Evaluation of factors affecting repeatability and accuracy of turbine rig test results.
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Authors
Eargle, Terry Paul
Subjects
Turbine Test Rig
Measurement Uncertainty
Condensation Effects
Measurement Uncertainty
Condensation Effects
Advisors
Shreeve, R.
Date of Issue
1980
Date
June 1980
Publisher
Monterey, CA; Naval Postgraduate School
Language
en_US
Abstract
An experimental study was carried out to resolve
anomalies and to determine the sources of inaccuracies
which had hitherto been present in results from the Turbine
Test Rig at the NPS Turbopropulsion Laboratory. Internal
modifications to the rig's waterbrake dynamometer are
reported which improved the RPM control everywhere but in
the range 17,000 - 18,500 RPM. From an analysis of test
results and theoretical estimates, it was concluded that
with normal atmospheric humidity supply temperatures close
to 700°R were necessary to eliminate the influence of water
condensation on blade row performance measurements, since
the stator nozzles were supersonic. A detailed uncertainty
analysis was carried out which successfully isolated the
major causes of inaccuracies in loss data derived from rig
measurements. Recommendations were made which, if followed,
should result in repeatable and accurate measurements of
blade row losses.
Type
Thesis
Description
Series/Report No
Department
Department of Aeronautics
Organization
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
Sponsors
Funder
Format
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.