| 小型高速离心压气机级内部的三维流场分析 |
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| 引用本文： | 楚武利,吴艳辉,卢新根.小型高速离心压气机级内部的三维流场分析[J].应用力学学报,2006,23(4):511-515. |
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| 作者姓名： | 楚武利 吴艳辉 卢新根 |
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| 作者单位： | 西北工业大学,西安,710072 |
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| 基金项目： | 国家自然科学基金(编号:50506026)，航空科学基金(编号:05C53016) |
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| 摘 要： | 利用三维数值模拟技术对微型燃气轮机中的离心压气机部分进行了数值分析,得到了离心压气机设计转速下的级特性曲线和各通流部件中的流动情况。数值分析表明:设计转速下压气机的级特性非常陡峭;整个特性线范围内离心叶轮基本在亚音速情况下工作,而径向扩压器是在跨音速条件下工作,离心压气机整机的最大流量是由径向扩压器的喉部面积决定的;离心压气机级内部各通流部件之间流动的相互干扰是引起流动分离的重要原因,各通流部件之间流动的相互匹配和协调将决定了离心压气机整机的性能和稳定性。
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| 关 键 词： | 离心压气机 三维流动 数值模拟 |
| 文章编号： | 1000-4939（2006）04-0511-05 |
| 收稿时间： | 2005-03-24 |
| 修稿时间： | 2005-03-242005-10-30 |
Numerical Investigation to Small High Speed Centrifugal Compressor |
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| Chu Wuli,Wu Yanhui,Lu Xingen.Numerical Investigation to Small High Speed Centrifugal Compressor[J].Chinese Journal of Applied Mechanics,2006,23(4):511-515. |
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| Authors: | Chu Wuli Wu Yanhui Lu Xingen |
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| Abstract: | The performance and three-dimensional viscous flow-field of the centrifugal compressor stage in a micro-turbine are investigated numerically.The primary parameters of the compressor are revealed.The numerical results indicate that the stage is endowed with steep working characteristics.In the whole flow range,the impeller operates under subsonic condition and the radial diffuser operates under transonic condition,thus the choked mass flow rate is determined by the throat area of the radial diffuser.The interactions between different through-flow parts(impeller,radial diffuser,axial diffuser) exert significant influence on the flow in the two diffusers and result in a bigger separation range near hub elements,which dominate the performance and stability during the whole stage. |
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| Keywords: | centrifugal compressor 3-D flow numerical simulation |
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