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http://dx.doi.org/10.5139/JKSAS.2007.35.2.124

Investigation on Prediction Methods for a Rotor Averaged Inflow in Forward Flight  

Hwang, Chang-Jeon (한국항공우주연구원 KHP개발실)
Chung, Ki-Hoon (한국항공우주연구원 KHP개발실)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.35, no.2, 2007 , pp. 124-129 More about this Journal
Abstract
Prediction methods for a rotor averaged inflow in forward flight are investigated in this study. The investigated methods are Drees linear inflow model, Mangler & Squire model and free vortex wake(FVW) method. Predictions have been performed for a four-blade rotor operating at three different advance ratios i.e. 0.15, 0.23 and 0.30, at which experimental data are available. According to results, Drees model has a limitation for the inflow non-uniformity prediction due to an inherent linear characteristics. Mangler & Squire model has a reasonable accuracy except the disk edge region. KARI FVW method has very good accuracy and has better accuracy than the other FVW method especially in inboard region. However, there are some discrepancies in retreating side due to the dynamic stall effect and in near hub region due to the fuselage upwash effect.
Keywords
Rotor Averaged Inflow; Forward Flight; Rotorcraft; Linear Model; Mangler & Squire Model; Free Vortex Wake;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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