NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Collections About News Help Login
Back to Results
Aerodynamic Synthesis of a Centrifugal Impeller Using CFD and MeasurementsThe performance and flow structure in an unshrouded impeller of approximately 4:1 pressure ratio is synthesized on the basis of a detailed analysis of 3D viscous CFD results and aerodynamic measurements. A good data match was obtained between CFD and measurements using laser anemometry and pneumatic probes. This solidified the role of the CFD model as a reliable representation of the impeller internal flow structure and integrated performance. Results are presented showing the loss production and secondary flow structure in the impeller. The results indicate that while the overall impeller efficiency is high, the impeller shroud static pressure recovery potential is underdeveloped leading to a performance degradation in the downstream diffusing element. Thus, a case is made for a follow-on impeller parametric design study to improve the flow quality. A strategy for aerodynamic performance enhancement is outlined and an estimate of the gain in overall impeller efficiency that might be realized through improvements to the relative diffusion process is provided.
Document ID
19970025160
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Larosiliere, L. M. (Army Research Lab. Cleveland, OH United States)
Skoch, G. J. (Army Research Lab. Cleveland, OH United States)
Prahst, P. S. (NYMA, Inc. Brook Park, OH United States)
Date Acquired
September 6, 2013
Publication Date
July 1, 1997
Subject Category
Aircraft Propulsion And Power
Report/Patent Number
NAS 1.15:107515
AIAA Paper 97-2878
E-10818
ARL-TR-1461
NASA-TM-107515
Meeting Information
Meeting: Joint Propulsion Conference and Exhibit
Location: Seattle, WA
Country: United States
Start Date: July 6, 1997
End Date: July 9, 1997
Sponsors: American Society of Mechanical Engineers, American Inst. of Aeronautics and Astronautics, Society of Automotive Engineers, Inc., American Society for Electrical Engineers
Accession Number
97N24783
Funding Number(s)
PROJECT: RTOP 523-22-13
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

Related Records

There are no records associated with this record.
No Preview Available