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通过对大型 E级燃气轮机的内部性能计算、应力、裂纹计算 ,掌握了机组的性能、流动数值模拟计算、温度和应力计算结果 ,为全面掌握燃机内部性能提供了依据。根据裂纹情况统计分析 ,提出了以叶片损坏区间百分比为特征值的统计方法。统计和计算表明 ,燃机叶片启动、运行一段时间后出现裂纹属于正常情况 ,但通过适当减少启动次数和机组在高温下的运行时间可以推迟裂纹出现的时间和减少裂纹数量。对项目研究结果进行了讨论和应用展望分析 ,主要包括统计结果、计算结果的应用和机组状态评估讨论
Through the calculation of internal performance, stress and crack of a large-scale E-class gas turbine, the performance of the unit, numerical simulation of flow, temperature and stress calculation results are grasped, which provides a basis for fully grasping the internal performance of the gas turbine. According to the statistical analysis of cracks, a statistical method based on the percentage of blade damage interval is taken as the eigenvalue. Statistics and calculations show that it is normal for gas turbine blades to start up and crack after a certain period of operation. However, by appropriately reducing the number of starts and running time of the unit at high temperature, the occurrence of cracks and the number of cracks can be delayed. The project research results are discussed and applied prospect analysis, including the statistical results, the application of the calculation results and the discussion of the unit status evaluation