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Radial turbine coolingRadial turbines have been used extensively in many applications including small ground based electrical power generators, automotive engine turbochargers and aircraft auxiliary power units. In all of these applications the turbine inlet temperature is limited to a value commensurate with the material strength limitations and life requirements of uncooled metal rotors. To take advantage of all the benefits that higher temperatures offer, such as increased turbine specific power output or higher cycle thermal efficiency, requires improved high temperature materials and/or blade cooling. Extensive research is on-going to advance the material properties of high temperature superalloys as well as composite materials including ceramics. The use of ceramics with their high temperature potential and low cost is particularly appealing for radial turbines. However until these programs reach fruition the only way to make significant step increases beyond the present material temperature barriers is to cool the radial blading.
Document ID
19930004104
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Roelke, Richard J.
(NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
September 6, 2013
Publication Date
April 1, 1992
Subject Category
Aerodynamics
Report/Patent Number
NASA-TM-105658
NAS 1.15:105658
E-7022
Meeting Information
Meeting: Lecture Series on Radial Turbines at the von Karman Inst. for Fluid Dynamics
Location: Brussels
Country: Belgium
Start Date: April 6, 1992
End Date: April 10, 1992
Accession Number
93N13292
Funding Number(s)
PROJECT: RTOP 535-05-10
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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