Cascade Aerodynamic Loss Correlations Accounting for Turbine Disk Inclination

Abstract:

Turbine cascade aerodynamic losses are heavily related to incidence. Conventional researches have been focused on a single blade row upon the convention that the whole turbine cascade has a universal incidence for all blades on the cascade and accordingly the overall aerodynamic loss of the cascade is the same as a single blade row. However, there are exceptional situations in engineering practice that each blade of a turbine cascade has a different incidence. When a turbine disk is inclined to its design position due to manufacturing errors and/or operating malfunctions, the incidence for a blade on the cascade varies along the circumference of the turbine disk. For such case, the conventional research conclusions are no longer adequate. The present paper is motivated to extend the conventional researches to account for such case. Based on the-state-of-the-art works in this field, new sophisticated correlations for turbine cascade aerodynamic losses were developed to cope with the problems with turbine disk inclination. Numerical simulations were performed to examine the effects of turbine disk inclination on the aerodynamic losses. Beneficial conclusions and remarks are given in the end.

• Periodical: Applied Mechanics and Materials (Volume 575)
• Pages: 370-375
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.575.370
• Online since: June 2014
• Authors: Zhen Wei Yuan*, Jun Zhang, Dong Shuai Zhu
• Keywords: Aerodynamic Losses, Incidence, Turbine Cascade, Turbine Disk Inclination

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