Flow Field Investigation of a Rotating Helicopter Rotor Blade by Three-Component Laser-Doppler-Velocimetry

摘要: The measurement of three dimensional local flow vectors a blade tip vortex at positions near the helicopter rotor plane were performed with component laser-Doppler-velocimeter (3D LDV). A 'possition monitoring system' synchronized to rotation gave access motion parameters like lead-lag and pitching desired radial position blade. Mainly results concerning structure vortices obtained. measurements generated hover condition showed correctness 'time history' data acquisition, e.g. taking during time interval when one particular is passing location measuring volume LDV.