Turbulent spray combustion modeling in reduced tabulation parameter space by similarity mapping

IF 5.8 2区工程技术 Q2 ENERGY & FUELS

Combustion and Flame Pub Date : 2024-09-30 DOI:10.1016/j.combustflame.2024.113749

Qun Hu, Lipo Wang

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引用次数: 0

Abstract

To overcome the modeling challenge from the coupling between liquid vaporization and chemical reaction in turbulent spray combustion, a similarity mapping approach is implemented to reduce the flamelet tabulation parameters. In the framework of Eulerian–Lagrangian multiphase large eddy simulations (LES), such a modeling idea is developed upon the conventional flamelet/progress variable model. The flamelet library is constructed from a series of quasi one-dimensional spray counterflow solutions, integrated with the multiple solution modes. Test cases, including the laminar spray counterflow flame and Sydney turbulent spray flame, indicate that this newly proposed model is in principle favorable to improve the numerical predictability with acceptable computational cost. Overall, the flame structure can be appropriately captured, showing better performance compared with some reported results.

Novelty and significance statement

A newly proposed similarity mapping spray flamelet/progress variable (SMFPV) model is implemented for turbulent spray combustion. In SMFPV, the number of entry parameters of the flamelet library is reasonably reduced and two-way coupling between flame and evaporation can be realized. Thus in principle, SMFPV is favorable to improve the numerical predictability with acceptable computational cost. Simulation results of test cases justify the modeling idea.

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通过相似性映射在缩小的表格参数空间中建立湍流喷雾燃烧模型

为了克服湍流喷雾燃烧中液体汽化和化学反应耦合所带来的建模挑战，我们采用了一种相似性映射方法来减少火焰子表参数。在欧拉-拉格朗日多相大涡度模拟（LES）框架内，这种建模思想是在传统的小火焰/进展变量模型基础上发展起来的。小火焰库由一系列准一维喷雾逆流解法构建，并与多种解法模式集成。包括层流喷雾逆流火焰和悉尼湍流喷雾火焰在内的测试案例表明，新提出的模型原则上有利于提高数值预测能力，且计算成本可接受。新颖性和意义声明针对湍流喷雾燃烧，提出了新的相似性映射喷雾火焰/进展变量（SMFPV）模型。在 SMFPV 模型中，小火焰库的入口参数数量得到了合理的减少，并实现了火焰与蒸发之间的双向耦合。因此，从原理上讲，SMFPV 有利于以可接受的计算成本提高数值预测能力。测试案例的仿真结果证明了建模思路的正确性。

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.