Reconstructing shock front of unstable detonations based on multi-layer perceptron

作     者：Lin Zhou Honghui Teng Hoi Dick Ng Pengfei Yang Zonglin Jiang 

作者机构：School of Aerospace EngineeringBeijing Institute of TechnologyBeijing100081China State Key Laboratory of Laser Propulsion and ApplicationBeijing Power Machinery InstituteBeijing100074China Department of MechanicalIndustrial and Aerospace EngineeringConcordia UniversityMontrealQCH3G 1M8Canada State Key Laboratory of High Temperature Gas DynamicsInstitute of MechanicsChinese Academy of SciencesBeijing100190China School of Engineering SciencesUniversity of Chinese Academy of SciencesBeijing100049China 

出 版 物：《Acta Mechanica Sinica》 (力学学报（英文版）)

年 卷 期：2021年第37卷第11期

页      面：1610-1623,I0001页

核心收录：

学科分类：08[工学] 0801[工学-力学（可授工学、理学学位）] 

基　　金：This work was supported by the National Natural Science Foundation of China(Grant 11822202) 

主　　题：Cellular detonation Lead shock evolution Multi-layer perceptron Numerical simulations 

摘      要：The dynamics of frontal and transverse shocks in gaseous detonation waves is a complex phenomenon bringing many difficulties to both numerical and experimental *** laser-optical visualization of detonation structure may provide certain information of its reactive front,but the corresponding lead shock needs to be reconstructed building the complete flow *** the multi-layer perceptron(MLP)approach,we propose a shock front reconstruction method which can predict evolution of the lead shock wavefront from the state of the reactive *** method is verified through the numerical results of one-and two-dimensional unstable detonations based on the reactive Euler equations with a one-step irreversible chemical reaction *** show that the accuracy of the proposed method depends on the activation energy of the reactive mixture,which influences prominently the cellular detonation instability and hence,the distortion of the lead shock *** select the input variables for training and evaluate their influence on the effectiveness of the proposed method,five groups,one with six variables,and the other with four variables,are tested and analyzed in the MLP *** trained MLP is tested in the cases with different activation energies,demonstrates the inspiring generalization *** paper offers a universal framework for predicting detonation frontal evolution and provides a novel way to interpret numerical and experimental results of detonation waves.