| 脉冲射流控制弯曲扩压管道流动分离的特点 |
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| 引用本文： | 朱剑锋,黄国平,傅鑫,付勇.脉冲射流控制弯曲扩压管道流动分离的特点[J].航空动力学报,2015,30(12):2942-2948. |
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| 作者姓名： | 朱剑锋 黄国平 傅鑫 付勇 |
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| 作者单位： | 南京航空航天大学能源与动力学院江苏省航空动力系统重点实验室, 南京 210016;中国航空工业集团公司中国航空动力机械研究所, 湖南株洲 412002,南京航空航天大学能源与动力学院江苏省航空动力系统重点实验室, 南京 210016,南京航空航天大学能源与动力学院江苏省航空动力系统重点实验室, 南京 210016,南京航空航天大学能源与动力学院江苏省航空动力系统重点实验室, 南京 210016 |
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| 基金项目： | 国家自然科学基金(51176072);江苏省普通高校研究生科研创新基金(CXLX11_0216) |
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| 摘 要： | 结合弯曲扩压通道的脉冲射流总体控制规律,开展了不同射流频率下通道内流场的稳定及动态特性分析.研究结果表明:定常射流控制状态下,流场内沿径向不同位置流动特性的变化幅度基本相同,定常射流通过压制通道内复杂流动现象达到整体线性地改变通道内流场特性的效果;而在合理脉冲射流控制状态下,脉冲射流对流场的影响主要是通过改变分离涡的脉动时空特性,沿径向逐步增强对流场的影响,从而使得主流区内总压损失降低幅度最为明显,此时扩压通道内占主导地位分离涡的周期性特征有了明显的改善,流场拟序结构更为有序.
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| 关 键 词： | 脉冲射流 非定常 流动分离 弯曲扩压管道 分离涡 |
| 收稿时间： | 2014/5/28 0:00:00 |
Characteristic of controlling flow separation in divergent curved channels by pulsed jet |
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| ZHU Jian-feng,HUANG Guo-ping,FU Xin and FU Yong.Characteristic of controlling flow separation in divergent curved channels by pulsed jet[J].Journal of Aerospace Power,2015,30(12):2942-2948. |
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| Authors: | ZHU Jian-feng HUANG Guo-ping FU Xin and FU Yong |
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| Institution: | Jiangsu Province Key Laboratory of Aerospace Power System, College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;China Aviation Powerplant Research Institute, Aviation Industry Corporation of China, Zhuzhou Hunan 412002, China,Jiangsu Province Key Laboratory of Aerospace Power System, College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China,Jiangsu Province Key Laboratory of Aerospace Power System, College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China and Jiangsu Province Key Laboratory of Aerospace Power System, College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China |
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| Abstract: | Combined with the pulsed jet overall control ruler of divergent curved channels, the steady and unsteady characteristics of flow fields in channel under different frequency states were analysed. Results show that the flow characteristics change amplitude is similar along the radial direction under steady control state, and the influence of steady jet suppresses the complex flow phenomenon and linearly changes the flow characteristic of the flow field. Under suitable pulsed jet control state, the influence of pulsed jet on the flow field is presented by changing the fluctuation time-space characteristic of separation vortex, so that the influence amplitude increases along the radial direction, and the decreased magnitude of total pressure loss in the mainstream region is more obvious; meanwhile, the periodic characteristic of the dominant separation vortex is improved significantly, and the flow coherent structure is more orderly. |
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| Keywords: | pulsed jet unsteadiness flow separation divergent curved channels separation vortex |
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