature for high heat load afterburner liner.
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Key words:
- afterburner /
- liner /
- wall temperature /
- aerodynamic characteristic /
- heat transfer
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