NDLI: Flow Measurements in a First Stage Nozzle Cascade Having Leakage and Assembly Features: Effects of Endwall Steps and Leakage on Aerodynamic Losses

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Piggush, J. D. Simon, T. W.
Copyright Year	2005
Abstract	This work supports new gas turbine designs for improved performance by evaluating endwall leakage and assembly features in a cascade that is representative of a first stage stator passage. The present paper documents component misalignment and leakage flow effects on the aerodynamic losses within a passage having one contoured and one straight endwall. Steps on the endwall and leakage flows through the endwall can lead to thicker endwall boundary layers, stronger secondary flows and possibly additional vortex structures in the passage. The paper compares losses with steps of various geometries and leakage of various flow rates to assess their importance on aerodynamic losses in this contoured passage. In particular, features associated with the combustor-to-turbine transition piece and the slash-face gap, a gap between two vane segments on the vane platform, are addressed.
Sponsorship	Heat Transfer Division
Starting Page	525
Ending Page	534
Page Count	10
File Format	PDF
ISBN	0791842215
DOI	10.1115/IMECE2005-83032
e-ISBN	0791837696
Volume Number	Heat Transfer, Part A
Conference Proceedings	ASME 2005 International Mechanical Engineering Congress and Exposition
Language	English
Publisher Date	2005-11-05
Publisher Place	Orlando, Florida, USA
Access Restriction	Subscribed
Subject Keyword	Leakage Cascades (fluid dynamics) Flow measurement Flow (dynamics) Gas turbines Vortices Stators Nozzles Manufacturing Leakage flows Combustion chambers Boundary layers Turbines
Content Type	Text
Resource Type	Article

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