NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Unsteady Probabilistic Analysis of a Gas Turbine SystemIn this work, we have considered an annular cascade configuration subjected to unsteady inflow conditions. The unsteady response calculation has been implemented into the time marching CFD code, MSUTURBO. The computed steady state results for the pressure distribution demonstrated good agreement with experimental data. We have computed results for the amplitudes of the unsteady pressure over the blade surfaces. With the increase in gas turbine engine structural complexity and performance over the past 50 years, structural engineers have created an array of safety nets to ensure against component failures in turbine engines. In order to reduce what is now considered to be excessive conservatism and yet maintain the same adequate margins of safety, there is a pressing need to explore methods of incorporating probabilistic design procedures into engine development. Probabilistic methods combine and prioritize the statistical distributions of each design variable, generate an interactive distribution and offer the designer a quantified relationship between robustness, endurance and performance. The designer can therefore iterate between weight reduction, life increase, engine size reduction, speed increase etc.
Document ID
20040152122
Document Type
Other
Authors
Brown, Marilyn (Cleveland State Univ. Cleveland, OH, United States)
Date Acquired
August 22, 2013
Publication Date
January 1, 2003
Publication Information
Publication: 2003 NASA Faculty Fellowship Program at Glenn Research Center
Subject Category
Aircraft Propulsion and Power
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Document Inquiry