Measurement of turbofan/turbojet thrust from tailpipe statistic pressure
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Author
Givens, Todd Williams
LeMoine, John A.
Date
1984-12Advisor
Biblarz, O.
Second Reader
Gawain, T.H.
Metadata
Show full item recordAbstract
The most accurate method for measuring turbojet/turbofan thrust is mechanical. A more practical
method is often desired , however, since a mechanical device is costly and non-portable. An
investigation was conducted to determine whether inferring thrust indirectly from pressure provides
sufficient accuracy to justify its use as an alternate technique for determining uninstalled
thrust.
TF41 engine data were provided by the Naval Air Rework
Facility at Jacksonville, Florida. The data consisted of a
The most accurate method for measuring turbojet/turbofan thrust is mechanical. A more practical method is often desired , however, since a mechanical device is costly and non-portable. An investigation was conducted to determine whether inferring thrust indirectly from pressure provides sufficient accuracy to justify its use as an alternate technique for determining uninstalled thrust. TF41 engine data were provided by the Naval Air Rework
Facility at Jacksonville, Florida. The data consisted of a variety of engine parameters which had been recorded during routine post-maintenance performance tests plus an
additional set of tailpipe static pressure readings that had been obtained from a "slave" tailpipe used for this project. It was decided to approach the data evaluation empirically. The engine data were combined and an ensemble plot of tailpipe static pressure versus thrust was produced for analysis. A curve fitting technique was then employed to determine how well the parameter correlated with thrust. The results were tested statistically and found to be reasonable. Correlation between thrust and
tailpipe static pressure was excellent.
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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.NPS Report Number
NPS67-84-019Collections
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