Large-eddy simulation of high-speed vaporizing liquid-fuel spray using mixed gradient-type structural subgrid-scale model
Large-eddy simulation of high-speed vaporizing liquid-fuel spray using mixed gradient-type structural subgrid-scale model
复制标题
使用混合梯度型结构亚网格尺度模型对高速汽化液体燃料喷雾进行大涡模拟
DOI:
10.1080/00102202.2019.1673379
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发表时间:
2019-10
影响因子:
1.9
通讯作者:
Xiaobei Cheng
中科院分区:
文献类型:
--
作者:
Shujing Shao;Hao Lu;Zhaowen Wang;Xiaobei Cheng
The accuracy of the large-eddy simulation (LES) of high-speed vaporizing sprays is highly dependent on the choice of subgrid-scale (SGS) models. This study adopts a nonlinear SGS stress model to simulate a well-known high-speed non-reacting vaporizing liquid-fuel spray case, Spray A. An advantage of using the nonlinear structural SGS model is that it can provide reverse energy transfer from small to large scales, and thus, the model can be more accurate than traditional eddy-viscosity models at capturing cross-scale interactions between turbulence and spray. Also, the adopted gradient-type approach is very computationally efficient. To understand the performance of the nonlinear LES framework, this study presents comprehensive comparisons against experimental data and results obtained using the Smagorinsky model and the sub-grid kinetic energy model. In particular, we compare the general structure of the flows, liquid and vapor penetrations, and mass fraction profiles. Results using the nonlinear structural SGS stress model show minimal dependence on the grid size regarding the capture of flow structures. Using the same mesh resolution, the statistics of the simulated field exhibit both good agreement with measurements and a significant improvement over simulations based on the other two types of models. Results support the assertion that the proposed nonlinear LES framework can accurately achieve direct injection simulations with reasonable computational costs.
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影响因子:
4.4
作者:
S. Bhattacharjee;D. Haworth
通讯作者:
S. Bhattacharjee;D. Haworth
影响因子:
4.1
作者:
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通讯作者:
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影响因子:
27.7
作者:
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作者:
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Bert Vreman;B. Geurts;H. Kuerten
DOI:
--
发表时间:
2005-11
期刊:
Bulletin of the American Physical Society
影响因子:
--
作者:
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通讯作者:
Hao-Yuan Lu;C. Rutland;L. Smith