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http://dx.doi.org/10.5139/JKSAS.2003.31.6.017

Forced Oscillation Wind Tunnel Test of a 50m Length Airship  

Chang,Byeong-Hee (한국항공우주연구원)
Lee,Yung-Gyo (한국항공우주연구원)
Ok,Ho-Nam (한국항공우주연구원)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.31, no.6, 2003 , pp. 17-22 More about this Journal
Abstract
An airship is statically unstable, because it has no wing, relatively small tails and a large hull. Hence, an accurate prediction of dynamic stability is critical. In this study, dynamic stability data of the 50m Length Airship were acquired through forced oscillation wind tunnel tests. The tests were done in Birhle Applied Research Inc's Lange Amplitude Multi-Purpose(BAR LAMP) Facility located in Germany. The tests were composed with 16 static runs and 26 dynamic runs. As results, it is obtained that dynamic characteristics of the airship depend on the sideslip angle, the angular rate and its direction as well as the angle of attack. Generally, three directional moments have damping, but the normal force, the side force, and the cross-derivatives are unstable. The dynamic derivatives are not sensitive to the control surfaces, but nonlinear to the sideslip angle.
Keywords
Dynamic Stability; Forced Oscillation; Wind Tunnel Test; Airship; DATCOM;
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