| 带盖盘45°预旋系统流动特性的实验 |
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| 引用本文： | 孙占东,罗翔,黄由之,周志翔,廖乃兵.带盖盘45°预旋系统流动特性的实验[J].航空动力学报,2017,32(9):2125-2131. |
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| 作者姓名： | 孙占东 罗翔 黄由之 周志翔 廖乃兵 |
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| 作者单位： | 1.北京航空航天大学 能源与动力工程学院,北京 100191 |
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| 摘 要： | 对带盖盘45°预旋系统的预旋腔和转静腔内流动特性进行了实验研究，得到了高转速下静盘表面的静压分布、中心面（z/S=0.326）总压分布、流阻系数以及预旋孔排气系数的变化规律。结果表明:流量分配对腔内压力分布影响较小；湍流参数是腔内流动特性的主要影响参数之一；腔内流动结构主要分为转静腔的自由涡结构以及预旋腔的回流区和低压区；流阻系数随湍流参数变大而显著上升；预旋孔排气系数随着进、出口压比增加而增加。
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| 关 键 词： | 盖盘 预旋 转静系 预旋腔 流动 |
| 收稿时间： | 2016/1/12 0:00:00 |
Experiment of flow characteristics of cover-plate 45° pre-swirl system |
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| SUN Zhandong,LUO Xiang,HUANG Youzhi,ZHOU Zhixiang,LIAO Naibing.Experiment of flow characteristics of cover-plate 45° pre-swirl system[J].Journal of Aerospace Power,2017,32(9):2125-2131. |
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| Authors: | SUN Zhandong LUO Xiang HUANG Youzhi ZHOU Zhixiang LIAO Naibing |
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| Abstract: | Flow characteristics of pre-swirl cavity and rotor-stator cavity of a cover-plate 45° pre-swirl system structure were studied experimentally.Static pressure distribution on the stator,total pressure distribution on the mid plane (z/S=0.326) and variations of the flow resistance coefficient in cavity and pre-nozzle discharge coefficient were obtained under high rotation speed.The results show that the pressure distribution in cavity is affected by the flow distribution weakly.The turbulent flow parameter is one of the primary control parameters of flow characteristics.The flow structure in cavity is mainly divided into two parts,the free vortex structures of rotor-stator cavity,and the recirculation and low pressure zones in pre-swirl cavity.The flow resistance coefficient of the cavity rise significantly with the increase of the turbulent flow parameter.The discharge coefficient of pre-swirl nozzle increases with the increasing pressure ratio of pre-swirl nozzle. |
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| Keywords: | cover plate pre swirl rotor stator system pre swirl cavity flow |
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