| 摘要: |
| 为了探寻高效的冷却技术,将多斜孔壁冷却结构应用于燃烧室火焰筒中,在实际工作条件下,对三种孔排布方式的火焰筒冷却特性进行了数值模拟。研究了斜排孔阵的周向偏移量H相对周向孔间距p的变化(模型A:H/p=0.2；模型B:H /p=0.4；模型C:H/p=0.5)对冷却特性的影响。计算结果表明,在燃烧室进口条件相同时,H/p的变化对总冷却用气量的影响很小,但对火焰筒的传热特性有明显影响,模型C的冷却效果优于模型A和B,并且火焰筒出口的温度分布不均匀系数ε较小。 |
| 关键词: 多斜孔壁冷却 孔排布 火焰筒 燃烧室 |
| DOI： |
| 分类号: |
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| Numerical Simulation of Effect of Hole Displacement on Heat Transfer Characteristics of an Effusion Cooled Flame Tube |
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HU Ya-ping1, JI Hong-hu1, ZHENG Mei1,2, ZHANG Bo1
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(1. College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;2. Nanjing Electrical and Hydraulic Engineering Research Center,Aviation Industry Corporation of China, Nanjing 211102, China)
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| Abstract: |
| To investigate effective cooling method, effusion-cooling was applied in combustion chamber flame tube. The heat transfer characteristics of three effusion cooling structures under actual conditions were studied. The effects of different circumferential array displacement H to circumferential spacing p of holes array(model A:H/p=0.2；model B: H/p=0.4；model C:H/p=0.5)on the cooling characteristics were investigated. The computation results show H/p has little effect on the total flow rate of cooling air but an obvious effect on heat transfer characteristics. The cooling effectiveness of model C is higher than that of model A and B and the outlet temperature distribution factor ε on the outlet of flame tube is the smallest. |
| Key words: Effusion cooling Hole displacement Flame tube Combustion chamber |
