气液两相绕流钝体稳燃器的冷态数值研究

许欢; 李志强; 董鹤; 杨青; 邵兴晨

doi:10.13224/j.cnki.jasp.2014.10.016

气液两相绕流钝体稳燃器的冷态数值研究

doi: 10.13224/j.cnki.jasp.2014.10.016

北京航空航天大学能源与动力工程学院, 航空发动机气动热力国家级重点实验室, 北京 100191

详细信息

作者简介:
许欢（1989- ），男，河北沧州人，硕士生，主要从事钝体绕流数值研究.xuhuan1989qq@sina.com

中图分类号: V211.1
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出版历程
- 收稿日期: 2013-06-24
- 刊出日期: 2014-10-28

Numerical investigation of gas-liquid two-phase cold-flow around bluff-body stabilized burners

National Key Laboratory of Science and Technology on Aero-Engine Aero-thermodynamics, School of Energy and Power Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

摘要

摘要: 提出并建立了基于可变时间间隔平均方法的多尺度两相湍流模型，通过算例验证，证实了所推导的气液两相多尺度数学模型、所标定的模化参数及描述气液两相作用机理的合理性，及其计算的时间平均阻力系数、脉动升力系数误差、斯特劳哈尔数和回流区大小误差分别为1.45%，0.323%，2.17%，2.33%，计算结果明显优于标准k-ε 和重整化群（RNG）k-ε模型.用多尺度湍流模型对气液两相绕流6个不同的钝体稳燃器进行数值计算表明：船形与锥形是综合性能较优的两个钝体稳燃器结构.其中，船形钝体比锥形钝体稳燃器回流区大10.53%，其时间平均阻力系数比锥形稳燃器大4.776%，方均根脉动升力系数比锥形稳燃器小44.73%，通过全方面综合比较，船形是综合性能最优的钝体稳燃器结构.
- 气液两相流 /
- 钝体稳燃器 /
- 多尺度 /
- 湍流模型 /
- 冷态
Abstract: Based on the variable time interval average method, a multi-scale two-phase turbulent model was put forward and established. Compared with the experiment results, the rationality of the multi-scale gas-liquid two-phase mathematic model, the modeling parameters and interactive mechanism of gas-liquid two-phase flows was proved. Its relative error of drag coefficient was 1.45%, and the fluctuating lift coefficient was 0.323%. This model could also accurately predict vortex shedding characteristics with its relative error of St was 2.17%. However, its relative error of size of the recirculation zone was 2.33%. And the computational results were better than those of the standard k-ε and RNG (renormalization group) k-ε models. Using the multi-scale two-phase turbulent model, the two-phase flow around six different bluff-body stabilized burners was predicted. The computational results show that the ship-shaped and cone-shaped structures have good overall performance in these six different bluff-body stabilized burners. The recirculation zone of ship-shaped structure is larger than cone-shaped by 10.53%. The time-averaged drag coefficient of ship-shaped structure is larger than cone-shaped by 4.776%. The root-mean-square value of fluctuating lift coefficient of ship-shaped structure is smaller than cone-shaped by 44.73%. And by comprehensive comparison, the ship-shaped structure has the best performance.
- gas-liquid two-phase flow /
- bluff-body stabilized burners /
- multi-scale /
- turbulence model /
- cold-flow

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