Vortex ring state (VRS) is an inherently unsteady aerodynamic phenomenon. For rotor operations in the VRS, an inherent unsteadiness is a characteristic of the flow state, which is reflected by the waves and knots produced on the tip vortex filaments. Operationally, entry into the VRS manifests as rotor thrust fluctuations and also an increase in the average rotor shaft torque, the latter which is necessary to overcome the higher induced aerodynamic losses associated with rotor operations inside its own wake. Arming to the flight safety, the VRS development is discussed, the VRS models are summarized, and the operations for flight out VRS are given at the end of this paper. It is helpful to helicopter flight and training.
Study on the Vortex Ring State of Helicopter and Flight Training Operation
Advanced Materials Research ; 908 ; 245-248
2014-03-24
4 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Modeling of helicopter flight imitation in the vortex ring state
Springer Verlag | 2016
|Modeling of helicopter flight imitation in the vortex ring state
Online Contents | 2016
|Vortex ring state monitoring alarm processing prompting system in helicopter flight process
Europäisches Patentamt | 2022
|Prediction of Vortex Ring State Boundary of a Helicopter in Descending Flight by Simulation
Online Contents | 2008
|Engineering Index Backfile | 1958
|