The Effect of Unsteadiness on the Time-Mean Thermal Loads In A Turbine Stage Sverdrup Technology, Incorporated Lewis Research Center Group Brook Park, OH 44142

Format:

Conference/Event

Author/Creator:

Kirtley, K. R., author.

Conference Name:

Aerospace Atlantic Conference & Exposition (1993-04-20 : Dayton, Ohio, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 1993

Summary:

Two steady numerical analysis methods and one unsteady method are used to study the viscous three-dimensional flow in the middle stage of the Pratt and Whitney alternate design Space Shuttle Main Engine fuel turbine. The principal characteristic of this flow is that the secondary flows generated in the rotor blade reconfigure a radial inlet total temperature distortion into one with a pitchwise exit hot streak distortion. Secondary flows in the following vane redistribute the radial variation while unsteadiness causes a segregation of hot and cold flow from the hot streak within the vane. Such redistribution and segregation can lead to unexpected thermal loads and reduced durability. These physical phenomena and the ability of a steady analysis to capture them are investigated by performing a numerical experiment whereby the results of the two steady analysis methods are compared to the time-mean of the unsteady simulation. The flow physics related to the segregation and mixing of total temperature are discussed

Notes:

Vendor supplied data

Publisher Number:

931375

Access Restriction:

Restricted for use by site license