| 相对突扩间隙影响压力损失的研究 |
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| 引用本文： | 何小民,毛军逵,谈浩元.相对突扩间隙影响压力损失的研究[J].南京航空航天大学学报(英文版),2002,19(2):157-160. |
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| 作者姓名： | 何小民 毛军逵 谈浩元 |
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| 作者单位： | 南京航空航天大学能源与动力学院,南京,210016 |
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| 摘 要： | 相对突扩间隙δ是影响短突扩扩压器与火焰筒相互匹配的重要参数，直接影响前置扩压器流场，燃烧室三股流的流量分配等。通过对相对突扩间隙影响压力损失的试验和数值模拟研究，获得了总压损失系数相对突扩间隙的变化规律：随相对突扩间隙（δ＝1.2-3.0)由小到大的变化，总压损失系数先变小，后增加，即存在最佳的相对突扩间隙，使得压力损失有最小值。
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| 关 键 词： | 相对突扩间隙 压力损失 燃烧室 流量分配 |
EFFECT OF DUMP GAP ON TOTAL PRESSURE LOSS IN DUMP DIFFUSER |
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| He Xiaomin,Mao Junkui,Tan Haoyuan.EFFECT OF DUMP GAP ON TOTAL PRESSURE LOSS IN DUMP DIFFUSER[J].Transactions of Nanjing University of Aeronautics & Astronautics,2002,19(2):157-160. |
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| Authors: | He Xiaomin Mao Junkui Tan Haoyuan |
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| Abstract: | The dump diffuser is an important component in advanced annular combustor, and its performance affects greatly the fluid field and pressure loss of the combustor. This paper presents the characteristics of the total pressure loss. Experiments and numerical simulations, keeping the inlet March number of prediffuser constant (Ma=0.20), are carried out to obtain the regularity of the total pressure loss. It varies with the relative dump gap (δ=1.2～3.0)by changing the position of prediffuser and combustor liner, respectively. Research shows that there exists the minimum total pressure loss (σ*=1.6%～1.75%) when relative dump gap δ is about 1.8. |
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| Keywords: | dump diffuser relative dump gap pressure loss |
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