大涡流湍流非预混氢燃烧的过滤制表化学模拟

IF 1.4 4区 工程技术 Q3 ENGINEERING, MECHANICAL
Samuel Dillon, Renaud Mercier, Benoît Fiorina
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引用次数: 0

摘要

到2030年,航空运输量预计将以每年5%的速度增长,为了解决当前的环境危机,人们正在研究氢等替代燃料。出于安全考虑,未来的氢燃烧室将需要新的喷射系统设计,并有望在多模式燃烧制度下运行。从大涡模拟(LES)的角度来看,向新型氢气燃烧室技术转变的先决条件是能够在非预混条件下运行的鲁棒湍流燃烧模型。使用火焰前滤波的湍流燃烧建模是预混燃烧的一种成熟策略(过滤-制表化学大涡流模拟- F-TACLES)。这种方法已经推广到非预混火焰,然而,它受到火焰过滤器尺寸高灵敏度的影响。此外,较薄的氢火焰锋面将导致LES网格的分辨率较低,潜在地放大了这个问题。为了验证非预混F-TACLES模型应用于氢燃料的可行性,分别对一维和二维简单层流扩散火焰进行了计算。然后在雷诺数为10000的三维桑迪亚氢射流火焰上对模型进行了测试。模拟和先验试验表明,表列的亚网格尺度校正项是僵硬的,可能导致非物理结果,但该模型能够正确地再现小过滤器尺寸的非预混火焰结构。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Large-Eddy-Simulation of Turbulent Non-Premixed Hydrogen Combustion Using the Filtered Tabulated Chemistry Approach
Abstract With air traffic expected to grow 5% annually until the year 2030, alternative fuels such as hydrogen are being investigated in order to tackle the current environmental crisis. Due to safety concerns, future hydrogen combustion chambers will require new designs of injection systems and are expected to operate under multi-mode combustion regimes. From a Large-Eddy-Simulation (LES) perspective, a prerequisite for the shift towards new hy- drogen combustion chamber technologies is a robust turbulent combustion model capable of functioning in non-premixed condi- tions. Turbulent combustion modeling using flame front filtering is a well-developed strategy in premixed combustion (Filtered- TAbulated Chemistry for Large-Eddy-Simulation - F-TACLES). This approach has been extended to non-premixed flames how- ever, it suffers from high flame filter size sensitivity. Moreover, thin hydrogen flame fronts will result in lower resolution on the LES grid, potentially amplifying this issue. In order to address the feasibility of the non-premixed F-TACLES model applied to hydrogen fuel, simple 1-D and 2-D laminar counterflow diffusion flames are computed. The model is then tested on the 3-D Sandia hydrogen jet flame with a Reynolds number of 10000. Simulations and a-priori tests show that tabulated sub-grid-scale correction terms are stiff and can result in nonphysical results, however the model is capable of correctly reproducing non-premixed flame structures for small filter sizes.
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来源期刊
CiteScore
3.80
自引率
20.00%
发文量
292
审稿时长
2.0 months
期刊介绍: The ASME Journal of Engineering for Gas Turbines and Power publishes archival-quality papers in the areas of gas and steam turbine technology, nuclear engineering, internal combustion engines, and fossil power generation. It covers a broad spectrum of practical topics of interest to industry. Subject areas covered include: thermodynamics; fluid mechanics; heat transfer; and modeling; propulsion and power generation components and systems; combustion, fuels, and emissions; nuclear reactor systems and components; thermal hydraulics; heat exchangers; nuclear fuel technology and waste management; I. C. engines for marine, rail, and power generation; steam and hydro power generation; advanced cycles for fossil energy generation; pollution control and environmental effects.
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