Profile Loss Correlations Accounting for Turbine Disk Inclination

Abstract:

Incidence can significantly affect turbine cascade aerodynamic losses, including profile, secondary and tip-clearance losses. In previous works, correlations for these losses were developed on a convention that the whole cascade has a universal incidence angle. But in reality, there exist exceptional situations when a turbine disk is inclined to its design position. In such cases, the incidence varies with the location of blade on the circumference, leading to loss deviation from its design value. The present paper is motivated to work out new correlations for the profile losses with turbine disk inclinations and examine the effects of turbine disk inclination. Based on the state-of-the-art works, new correlations are developed to take into account the incidence variation by redefining the inlet flow angle in terms of turbine disk inclination angle and location angle of blade on turbine disk circumference. The effects of turbine disk inclination on profile losses were examined through numerical simulations. It is concluded that the turbine disk inclination has considerable influences on the profile losses of turbine cascade.

• Periodical: Applied Mechanics and Materials (Volume 529)
• Pages: 159-163
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.529.159
• Online since: June 2014
• Authors: Zhen Wei Yuan*, Jun Zhang, Dong Shuai Zhu
• Keywords: Aerodynamic Losses, Incidence, Profile Losses, Turbine Cascade, Turbine Disk Inclination

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