| 小发直流燃烧室扩压器和火焰筒匹配的数值模拟 |
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| 引用本文： | 李概奇,严传俊.小发直流燃烧室扩压器和火焰筒匹配的数值模拟[J].航空动力学报,1997,12(3):299-302,334. |
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| 作者姓名： | 李概奇 严传俊 |
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| 作者单位： | 1.航空工业总公司第六0八研究所 |
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| 摘 要： | 采用数值模拟方法对某小发直流燃烧室扩压器和火焰筒匹配下的流场进行了计算和分析,用双方程k-ε模型描述紊流特性,用二步化学反应模型模拟化学反应,用空气流量分配作为火焰筒内外流场联合求解的桥梁,引入边界结点类型说明数组帮助复杂边界条件的处理。计算结果表明燃烧室环腔间形成两个强烈的回流区,内、外环腔流场极不对称,并且具有较强的三维性;前置扩压器倾斜角度是影响燃烧室流场和性能的最重要因素。
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| 关 键 词： | 小型透平发动机 燃烧室 数值模拟 流场 |
| 收稿时间： | 6/1/1996 12:00:00 AM |
| 修稿时间： | 9/1/1996 12:00:00 AM |
NUMERICAL SIMULATION FOR MATCHING DIFFUSER WITH LINER IN A SMALL DIRECT-FLOW COMBUSTOR |
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| Li Gaiqi and Yan Chuanjun.NUMERICAL SIMULATION FOR MATCHING DIFFUSER WITH LINER IN A SMALL DIRECT-FLOW COMBUSTOR[J].Journal of Aerospace Power,1997,12(3):299-302,334. |
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| Authors: | Li Gaiqi and Yan Chuanjun |
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| Affiliation: | 1.Zhuzhou Aviation Power Institute, Zhuzhou 4120022.Zhuzhou Aviation Power Institute, Zhuzhou 412002 |
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| Abstract: | Numerical simulation was carried out for inside and outside flowfields of the liner in a small direct-flow combustor with special structural arrangement,numerical tests of combustor performance were performed for matching of different diffusers with the liner.The program employs two-equations(K-ε model)to describe turbulent characteristics.The combustion following vaporization was simulated by a two-step chemical reaction eombustion model.Arrhenius-EBU model was used to determine the reaction rate,and the air flow mass distribution was taken as a bridge to link the inside and outside flowfields of the liner.The calculated results indicated that two strong recirculation zones emerged when air flowed into combustor annular cavity from prediffuser,the inside and outside flowfields were very unsymmetrical.The inclination of the predliffuser was an important geometrical parameter for the combustor performance. |
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| Keywords: | Small turbine engines Combustion chambers Numerical simulation Flow fields |
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