基于自适应 TPDF-ASOM 燃烧模型的甲烷射流火焰和双旋流燃烧室模拟

Simulation of Methane Jet Flame and Dual-Vortex Combustion Chamber Based on the Adaptive TPDF-ASOM Combustion Model

摘要

先进燃气轮机燃烧室设计需要对湍流火焰进行精确控制，提高模拟模型精度和效率至关重要。湍流与反应间的复杂非线性相互作用一直是挑战。本文针对湍流燃烧的局部特性，提出了自适应湍流燃烧模型的解决方案。在动态自适应燃烧模型研究基础上，类比湍流模拟的思路，提出了空间自适应燃烧模型。新模型将输运概率密度函数燃烧模型（transported probability density function combustion model，TPDF）与代数二阶矩燃烧模型 （algebraic second-order moment combustion model，ASOM）相结合，形成 TPDF-ASOM 模型。采用甲烷喷射火焰和煤油双漩涡燃烧器的实验数据进行验证，结果显示，新的 TPDF-ASOM 复合燃烧模型精度与 TPDF 模型相当，且能显著降低计算成本。临界准则可平衡仿真精度和效率。

Abstract

The design of advanced gas turbine combustors requires precise control of turbulent flames，and im-proving the accuracy and efficiency of simulation models is of vital importance.The complex nonlinear interactions between turbulence and chemical reactions have always been a challenge.This paper proposes a solution for an adaptive turbulent combustion model based on the local characteristics of turbulent combustion.Building on the research of dynamic adaptive combustion models and drawing on the ideas of turbulence simulation，this paper proposes a spatially adaptive combustion model.The new model is developed by integrating the transported prob-ability density function（TPDF）combustion model with the algebraic second-order moment（ASOM）combustion model，and is thus termed the TPDF-ASOM model.Experimental data from methane jet flames and kerosene dual-vortex burners are used for validation.The results show that the new TPDF-ASOM composite combustion model has accuracy comparable to that of the TPDF model and can significantly reduce computational costs.A critical criterion can balance simulation accuracy and efficiency.

关键词

概率密度函数输运方程湍流燃烧模型 / 代数二阶矩湍流燃烧模型 / 自适应 TPDF-ASOM 燃烧模型 / 达姆科勒数 Da

Key words

transported probability density function turbulent combustion model / algebraic second-order moment turbulent combustion model / adaptive TPDF-ASOM combustion model / Damkohler number

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基金资助

国家自然科学基金资助项目(20244BAB28005)

国家自然科学基金资助项目(20232ACB204026)

国家自然科学基金资助项目(12172345)