TY - GEN
T1 - Modeling of rotor dynamic wake distortion during maneuvering flight
AU - Prasad, J. V.R.
AU - Zhao, Jinggen
AU - Peters, David A.
PY - 2001
Y1 - 2001
N2 - In this paper, modeling of rotor dynamic wake distortion during maneuvering flight is considered. The growth of induced inflow gradient over the rotor during transient maneuvers is examined using free wake analysis, which indicates that the transient wake effects can be approximated using fist order equations for wake curvature and wake skew. The coupling between wake skew and wake curvature effects is also investigated using system identification in both hover and low speed forward flight. Identified models indicate that there are strong interactions between wake bending and wake skew in both hover and forward flight. To account for the influence of dynamic wake distortion effects, the dynamic inflow model for steady maneuvering flight is augmented by including three additional states, viz., longitudinal and lateral wake curvatures and wake skew. The influence of dynamic wake distortion effects on both on-and off-axis blade flapping response is investigated, which agrees with the experimentally observed sign reversal in off-axis response.
AB - In this paper, modeling of rotor dynamic wake distortion during maneuvering flight is considered. The growth of induced inflow gradient over the rotor during transient maneuvers is examined using free wake analysis, which indicates that the transient wake effects can be approximated using fist order equations for wake curvature and wake skew. The coupling between wake skew and wake curvature effects is also investigated using system identification in both hover and low speed forward flight. Identified models indicate that there are strong interactions between wake bending and wake skew in both hover and forward flight. To account for the influence of dynamic wake distortion effects, the dynamic inflow model for steady maneuvering flight is augmented by including three additional states, viz., longitudinal and lateral wake curvatures and wake skew. The influence of dynamic wake distortion effects on both on-and off-axis blade flapping response is investigated, which agrees with the experimentally observed sign reversal in off-axis response.
UR - https://www.scopus.com/pages/publications/84894469138
M3 - Conference contribution
AN - SCOPUS:84894469138
SN - 9781563479458
T3 - AIAA Atmospheric Flight Mechanics Conference and Exhibit
BT - AIAA Atmospheric Flight Mechanics Conference and Exhibit
T2 - AIAA Atmospheric Flight Mechanics Conference and Exhibit 2001
Y2 - 6 August 2001 through 9 August 2001
ER -