| 小流量条件下汽轮机多级三维粘性流场的数值分析 |
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| 引用本文： | 王继宏,陈佐一. 小流量条件下汽轮机多级三维粘性流场的数值分析[J]. 工程热物理学报, 1997, 0(5) |
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| 作者姓名： | 王继宏 陈佐一 |
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| 作者单位： | 清华大学热能工程系!北京100084 |
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| 摘 要： | 1绪言小流量条件下汽轮机内部流动具有比设计条件下更为复杂的特征，最突出的表现是随冲角的增大而出现的分离流、先速流。这种流态不仅影响汽轮机的运行效率，更重要的是它还与汽轮机的安全可靠性密切相关，它可能诱发叶片的失速颤振而使叶片断裂。虽然大的负攻角所引起的本级叶片的脱流现象已成共识，但对小流量条件下汽轮机内部流动的认识只有一些实验观测到的现象和二维的数值分析，并且只限于末级叶片。在文献＊中，我们对某一汽轮机低压缸末级和次末级叶片在0．35小流量工况下的两级流场进行了三维粘性数值分析，计算得到的分离流态同…
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| 关 键 词： | N-S方程 参数多项式方法 多级流动 小流量 |
NUMERICAL ANALYSIS OF 3D VISCOUS FLOW THROUGH MULTISTAGE TURBOMACHINES AT SMALL FLOW RATE |
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| WANG Jihong CHEN Zuoyi. NUMERICAL ANALYSIS OF 3D VISCOUS FLOW THROUGH MULTISTAGE TURBOMACHINES AT SMALL FLOW RATE[J]. Journal of Engineering Thermophysics, 1997, 0(5) |
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| Authors: | WANG Jihong CHEN Zuoyi |
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| Affiliation: | Department of Thermal Engineerng Tsinghua Univerity Beijing 100084 |
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| Abstract: | Parametric Polynomial Method is used to analyze the three dimensional viscous flow through multistage turbomachines. Three high pressure stages in a 20MW steam turbine are calculated at design flow rate and small llow rate (G/G0 = 0.3). Large separated flow is predicted in the passage at small flow rate. The result shows that the upstream flow has a conspicuous effect on the downstream flow, so the multbetage fiow calculating is necessary |
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| Keywords: | N-S equations Parametric Polynomial Method multistage flow small flow rate |
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