Experimental Investigations on the Aerodynamic Performance of the Aft-Loaded and Fore-Loaded Turbine Cascades

孙奇 1; 李军 2; 孔祥林 1; 江生科 1; 王建录 1; 丰镇平 2

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Experimental Investigations on the Aerodynamic Performance of the Aft-Loaded and Fore-Loaded Turbine Cascades

更新时间：2025-12-08

- Experimental Investigations on the Aerodynamic Performance of the Aft-Loaded and Fore-Loaded Turbine Cascades
- Vol. 41, Issue 1, Pages: 23-27(2007)
- 作者机构：
  
  东方汽轮机厂产品开发处,德阳,618001
- 作者简介：
- 基金信息：
- DOI：
  CLC： TK262
- Online First：10 January 2007，
  
  Published：2007
- 稿件说明：
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孙奇 1, 李军 2, 孔祥林 1, et al. Experimental Investigations on the Aerodynamic Performance of the Aft-Loaded and Fore-Loaded Turbine Cascades[J]. 2007, 41(1): 23-27.
DOI：

孙奇 1, 李军 2, 孔祥林 1, et al. Experimental Investigations on the Aerodynamic Performance of the Aft-Loaded and Fore-Loaded Turbine Cascades[J]. 2007, 41(1): 23-27. DOI：

摘要

采用平面叶栅和环形叶栅吹风试验对后加载和高负荷前加载叶型的气动性能进行了详细的测量和研究.在平面叶栅吹风试验中

测量了2种叶型的压力系数分布

研究了攻角、相对栅距、安装角和马赫数的变化对叶型能量损失系数的影响规律.在环形叶栅吹风试验中

测量了2种叶型的近叶顶、中叶高和近叶根处的压力系数分布以及能量损失系数沿叶高的变化规律.对后加载和高负荷前加载叶型的三维成型规律进行了讨论.试验结果表明:高负荷前加载叶型相对于后加载叶型具有更大的负荷特性; 高负荷前加载叶型在采用较大的切向弯曲后可以抑制二次流的发展和减少二次流损失; 前加载叶型和后加载叶型均具有优良的气动性能.研究结果对于拓宽高性能叶型在汽轮机中的应用提供了理论基础和技术支持.

Abstract

The aerodynamic performance of the aft-loaded and fore-loaded turbine blade was investigated using the linear and annular turbine cascades experiments.The linear cascade experimental rig was utilized to measure the pressure distribution along the aft-loaded and fore-loaded turbine blade.Moreover

the effects of the variations of the cascade pitch

stagger angle

attack angle and Mach number on the efficiency of aft-loaded and fore-loaded turbine blade were examined.The annular cascade experimental rig was applied to measure the pressure distribution along the aft-loaded and fore-loaded turbine blade at the near tip

mid-span and near hub three typical blade heights.The energy loss coefficients distribution along the blade height was also measured for both the aft-loaded and fore-loaded blades.Further

the effects of the three-dimensional curved stacking method on the cascade performance were discussed according to the annular experimental results.The results show that the larger circumferential bowed blade can be able to suppress the secondary flow loss and improve the aerodynamic performance for the fore-loaded turbine blade.In addition

the load of the fore-loaded blade was higher than that of the aft-loaded blade.

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Keywords

references

Hashimoto K, Kimura T.Preliminary study on forward loaded cascades designed with inverse method for low pressure turbine[C]∥29th International Gas Turbine Conference and Exhibit.New York: ASME, 1984.

徐星仲, 朱斌, 蒋洪德,等.一种“后部加载型”透平静叶设计[J].工程热物理学报, 1997, 18(1): 48-51.

Xu Xingzhong, Zhu Bin, Jiang Hongde, et al.Design of aft-loaded turbine blade[J].Journal of Engineering Thermophysics, 1997,18(1):48-51.

李卫华.后加载叶栅气动特性的环形叶栅试验研究与数值模拟[D].西安:西安交通大学能源与动力工程学院,2004.

Howell R J, Ramesh O N, Hodson H P, et al.High lift and aft-loaded profiles for low-pressure turbines[J].ASME Journal of Turbomachinery, 2001, 123(2): 181-188.

Jouini D B M, Sjolander S A, Moustapha S H. Midspan flow-field measurements for two transonic linear turbine cascades at off-design conditions[J].ASME Journal of Turbomachinery, 2002, 124(2): 176-186.

Corriveau D, Sjolander S A.Influence of loading distribution on the performance of transonic high pressure turbine blades[J].ASME Journal of Turbomachinery, 2004, 126(2): 288-296.

孙奇.前加载和后加载叶栅气动特性的试验和数值研究[D].西安:西安交通大学能源与动力工程学院,2005.

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