论文标题
两相气体播放混合物中爆炸燃烧的欧拉 - 拉格朗日模型与OpenFOAM：验证和验证
Eulerian-Lagrangian modelling of detonative combustion in two-phase gas-droplet mixtures with OpenFOAM: validations and verifications
论文作者
论文摘要
基于OpenFOAM开发了一种混合欧拉 - 拉格朗日求解器Ryrhocentralfoam，以模拟两相气体液混合物中的爆炸燃烧。对于Eulerian气相，RyrhoCentralFoam在时间和空间离散方面享有第二顺序，并且基于多面体细胞上的有限体积方法。根据OpenFOAM中的标准可压缩流量求解器RheCentralfoam进行以下开发：（1）多组分物种传输，（2）气相燃烧的详细燃料化学性质，以及（3）Lagrangian solver for for Liquets for Liquets for Liquelets for vass droplet两相流量和子模型。为了广泛验证和验证求解器和模型的开发和实现，研究了一系列基准案例，包括不反应的多组分气体流动，纯粹的气态爆发以及两相气体droplet混合物。结果表明，Ryrhocentralfoam求解器可以准确预测流量不连续性（例如冲击波和膨胀波），分子扩散，自动点击和冲击引起的点火。同样，Ryrhocentralfoam求解器可以准确模拟不同燃料（例如氢和甲烷）的气态爆炸传播，涉及传播速度，爆炸额结构和细胞尺寸。与分析和实验数据相关的与液滴相有关的子模型将经过验证和/或验证。还发现Ryrhocentralfoam求解器能够捕获气胶两相爆炸的主要数量和特征，包括爆炸式传播速度，相间相互作用和爆炸额额结构。作为我们未来的工作，也可以扩展RyrhoCentralFoam求解器，以模拟密集的液滴喷雾剂中的两相爆炸。
A hybrid Eulerian-Lagrangian solver RYrhoCentralFoam is developed based on OpenFOAM to simulate detonative combustion in two-phase gas-liquid mixtures. For Eulerian gas phase, RYrhoCentralFoam enjoys second order of accuracy in time and space discretizations and is based on finite volume method on polyhedral cells. The following developments are made based on the standard compressible flow solver rhoCentralFoam in OpenFOAM: (1) multi-component species transport, (2) detailed fuel chemistry for gas phase combustion, and (3) Lagrangian solver for gas-droplet two-phase flows and sub-models for liquid droplets. To extensively verify and validate the developments and implementations of the solver and models, a series of benchmark cases are studied, including non-reacting multi-component gaseous flows, purely gaseous detonations, and two-phase gas-droplet mixtures. The results show that the RYrhoCentralFoam solver can accurately predict the flow discontinuities (e.g. shock wave and expansion wave), molecular diffusion, auto-ignition and shock-induced ignition. Also, the RYrhoCentralFoam solver can accurately simulate gaseous detonation propagation for different fuels (e.g. hydrogen and methane), about propagation speed, detonation frontal structures and cell size. Sub-models related to the droplet phase are verified and/or validated against analytical and experimental data. It is also found that the RYrhoCentralFoam solver is able to capture the main quantities and features of the gas-droplet two-phase detonations, including detonation propagation speed, interphase interactions and detonation frontal structures. As our future work, RYrhoCentralFoam solver can also be extended for simulating two-phase detonations in dense droplet sprays.
