Three-component force measurements on a large scramjet in a shock tunnel

Robinson, M. J., Mee, D. J., Tsai, C. Y. and Bakos, R. J. (2004) Three-component force measurements on a large scramjet in a shock tunnel. Journal of Spacecraft And Rockets, 41 3: 416-425. doi:10.2514/1.10699

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Author Robinson, M. J.
Mee, D. J.
Tsai, C. Y.
Bakos, R. J.
Title Three-component force measurements on a large scramjet in a shock tunnel
Journal name Journal of Spacecraft And Rockets   Check publisher's open access policy
ISSN 0022-4650
Publication date 2004-01-01
Sub-type Article (original research)
DOI 10.2514/1.10699
Open Access Status File (Author Post-print)
Volume 41
Issue 3
Start page 416
End page 425
Total pages 10
Editor E. V. Zoby
Maguire
Place of publication USA
Publisher American Institute of Aeronautics and Astronautics, Inc
Language eng
Subject C1
290201 Aerodynamics
671401 Scientific instrumentation
Abstract A stress-wave force balance for measurement of thrust, lift, and pitching moment on a large scramjet model (40 kg in mass, 1.165 in in length) in a reflected shock tunnel has been designed, calibrated, and tested. Transient finite element analysis was used to model the performance of the balance. This modeling indicates that good decoupling of signals and low sensitivity of the balance to the distribution of. the load can be achieved with a three-bar balance. The balance was constructed and calibrated by applying a series of point loads to the model. A good comparison between finite element analysis and experimental results was obtained with finite element analysis aiding in the interpretation of some experimental results. Force measurements were made in a shock tunnel both with and without fuel injection, and measurements were compared with predictions using simple models of the scramjet and combustion. Results indicate that the balance is capable of resolving lift, thrust, and pitching moments with and without combustion. However vibrations associated with tunnel operation interfered with the signals indicating the importance of vibration isolation for accurate measurements.
Keyword Engineering, Aerospace
Impulse Facilities
Boundary-layer
Balance
Drag
Flows
Q-Index Code C1

 
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Created: Wed, 15 Aug 2007, 14:08:16 EST