摘要
风扇叶片脱落并行计算结果的一致性非常重要。在共享内存并行(SMP)模式下,由于计算随机误差和误差累积现象的存在,计算结果可能不一致。针对该问题,对某型大涵道比涡扇发动机简化的三叶片模型进行并行仿真计算,分析造成计算结果不一致的误差来源,提出四种控制策略,研究表明,通过计算方法的改进和计算平台的选择可以有效避免误差累积现象,提高并行计算精度。
The parallel computing consistency for Fan Blade Out（FBO） is very important. Under the shared-memory parallel（SMP） mode, due to random error and calculate error cumulative, the results may be inconsistent. The threeblade containment analysis model of high bypass ratio turbofan engine was adopted as a parallel simulation example to analyze the reason of error caused by inconsistent. And four control strategies were advanced. The investigation showed that, by properly setting up the calculation algorithms and platform, the accumulated errors can be reduced, and consistency of the multiple processor calculation can be significantly improved.
出处
《航空科学技术》
2015年第2期68-73,共6页
Aeronautical Science & Technology
基金
航空科学基金(2012ZBN2003)
国家自然科学基金(51205377)
上海市科委项目(12DJ1400500)~~
关键词
航空发动机
风扇叶片脱落
机匣
包容性
并行计算
一致性
数值仿真
aero engine
fan blade out（FBO）
case
containment
parallel computing
consistency
numerical simulation
