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首页> 外文会议>ASME turbo expo >NUMERICAL SIMULATION OF BIOMASS DERIVED SYNGAS COMBUSTION IN A SWIRL FLAME COMBUSTOR
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NUMERICAL SIMULATION OF BIOMASS DERIVED SYNGAS COMBUSTION IN A SWIRL FLAME COMBUSTOR

机译：旋流燃烧器中生物质合成气燃烧的数值模拟

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摘要

In this work a numerical investigation is carried out on a model combustor characterized by swirl flow conditions, fed with a biomass derived syngas fuel (which incorporates CH4, CO and H_2) and operated in laboratory at atmospheric pressure. The combustor internal aerodynamics and heat release in case of syngas combustion have been simulated in the framework of CFD-RANS techniques, by means of different available models and by adopting different levels of kinetic mechanism complexity. In particular, the applicability of reduced mechanisms involving CO and H_2 species and also of detailed kinetic mechanisms are assessed. The results obtained by means of the CFD simulations on the model combustor and a comparison with available experimental data on flow field and thermal field are presented in the paper. In the test-case of syngas-air swirled flames, the turbulent non premixed combustion "flamelet" model with detailed non-equilibrium chemistry, originally developed for methane-air combustion, provides encouraging results in terms of temperature distribution. Nevertheless, a simpler chemical path including the main fuel species integrated in a general purpose, widely used in industry, turbulent combustion model still provides acceptable results.
机译：在这项工作中，对以涡流条件为特征的模型燃烧器进行了数值研究，并向其供给了由生物质衍生的合成气燃料（包含CH4，CO和H_2），并在大气压下在实验室中运行。在合成气燃烧的情况下，燃烧器的内部空气动力学和放热已经在CFD-RANS技术的框架内通过不同的可用模型并采用了不同程度的动力学机制复杂度进行了模拟。尤其是，评估了涉及CO和H_2物种的还原机理以及详细动力学机理的适用性。本文介绍了通过在模型燃烧器上进行CFD仿真获得的结果，并与现有的流场和热场实验数据进行了比较。在合成气-空气旋流火焰的测试案例中，最初为甲烷-空气燃烧开发的具有详细非平衡化学特性的湍流非预混燃烧“小火焰”模型在温度分布方面提供了令人鼓舞的结果。尽管如此，一种更简单的化学路径（包括通用集成的主要燃料种类）已在工业中广泛使用，湍流燃烧模型仍然可以提供可接受的结果。

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