| 接触面积和流向涡对波瓣混合器引射比的影响 |
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| 引用本文： | 叶宇琛,黄勇,刘磊,魏福清.接触面积和流向涡对波瓣混合器引射比的影响[J].航空动力学报,2015,30(8):2011-2017. |
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| 作者姓名： | 叶宇琛 黄勇 刘磊 魏福清 |
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| 作者单位： | 北京航空航天大学 能源与动力工程学院 航空发动机气动热力国家级重点实验室, 北京 100191;先进航空发动机协同创新中心, 北京 100191;中国航空工业集团公司 中国直升机设计研究所, 江西 景德镇 333001,北京航空航天大学 能源与动力工程学院 航空发动机气动热力国家级重点实验室, 北京 100191;先进航空发动机协同创新中心, 北京 100191,北京航空航天大学 能源与动力工程学院 航空发动机气动热力国家级重点实验室, 北京 100191;先进航空发动机协同创新中心, 北京 100191,北京航空航天大学 能源与动力工程学院 航空发动机气动热力国家级重点实验室, 北京 100191;先进航空发动机协同创新中心, 北京 100191 |
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| 摘 要： | 通过对波瓣混合器的数值计算,研究了接触面积和流向涡对波瓣混合器引射比的影响.计算结果表明:主次流的接触面积越大,波瓣混合器的引射性能就越好,引射比随波瓣周长比的增加而线性递增.同时,流向涡的强度越大,波瓣混合器的引射比也越大,引射比随量纲一流向涡强度的增加而先快后慢增加,两者之间是指数的关系.当波瓣张角未导致气流分离时,主喷管出口的流向涡角动能随波瓣张角的增加而先慢后快增加,两者之间是抛物线的关系.而且,波瓣张角的增大不仅可以增加流向涡的涡量,还可以扩大流向涡的分布区域.
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| 关 键 词： | 波瓣混合器 接触面积 流向涡强度 引射比 波瓣张角 |
| 收稿时间： | 2014/3/11 0:00:00 |
Effects of interfacial contact area and streamwise vortices on pumping ratio of lobed mixer |
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| YE Yu-chen,HUANG Yong,LIU Lei and WEI Fu-qing.Effects of interfacial contact area and streamwise vortices on pumping ratio of lobed mixer[J].Journal of Aerospace Power,2015,30(8):2011-2017. |
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| Authors: | YE Yu-chen HUANG Yong LIU Lei and WEI Fu-qing |
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| Institution: | National Key Laboratory of Science and Technology on Aero-Engine Aero-thermodynamics, School of Energy and Power Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China;Collaborative Innovation Center for Advanced Aero-Engine, Beijing 100191, China;China Helicopter Research and Development Institute, Aviation Industry Corporation of China, Jingdezhen Jiangxi 333001, China,National Key Laboratory of Science and Technology on Aero-Engine Aero-thermodynamics, School of Energy and Power Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China;Collaborative Innovation Center for Advanced Aero-Engine, Beijing 100191, China,National Key Laboratory of Science and Technology on Aero-Engine Aero-thermodynamics, School of Energy and Power Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China;Collaborative Innovation Center for Advanced Aero-Engine, Beijing 100191, China and National Key Laboratory of Science and Technology on Aero-Engine Aero-thermodynamics, School of Energy and Power Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China;Collaborative Innovation Center for Advanced Aero-Engine, Beijing 100191, China |
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| Abstract: | Numerical computations of the lobed mixer were conducted to study the effects of interfacial contact area and streamwise vortices on the pumping ratio of lobed mixer. The numerical results showed that the greater interfacial contact area of primary flow and second flow caused the better performance of the lobed mixer, and the pumping ratio grew linearly with the increase of lobe perimeter ratio. The same effects were found in streamwise vortices, but the pumping ratio grew sharply and then gently with the increase of non-dimensional streamwise vortices intensity; and an index relationship was found between them. In case no flow separation occurred, the streamwise vortices angular kinetic energy of nozzle outlet increased with the increase of lobe angle, and there was a parabolic relationship between them. Moreover, the increase of lobe diffusion angle not only can increase the vorticity of streamwise vortices, but also enlarge the streamwise vortices distribution area. |
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| Keywords: | lobed mixer interfacial contact area streamwise vortices pumping ratio lobe angle |
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