detonationFoam: An open-source solver for simulation of gaseous detonation based on OpenFOAM

Detonation has promising applications in advanced propulsion systems, and numerical simulation is widely used to gain insights into the complex interaction between the hydrodynamic flow and chemical reactions involved in detonation. In this work, detonationFoam, an open-source solver for accurate and efficient simulation of compressible reactive flow and detonation are developed based on OpenFOAM. detonationFoam can simulate compressible, multi-component, reactive flow and it can accurately evaluate the detailed transport coefficients using the mixture-averaged transport model. Compared to rhoCentralFoam, the improved HLLC-P approximate Riemann solver is used in detonationFoam and it helps to accurately resolve shock waves appearing in detonation. Besides, the adaptive mesh refinement and dynamic load balancing algorithms are used in detonationFoam, which greatly improves the computational efficiency. Validation tests including homogenous ignition, unsteady diffusion, shock tube problem, premixed flame, planar detonation, double Mach reflection, detonation cellular structure and oblique detonation wave are conducted. These tests demonstrate that detonationFoam can be used to accurately and efficiently to simulate the compressible, multi-component reactive flow and detonation processes.

爆轰在先进推进系统中具备极具潜力的应用前景，数值模拟则被广泛用于深入剖析爆轰过程中流体动力流动与化学反应之间的复杂相互作用。本研究基于OpenFOAM平台，开发了一款可精准高效模拟可压缩反应流与爆轰现象的开源求解器detonationFoam。该求解器能够对可压缩多组分反应流进行模拟，并可借助混合平均输运模型精准计算详细输运系数。相较于rhoCentralFoam，detonationFoam采用了改进型HLLC-P近似黎曼求解器，可精准捕捉爆轰过程中出现的冲击波。此外，detonationFoam集成了自适应网格细化与动态负载均衡算法，大幅提升了计算效率。本研究开展了涵盖均匀点火、非定常扩散、激波管问题、预混火焰、平面爆轰、双马赫反射、爆轰胞格结构以及斜爆轰波在内的多项验证测试。测试结果表明，detonationFoam可精准且高效地模拟可压缩多组分反应流与爆轰过程。