Actions for Study of Low Reynolds Number Effects on the Losses in Low-Pressure Turbine Blade Rows

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Study of Low Reynolds Number Effects on the Losses in Low-Pressure Turbine Blade Rows

Author
Ashpis, David E.
Published
Jun. 1998.
Physical Description
1 electronic document
Additional Creators
Dorney, Daniel J.
Online Version

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Summary
Experimental data from jet-engine tests have indicated that unsteady blade row interactions and separation can have a significant impact on the efficiency of low-pressure turbine stages. Measured turbine efficiencies at takeoff can be as much as two points higher than those at cruise conditions. Several recent studies have revealed that Reynolds number effects may contribute to the lower efficiencies at cruise conditions. In the current study numerical experiments have been performed to study the models available for low Reynolds number flows, and to quantify the Reynolds number dependence of low-pressure turbine cascades and stages. The predicted aerodynamic results exhibit good agreement with design data.
Other Subject(s)
Collection
NASA Technical Reports Server (NTRS) Collection.
Note
Document ID: 19980210597.
E-11202.
NAS 1.15:207919.
AIAA Paper 98-3575.
NASA/TM-1998-207919.
Joint Propulsion Conference and Exhibit; 12-15 Jul. 1998; Cleveland, OH; United States.
Terms of Use and Reproduction
No Copyright.
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