| Author Name | Affiliation | | TANG Hong-fei | School of Energy Science and Engineering,Harbin Institute of Technology,Harbin 150001,China | | HUANG Hong-yan | School of Energy Science and Engineering,Harbin Institute of Technology,Harbin 150001,China | | WANG Zhen-feng | School of Energy Science and Engineering,Harbin Institute of Technology,Harbin 150001,China | | HAN Wan-jin | School of Energy Science and Engineering,Harbin Institute of Technology,Harbin 150001,China |
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| Abstract: |
| To improve the performance of the Turbofan engine,several measures should be considered during design process.Such measures,relating to aerodynamic characteristic design,include the maximum enthalpy per stage,the shortest axial length,the minimum blade rows and the highest efficient in design and off design condition.To satisfy theses design characters,the meridian geometry of the engine will be excurvature at a high degree transition part between HP and LP turbines.The study is to investigate the effect of blade bowing on flow loss at blade tip and root of the type of turbine.Such turbine,tending towards separation,with severe secondary flow at the tip and strong radial flow at exit,was simulated by the 3D N-S solver Numerca,and there were several different stacking line bowing schemes in all.The results show that tip negative bowing and root positive bowing is able to weaken radial flow,consequently reduce the flow loss at the tip and root. |
| Key words: meridional expansion spanwise flow bowed blade low-pressure turbine numerical simulation |
| DOI：10.11916/j.issn.1005-9113.2010.05.026 |
| Clc Number:V231.3 |
| Fund: |
