Performance Improvement of a Degraded Heavy Duty Gas Turbine Using CFD Design Tools
In recent years a great deal of efforts have been done by gas turbine manufacturers and power plant owners to increase the performance of their existing turbines. One common way to increase profitability of an existing machine, which has been degraded over the years of operation, is increasing its efficiency and output by replacing the critical components during the major overhauls. The main priority in such a process Is to redesign components with less geometric and manufacturing changes. This issue is the main object of this study. This study represents an aerodynamic redesign process of a heavy duty gas turbine. The focus of this work is to utilize available numerical tools to perform the redesign process while the cost of replacing and manufacturing of the redesigned parts remains at the lowest value. Therefore, aerodynamic of the existing machine is detailed using a 3D CFD solver and experimental data provided by GT manufacturer and field data. At first, sources of all losses in all rows are identified. Then, thermal and manufacturing constrains that confine changing the current geometry are investigated in detail. Also, some well established correlations of profile, secondary, and tip clearance losses are compared with CFD results to obtain the best model for performance calculation of such a large-scale turbine. The selected models are used to develop a simple design tool appropriate for heavy duty large scale turbines.
axial turbine CFD optimization aerodynamic
Hamid Motamedi Zoka Mohammadreza Shirzadi
Product Design Engineer,MAPNA Turbine Blade Company (PARTO),Karaj, Iran Turbine Design, MAPN A Turbine Engineering and Manufacturing,Karaj, Iran
国际会议
4th International Symposium on Jet Propulsion and Power Engineering(第四届喷气推进与动力工程国际会议 ISJPPE2012)
西安
英文
124-130
2012-09-10（万方平台首次上网日期，不代表论文的发表时间）