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首页> 外文期刊>Mechanics & Industry >Modeling and numerical study of H 2/N 2 jet flame in vitiated co-flow using Eulerian PDF transport approach
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Modeling and numerical study of H 2/N 2 jet flame in vitiated co-flow using Eulerian PDF transport approach

机译：使用欧拉PDF传输方法在虚流循环中的H 2 / n 2 喷射火焰的建模与数值研究

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摘要

The multi-environment Eulerian approach (MEPDF) is the eulerian method to solve the PDF transport equations; it is considered a product of the delta function. Its advantages are the prediction of extinction and ignition of the flame, also the kinetic control of the species as CO and NOX. Even though the MEPDF approach has been improved in recent years, most improvements have been achieved with parametric study in order to investigate the impact of the model accuracy. The main objective of this work is to improve further the model accuracy, the prediction of the lift off height by a parametric study of the mixing constant and Schmidt number and to understand its impact in flame stabilization. The numerical investigation of H_(2)/N_(2)jet flame in vitiated co-flow is presented using MEPDF approach. The study was applied with K-epsilon modified model of turbulence. The chosen mixture model is the IEM (Interaction by Exchange with the Mean). The number of environment in the multi-environment Eulerian approach MEPDF is (2.0). The model was solved in this work by the commercial CFD code, ANSYS fluent and the chemical reaction mechanism injected is GRI mech 2.1. The results are validated with experimental data and discussed.
机译：多环境欧拉方法（MEPDF）是解决PDF传输方程的欧拉米列方法;它被认为是Delta函数的乘积。其优点是预测火焰的消灭和点火，也是物种作为CO和NOx的动力学控制。尽管近年来MEPDF方法已得到改善，但参数研究已经实现了大多数改进，以调查模型精度的影响。这项工作的主要目的是进一步提高模型准确性，通过参数研究对升力的高度预测混合常数和施密特数，并了解其对火焰稳定的影响。使用MEPDF方法介绍了在虚弱的共流中的H_（2）/ N_（2）喷射火焰的数值研究。该研究应用于K-Epsilon改性模型的湍流模型。所选择的混合模型是IEM（通过交换与平均值相互作用）。多环境欧拉方法MEPDF中的环境数量是（2.0）。该模型在这项工作中由商业CFD代码解决，注入的ANSYS流畅，化学反应机制是GRI MECH 2.1。结果用实验数据验证并讨论。

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