Prediction of SA 349/2 GV blade loads in high speed flight using several rotor analysesThe influence of blade dynamics, dynamic stall, and transonic aerodynamics on the predictions of rotor loads in high-speed flight are presented. Data were obtained from an Aerospatiale Gazelle SA 349/2 helicopter with three Grande Vitesse blades. Several analyses are used for this investigation. First, blade dynamics effects on the correlation are studied using three rotor analyses which differ mainly in the method of calculating the blade elastic response. Next, an ONERA dynamic stall model is used to predict retreating blade stall. Finally, advancing blade aerodynamic loads are calculated using a NASA-developed rotorcraft analysis coupled with two transonic finite-difference analyses.
Document ID
19880035535
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Gaubert, Michel (Aerospatiale Division Helicopteres, Marignane, France)
Yamauchi, Gloria K. (NASA Ames Research Center Moffett Field, CA, United States)