Large eddy simulation of turbulent partially premixed dimethyl ether jet flame by the extended direct moment closure model coupled with acceleration algorithms

IF 6.2 2区工程技术 Q2 ENERGY & FUELS

Combustion and Flame Pub Date : 2025-09-25 DOI:10.1016/j.combustflame.2025.114443

Kun Luo , Wei Chen , Runzhi Liu , Yicun Wang , Tai Jin , Jianren Fan

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引用次数: 0

Abstract

Developing accurate and efficient turbulent combustion models for partially premixed flames remains a key challenge due to the coexistence of premixed and non-premixed flames. In the present study, the direct moment closure (DMC) model, which is methodologically applicable to all combustion regimes, has been extended to multi-reactant reactions in complex chemistry, along with the incorporation of various acceleration algorithms to reduce computational cost. A TNF Workshop benchmark flame, i.e., the piloted partially premixed DME jet flame is simulated by the extended model, and the predicted results are compared with the experimental data and those of the typical conditional moment closure (CMC) model and the transported probability density function (TPDF) model. It is found that the extended DMC model has the capability of accurately predicting the partially premixed DME jet flame and better performance than the CMC and TPDF models. Among the acceleration algorithms, the tabulated dynamic adaptive chemistry method achieves the best performance, with all RMS errors below 2.2 % and an acceleration ratio of 2.22. These results demonstrate that the DMC model coupled with the TDAC acceleration algorithm is promising for turbulent combustion, offering both high accuracy and computational efficiency.

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采用扩展直接力矩闭合模型结合加速算法模拟部分预混二甲醚射流火焰湍流大涡

由于预混和非预混火焰的共存，开发准确、高效的部分预混火焰湍流燃烧模型仍然是一个关键的挑战。在本研究中，直接力矩闭合（DMC）模型在方法上适用于所有燃烧状态，已扩展到复杂化学中的多反应物反应，并结合各种加速算法以降低计算成本。采用扩展模型对TNF Workshop基准火焰即先导部分预混二甲醚射流火焰进行了模拟，并将预测结果与实验数据以及典型条件矩闭（CMC）模型和传递概率密度函数（TPDF）模型的预测结果进行了比较。结果表明，扩展DMC模型能较准确地预测二甲醚部分预混射流火焰，且性能优于CMC模型和TPDF模型。在加速算法中，表化动态自适应化学方法的性能最好，均均方根误差小于2.2%，加速比为2.22。这些结果表明，DMC模型与TDAC加速算法相结合，具有较高的计算精度和计算效率。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Combustion and Flame 工程技术-工程：化工

CiteScore

9.50

自引率

20.50%

发文量

631

审稿时长

3.8 months

期刊介绍： The mission of the journal is to publish high quality work from experimental, theoretical, and computational investigations on the fundamentals of combustion phenomena and closely allied matters. While submissions in all pertinent areas are welcomed, past and recent focus of the journal has been on: Development and validation of reaction kinetics, reduction of reaction mechanisms and modeling of combustion systems, including: Conventional, alternative and surrogate fuels; Pollutants; Particulate and aerosol formation and abatement; Heterogeneous processes. Experimental, theoretical, and computational studies of laminar and turbulent combustion phenomena, including: Premixed and non-premixed flames; Ignition and extinction phenomena; Flame propagation; Flame structure; Instabilities and swirl; Flame spread; Multi-phase reactants. Advances in diagnostic and computational methods in combustion, including: Measurement and simulation of scalar and vector properties; Novel techniques; State-of-the art applications. Fundamental investigations of combustion technologies and systems, including: Internal combustion engines; Gas turbines; Small- and large-scale stationary combustion and power generation; Catalytic combustion; Combustion synthesis; Combustion under extreme conditions; New concepts.