Dynamic inflow modeling in rotorcraft flight dynamics is a means of accounting for the low-frequency wake effects under unsteady or transient conditions. This report considers dynamic inflow and its influence on some problems of rotorcraft flight dynamics. The bases of modeling range from a simple empirical formulation to an involved prescribed-wake, discrete-vortex analysis of a four-bladed rotor. The emphasis is on perturbed linear versions of inflow in matrix form and on the sensitivity of low-frequency stability and response to inflow. However, non-linear versions for use in time-history solutions are presented. Coverage also includes the areas of weakness, controversial notions, and the need for additional test data on rotor-body damping in forward flight for a better appreciation of the developments in modeling dynamic inflow.
Review of Dynamic Inflow Modeling for Rotorcraft Flight Dynamics
1986
29 pages
Report
Keine Angabe
Englisch
Aerodynamics , Aeronautics , Air flow , Rotary wing aircraft , Wake , Transients , Vortices , Perturbations , Downwash , Dynamic response , Damping , Level flight , Hovering , Autorotation , Matrices(Mathematics) , Mathematical models , Reprints , Dynamic inflow models , Forward flight , Flight dynamics , Lag damping
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