Review on Large Eddy Simulation of Turbulent Premixed Combustion in Tubes

Luo, Gang; Dai, Haidong; Dai, Ling-Peng; Qian, Yunlou; Sha, Ce; Zhang, Yuxiang; Wu, Bingxin

doi:10.1007/s11630-020-1311-5

Cited by 13 publications

(3 citation statements)

References 87 publications

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“…The flamelet solutions are filtered employing the Gaussian filter operator from Equation (13). Additional to the thermochemical quantities and the closure terms, the look-up table contains a flamelet label K Label .…”

Section: Filtered Chemical Databasementioning

confidence: 99%

“…In DNS all turbulence scales are explicitly computed, in LES only the larger scale motions are resolved on the numerical grid and the smaller scale motions are accounted for by a subgrid scale (SGS) model [10], and in RANS only mean flow fields are resolved [11]. LES is a well developed approach [12] which offers a substantial decrease with respect to DNS [13], a non exhaustive list for the interested reader includes the work in [14][15][16][17][18][19][20]. The filtering or ensemble averaging of the balance equations, in LES and RANS respectively, gives origin to unclosed terms which are unknown and should be modeled [21].…”

Section: Introductionmentioning

confidence: 99%

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Non-Premixed Filtered Tabulated Chemistry: Filtered Flame Modeling of Diffusion Flames

Vega

Coussement

Sadiki

et al. 2021

Fuels

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The flame front filtering is a well-known strategy in turbulent premixed combustion. An extension of this approach for the non-premixed combustion context has been proposed by means of directly filtering counterflow diffusion flamelets. Promising results were obtained for the non-premixed filtered tabulated chemistry formalism on 1-D and 2-D unresolved counterflow flame configurations. The present paper demonstrates the soundness of this approach on a 3-D real laminar non-premixed coflow flame. The model results are compared against the direct filtering of the fully resolved laminar diffusion flame showing that the formalism adequately describes the underlying physics. The study reveals the importance of the one-dimensional counterflow flamelet hypothesis, so that the model activation under this condition is ensured by means of a flame sensor. The consistent coupling between the model and the flame sensor adequately retrieves the flame lift-off and satisfactorily predicts the profile extension due to the filtering process.

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Section: Filtered Chemical Databasementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Non-Premixed Filtered Tabulated Chemistry: Filtered Flame Modeling of Diffusion Flames

Vega

Coussement

Sadiki

et al. 2021

Fuels

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“…With the rapid development of computing technology, numerical simulation has become a reliable and efficient method to study the flow field characteristics of the DJV and the acoustic field. Compared with the direct numerical simulation (DNS) and Reynolds-averaged Navier-Stokes (RANS) model, the LES is considered to be the most promising numerical method to study the flow characteristics [19]. Using the LES method, we can obtain the velocity contours evolution [10] and the development of cavitation [6,20].…”

Section: Introductionmentioning

confidence: 99%

Numerical Study on Flow-Induced Noise of Deflector Jet Servo Valve Based on LES/Lighthill Hybrid Method

Ren

Yan

Cai³

2022

Shock and Vibration

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The flow-induced noise occurring in the prestage of the deflector jet servo valve (DJV) significantly affects the performance of DJV, which is a critical issue for electrohydraulic servo valves. To capture the root causes of flow-induced noise, DJV is numerically studied using computational aeroacoustics (CAA) methods in this paper. The acoustic field is investigated with Lighthill’s acoustic analogy based on the pulsation data from a large eddy simulation (LES). The flow-induced noise generation mechanism in DJV is revealed by analyzing the sound pressure level and vorticity distribution at different moments. Moreover, a kind of oscillation cavity model based on the Helmholtz oscillator is built, which reveals that the flow-induced noise is caused by self-excited oscillation and vortex. In addition, the result shows that continuous broadband dipole noise with medium- and high-frequency components of 1100 Hz and 2501 Hz dominates the DJV flow field. In order to avoid unexpected resonance, the natural frequency of the prestage should not coincide with the frequency of the flow oscillation frequency. Thus, this work can benefit the design and optimization of the prestage structure.

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Large Eddy Simulation Study on the Turbulence and Flame Characteristics under Analogical Integral Scale and Turbulence Intensity of Turbulent Premixed Flames

et al. 2023

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Review on Large Eddy Simulation of Turbulent Premixed Combustion in Tubes

Cited by 13 publications

References 87 publications

Non-Premixed Filtered Tabulated Chemistry: Filtered Flame Modeling of Diffusion Flames

Non-Premixed Filtered Tabulated Chemistry: Filtered Flame Modeling of Diffusion Flames

Numerical Study on Flow-Induced Noise of Deflector Jet Servo Valve Based on LES/Lighthill Hybrid Method

Large Eddy Simulation Study on the Turbulence and Flame Characteristics under Analogical Integral Scale and Turbulence Intensity of Turbulent Premixed Flames

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