Large Eddy Simulation of Supersonic Combustion Using the Eulerian Stochastic Fields Method
Large Eddy Simulation of Supersonic Combustion Using the Eulerian Stochastic Fields Method
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DOI：
10.1007/s10494-019-00055-7
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发表时间：
2019-09
期刊：
影响因子：
--
通讯作者：
Y. Almeida;S. Navarro-Martinez
中科院分区：
文献类型：
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作者：
Y. Almeida;S. Navarro-Martinez
超音速内燃机(超燃冲压发动机)的发展面临着几个挑战。超燃冲压发动机燃烧的数值模拟已经成为实验研究的一种有吸引力的替代方案。然而，超音速燃烧模拟仍然面临一些挑战：例如激波/边界层和湍流/化学相互作用的适当模拟。本文提出了两种为高速应用而开发的大涡模拟概率密度函数(LES-PDF)新公式。一种是保守的联合标量方法，求解反应标量和能量的联合概率；另一种是联合速度标量。LES-PDF输运方程用欧拉随机场技术在基于密度的可压缩求解器中实现。通过对二维和三维超音速反应混合层的数值模拟，验证了模型的性能，并与文献中的数值模拟结果进行了比较。结果表明，联合标量公式是准确和稳健的，而联合速度标量闭合有待进一步发展。
The development of supersonic combustion engines (scramjet-type) presents several challenges. Numerical simulations of scramjet engine combustion have become an attractive alternative to experimental investigations. However, supersonic combustion simulations still have several challenges: such as adequate modelling of shock/boundary layer and turbulence/chemistry interactions. The present work presents two large-eddy simulation probability density function (LES-PDF) novel formulations developed for high-speed applications. One is a conservative joint-scalar approach, where the joint-probability for reactive scalars and energy is solved, while the other is a joint velocity-scalar. The LES-PDF transport equations are solved using the Eulerian stochastic fields technique implemented in a density-based compressible solver. The performance of the models is verified through the simulations of two and three-dimensional supersonic reacting mixing layers and compared against DNS data from the literature. The results show that the joint-scalar formulation is accurate and robust, while the joint velocity-scalar closures require further development.