Linear perturbation method for performance analysis of variable geometry gas turbines

Authors: Qiu, C.¹; Song, H. F.²; Weng, S. L.²

Source: Journal of the Energy Institute, Volume 82, Number 3, September 2009 , pp. 168-175(8)

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Abstract:

With the ever-increasing pressure for higher efficient and more powerful engines, great interest has been paid to the conversion of existing gas turbines into complex cycle gas turbines. During these conversions, stators stagger angles usually need to be adjusted. The reason is that turbines usually need to be adjusted according to the transformation of the corresponding compressors. Therefore, the performance analysis of gas turbines with variable stators is necessary. A new approach aimed at solving this problem is presented. It is based on the linear perturbation method and can be used easily to predict the performance. To prove this, a three-spool gas turbine is taken as an example. The gas turbines with variable stators used in different turbines have been analysed. The new method exhibits good results for the problems considered and is proved to be effective.

Keywords: LINEAR PERTURBATION METHOD; VARIABLE GEOMETRY GAS TURBINE; VARIABLE STATOR

Document Type: Research Article

DOI: http://dx.doi.org/10.1179/014426009X12448168550028

Affiliations: 1: Institute of Turbomachinery, School of Mechanical Engineering, Shanghai Jiaotong University, 800 Dongchuan Road, Shanghai 200240, China;, Email: cqiu@sjtu.edu.cn 2: Institute of Turbomachinery, School of Mechanical Engineering, Shanghai Jiaotong University, 800 Dongchuan Road, Shanghai 200240

Publication date: 2009-09-01

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