LES Modeling for Turbulent Combustion Flows Based on Flamelet approach

基于小火焰方法的湍流燃烧流 LES 建模

• 批准号: 15360091
• 负责人: OSHIMA Nobuyuki
• 金额: $ 9.41万
• 依托单位: HOKKAIDO UNIVERSITY (2005)The University of Tokyo (2003-2004)
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2003
• 资助国家: 日本
• 起止时间: 2003 至 2005
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-15360091/
• 关键词: Fluid Engineering; Computational Fluid Dynamics; Turbulence; Reactive Flow; Numerical Simulation; Visualization; Flame; Large Eddy Simulation; flameletモデル; スプレー流れ; 燃焼器

In recent energy and environmental problems under the conscious of their limitation, this research aims to develop a new numerical simulation modeling for turbulent combustion flows based on a large eddy simulation (LES) and a flamelet approach to apply it to an optimal flow design in the industrial gasturbines and vehicle engines which cover the strict requirement for next gereation energy equipment. In this research, multi scale physics were investigated ; 1) the numerical method was improved for the large scale simulation of actual geometry and condition at the industrial problems, 2) Numerical modeling was newly developed for inhomogeneous non-premixed turbulent flames, 3) detail phenomena in the flame and its interaction to particles are investigated. The following results were obtained ;a) LES modeling for turbulent combustion flow was developed based on flamelet approach. Combing G-equation model for premixed flame and conservation scalar model for diffusion one, 2-scalar flamelet model was newly proposed for non-premixed turbulent flames. The model was validated on the turbulent combustion of industrial gasturbine combustor.b) Interaction of flow fluctuation and combustion was investigated on the basic spray banner. Detail phenomena of spray motion, vaporization and chemical reaction were investigated by LES and experiment for probing the models in each essential process.c) Fusion of numerical simulation and experiments was investigated. "Vsual fusion techniques" were applied to the spray analysis, where the basic visual system was developed for combining the graphics results of numerical simulation and visualization in experiment in three-dimensional animation and the interactive processing.

针对当前能源和环境问题，在意识到其局限性的情况下，本研究旨在发展一种新的基于大涡模拟(LES)和火焰面方法的湍流燃烧数值模拟模型，将其应用于满足下一代能源设备严格要求的工业燃气轮机和汽车发动机的最优流动设计。在本研究中，对多尺度物理进行了研究：1)改进了数值模拟方法，用于工业实际问题的大规模模拟；2)对非均匀非预混湍流火焰进行了新的数值模拟；3)研究了火焰中的细节现象及其与颗粒的相互作用。取得了以下研究成果：a)基于火焰面方法建立了湍流燃烧的大涡模拟。结合预混火焰的G方程模型和扩散守恒标量模型，提出了非预混湍流火焰的2标量火焰面模型。对工业燃气轮机燃烧器的湍流燃烧进行了验证。b)在基本喷雾装置上研究了气流脉动与燃烧的相互作用。通过大涡模拟研究了喷雾运动、汽化和化学反应的详细现象，并通过实验对各个过程的模型进行了探讨。c)研究了数值模拟与实验的融合。将“虚拟融合技术”应用到喷雾分析中，开发了基本的可视化系统，将数值模拟的图形结果和实验中的可视化结果结合在一起，进行三维动画和交互处理。

项目成果

乱流燃焼流れのラージ・エディ・シミュレーション

湍流燃烧流的大涡模拟

• 发表时间: 2004
• 期刊: 日本流体力学会誌 vol.11, no.04
• 作者: H.Hu;T.Saga;T.Kobayashi;N.Taniguchi;N.Taniguchi;谷口伸行
• 通讯作者: 谷口伸行

Y.Itoh: "Numerical Prediction of Vaporizing Spray by using Large Eddy Simulation in Swirling Flows"The 5th Asian Computational Fluid Dynamics. (2003)

Y.Itoh：“利用旋流中的大涡模拟对汽化喷雾进行数值预测”第五届亚洲计算流体力学。

CFD技術の最前線

CFD技术前沿

• 发表时间: 2004
• 期刊: 日本エネルギー学会誌 第83巻 第5号
• 作者: 大島伸行;N.Oshima;H.Hu;雷康斌;谷口伸行
• 通讯作者: 谷口伸行

乱流燃焼のラージ・エディ・シミュレーション

湍流燃烧的大涡模拟

• 发表时间: 2003
• 期刊: 日本流体力学会数値流体力学部門WEB会誌 第11巻 第4号
• 作者: H.Kinoshita;M.Oshima;S.Kaneda;T.Saga;T.Kobayashi;N.Taniguchi Y.Itoh E.Yamada S.Tokuda;雷康斌;M.Tsubokura;谷口伸行
• 通讯作者: 谷口伸行

谷口伸行: "非燃焼、燃焼バーナ乱流LESにおける流入変動モードの影響"日本機械学会2003年度年次大会. (2003)

Nobuyuki Taniguchi：“流入波动模式对非燃烧、燃烧燃烧器湍流 LES 的影响”日本机械工程师学会 2003 年年会（2003 年）。