基于多核并行计算的超燃冲压发动机一维模型实时性研究

在发动机控制系统设计中，为了缩短设计周期、降低研发成本，需要建立面向控制的、较为精确的、实时性高的超燃冲压发动机性能计算模型，以保证模型精度、提高计算速度为研究目标，基于多核高性能计算仿真平台，开展了面向控制的超燃冲压发动机一维模型实时性优化工作。运用简化计算流程、改进C语言程序、开拓缓存区等方法有效提高了一维模型计算速度。创新性地尝试了计算流体力学并行化方法，对隔离段和燃烧室一维模型进行结构分解。计算网格平衡分配至多个中央处理器，并借助核间数据通讯实现多核并行计算。与串行模型计算结果对比，七核并行计算模型性能参数偏差不超过0.1%，全工况仿真时间小于30ms，计算耗时较优化前缩短了75%以上。实时性优化后的多核并行模型计算精度高、速度快、收敛性好，可以作为超燃冲压发动机控制系统设计和半实物仿真验证平台。

Real-Time Research of Scramjet One Dimensional Model Simulation Based on Multi-Core Parallel Computation

In the engine control system design, in order to shorten the design cycle of control system and reduce the cost of research and development, it is necessary to establish a good real-time scramjet engine model oriented to control. In order to ensure the model accuracy and improve the calculation speed, the real-time optimization of one-dimensional scramjet model for control was carried out based on the multi-core high-performance computing simulation platform.Firstly,?the calculation speed of one-dimensional model was improved effectively by simplifying the calculation process, improving the C language program and expanding the cache area. Subsequently, the computational fluid dynamics parallelization method was tried innovatively, which decomposed the one-dimensional model of isolation section and combustor. The computing grids distributed multiple central processors in a balanced way and realized multi-core parallel computing with the help of inter-core data communication.Compared with the calculation results of the serial model, the deviation of the performance parameter of the seven-core parallel calculation model?is less than 0.1% and the calculation time of the whole working condition is less than 30ms, and the calculation time is shortened by more than 75% compared with that before optimization. After real-time optimization, this parallel model has high computational accuracy, fast computation speed, good convergence, and can be used as a platform for scramjet control system design and hardware-in-the-loop simulation verification.