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http://dx.doi.org/10.5139/JKSAS.2009.37.7.615

Numerical Investigation on Interference Effects of Tandem Rotor in Forward Flight  

Lee, Jae-Won (부산대학교 기계기술연구원)
Oh, Se-Jong (부산대학교 항공우주공학과)
Yee, Kwan-Jung (부산대학교 항공우주공학과)
Kim, Deog-Kwan (한국항공우주연구원)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.37, no.7, 2009 , pp. 615-626 More about this Journal
Abstract
The objective of this study is to investigate the interference effects due to tandem rotor's overlap in the forward flight. To resolve the instabilities caused by close proximity of the wake to the blade surface, the field velocity approach is implemented to the existing unsteady panel code coupled with a time-marching free wake model. The modified code is then used to investigate the effects of the selected parameters on the forward flight performance of the tandem rotor. The calculated results for rotor separation effect indicate that stagger(d/D) appears to have little effects on the forward flight performance at high advance ratio and the square of gap(H/D) is inversely proportional to overlap induced power factor. In addition, it is also shown that the overlap induced power factor increases to a certain extent and decrease back as the advance ratio increases.
Keywords
Rotor Interference; Unsteady Panel Method; Time-Marching Free-Wake; Tandem Rotor; Rotor Overlap Effect; Field Velocity Approach;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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