TY - CHAP
T1 - Wind Tunnel Analysis of Helicopter Aerodynamics with Varying Rotor Head Blade Stub Lengths
AU - Hartmann, Ulrich
AU - Ruhland, Johannes
AU - Breitsamter, Christian
N1 - Publisher Copyright:
© 2024, The Author(s), under exclusive license to Springer Nature Switzerland AG.
PY - 2024
Y1 - 2024
N2 - Experimental investigations are performed on a helicopter wind tunnel model for three rotor heads with different blade stub lengths. This investigation is intended to judge the influence of the blade stub spanwise dimension on the drag, lift, and especially pitching moment characteristics. Aerodynamic forces, moments, and the wake flow fields are analyzed. As expected, the longest blade stubs provide the highest drag and lift coefficient along the angle of attack polar, while both shorter blade stubs show a similar force course. The flow field of the largest rotor head exhibits pronounced blade tip vortices, which influence the pitching moment polar at high angles of attack. The medium and long stubs show a similar flow field, while the hubcap vortex dominates the smallest blade stub configuration.
AB - Experimental investigations are performed on a helicopter wind tunnel model for three rotor heads with different blade stub lengths. This investigation is intended to judge the influence of the blade stub spanwise dimension on the drag, lift, and especially pitching moment characteristics. Aerodynamic forces, moments, and the wake flow fields are analyzed. As expected, the longest blade stubs provide the highest drag and lift coefficient along the angle of attack polar, while both shorter blade stubs show a similar force course. The flow field of the largest rotor head exhibits pronounced blade tip vortices, which influence the pitching moment polar at high angles of attack. The medium and long stubs show a similar flow field, while the hubcap vortex dominates the smallest blade stub configuration.
KW - blade stubs
KW - helicopter
KW - rotor wake
UR - http://www.scopus.com/inward/record.url?scp=85172479039&partnerID=8YFLogxK
U2 - 10.1007/978-3-031-40482-5_58
DO - 10.1007/978-3-031-40482-5_58
M3 - Chapter
AN - SCOPUS:85172479039
T3 - Notes on Numerical Fluid Mechanics and Multidisciplinary Design
SP - 613
EP - 622
BT - Notes on Numerical Fluid Mechanics and Multidisciplinary Design
PB - Springer Science and Business Media Deutschland GmbH
ER -