Review of Dynamic Wake Models For Application to Dynamics and Stability of Rotorcraft
WASHINGTON UNIV ST LOUIS MO DEPT OF MECHANICAL ENGINEERING
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Since the introduction of dynamic inflow in the early 1970s, a fair amount of attention has been given to rotor induced flow models that are hierarchical and can be presented in state-space form. The original, heuristic, 3-state models of the 1970s gave way to the Pitt-Peters models of the 1980s that were hierarchical and could have as many as 8 states. In the late 1980s and early 1990s, the Peters-He models became completely hierarchical with as many states as desired. In more recent years, the emphasis has been on amending the model to include curved wakes, ground effect, and previously neglected states. Part of this development has necessarily involved computation of flow off of the rotor disk by the state-space approach. This paper reviews the developments up until now.
- Fluid Mechanics