摘要
航空发动机燃烧室(ACC)内燃气具有最高温度、压力和速度。因此,燃烧室机匣一旦破裂,带来灾难性后果的概率很大。本文对航空发动机燃烧室机匣在极端工况下的破裂安全性进行研究,采用Neuber法、工程弹塑性法和真实弹塑性法对燃烧室机匣内压载荷下的应力应变分别进行数值仿真分析,并与试验结果进行对比分析,明确了这三种方法各自的优势和使用限制。对比结果表明,真实弹塑性法在高应力区域预测及强度高裕度区域预测方面,与试验测量结果具有相对最高的一致性,更适合于机匣安全性分析。
If the Aero-engine Combustor Case （ACC） , which provides the constraint of the gas with the highest pressure, temperature and speed in the aero-engine, met a failure, it would fairly probably cause disastrous effects. This paper researched the burst security of ACC under the ultimate load case, Neuber method, engeering elastic- plastic method and real elastic-plastic method were respectively used to calculate the stress and strain of ACC under inner gas pressure, the results were compared with the test result, and the merits and constraints of each were described. The comparison result shows that real elastic-plastic method is most suitable in the three for ACC burst security analysis, since it has the highest agressment with the test in terms of high stress area prediction and high stress margin area prediction.
作者
杨眉
许璠璠
宁宝军
朱琳
Yang Mei;Xu Fanfan;Ning Baojun;Zhu Lin(AECC Commercial Aircraft Engine CO., LTD., Shanghai 200241, China)
出处
《航空科学技术》
2018年第5期18-24,共7页
Aeronautical Science & Technology
