基于CFD高精度算法的雷电电磁场研究

doi:10.7527/S1000-6893.2021.26366

Abstract

Abstract: Lightning space electromagnetic field has always been a hot topic in the electromagnetic field. Mature algorithms such as the Finite-Difference Time-Domain (FDTD), Transmission-Line Modeling (TLM) and frequency domain Method of Moments (MoM) have a wide range of applications in computing lightning problems. Since the Euler equation in Computational Fluid Dynamics (CFD) and the Maxwell equation in electromagnetics have the same conservation form and the Discontinuous Galerkin (DG) method has been widely tried in the flow field problem, a DG method based on CFD is proposed to discretize the time domain Maxwell equation. The grid partition parallel technology is used to accelerate the calculation, and the DG-based spherical RCS example is used for testing. The numerical results show the feasibility of the DG algorithm in solving the electromagnetic field problem. Calculation results of the electric field distribution in a near-field lightning channel are compared with those using the analytical solution and the simulation solution of a certain algorithm. The data basically agrees, showing that the method proposed is applicable for calculation of lightning electromagnetic field.

Key words: Maxwell equation, lightning electromagnetic field, DG, CFD, time domain electromagnetic field simulation

CLC Number:

V211.3

WANG Zihang, LYU Hongqiang. Research on lightning electromagnetic field based on CFD high-precision algorithm[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2021, 42(S1): 726366-726366.

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Research on lightning electromagnetic field based on CFD high-precision algorithm

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