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级间导流盘腔空气系统优化设计和数值研究

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针对航空发动机在示温漆试验中发现的燃气涡轮级间导流盘工作温度偏高的问题,通过建立完整的级间导流盘腔空气系统三维CFD模型,采用流热耦合仿真计算方法,对影响冷气沿程温升的主要因素进行了分析,并对导叶内机匣的引气孔和燃气涡轮机匣引气孔进行了优化设计和对比分析.结果表明,影响冷气沿程温升的主要因素为机匣至上缘板冲击温升、导叶前腔冷却温升和一级后导流盘腔风阻温升3部分.优化改进后,腔温和两级导流盘的温度及当量应力均大幅度降低,对强度和寿命的改善效果十分明显,并随持久试车试验完成了验证.
Optimal design and numerical study of the air system in inter-stage guide disc cavity
Aiming at the problem of the high working temperature of the guide disc in the gas turbine engine test,the three-dimensional CFD model of the air system of the guide disc cavity in the gas turbine was established and the flow-heat coupling simulation method was adopted to analyze the main factors affecting the temperature rise along the cold air.And the inlet holes in the casing were optimized and compared.The results show that the main factors of cold air temperature along in the course are the impact temperature rise of the upper rim plate of the casing,the cooling temperature rise of the front cavity of the guide vane and the rear cavity of the first stage guide disc.The temperature and the equivalent stress of the cavity and the two-stage guide plate have been greatly reduced,and the strength and service life have been greatly improved which were verified by endurance test.

aero-engineinter-stage guide disc cavityair systemoptimal designnumerical simulation

余毅、邓维、吴楠、薛树林、刘丽平

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中国航发湖南动力机械研究所,湖南株洲 412002

中小型航空发动机叶轮机械湖南省重点实验室,湖南株洲 412002

航空发动机 级间导流盘腔 空气系统 优化设计 数值模拟

2024

燃气涡轮试验与研究
中国燃气涡轮研究院

燃气涡轮试验与研究

影响因子:0.146
ISSN:1672-2620
年,卷(期):2024.37(5)