A broad engineering validation study of the structural and aerodynamic capabilities of the Second Generation Comprehensive Helicopter Analysis System (2GCHAS) has been conducted. 2GCHAS predictions for structural deflections, aeroelastic stability, rotor performance, and blade airloads were compared with experimental data ranging from small-scale model data to full-scale wind tunnel and flight test data. Correlation with the Princeton beam test data confirmed that 2GCHAS gave satisfactory results for moderate deformations of nonlinear structures. A small-scale torsionally soft hingeless rotor blade test model was correlated with 2GCHAS aeroelastic stability results and confirmed the 2GCHAS capability to predict aeromechanical stability of a hingeless rotor system. For unsteady aerodynamics, 3-D wing dynamic stall wind tunnel data for an oscillating wing confirmed the 2GCHAS dynamic stall and unsteady wake modeling capability. Rotor performance predictions were correlated with full-scale wind tunnel data for the S-76 rotor. Rotor blade loads and airloads predictions were evaluated using CH-47C model rotor blade data and UH-60 full-scale flight test data. Overall, the results indicated generally satisfactory prediction capabilities for a wide range of rotorcraft problems using 2GCHAS.
Correlation of 2GCHAS analysis with experimental data
Korrelation der 2GCHAS(Second Generation Comprehensive Helicopter Analysis System)-Analyse mit experimentellen Daten
Journal of the American Helicopter Society ; 40 , 4 ; 18-33
1995
16 Seiten, 16 Bilder, 18 Quellen
Aufsatz (Zeitschrift)
Englisch
Hubschrauber , Strukturanalyse , Korrelation , Rechnerprogramm , Vergleichsmessung , Aerodynamik , Rotor (Drehflügel) , Betriebsverhalten , dynamische Stabilität , elastische Verformung , Windkanal , Nichtlinearität , Versuchsmodell , Torsion , Aeromechanik , instationäre Strömung , Abreißen der Strömung , Validierung
Correlation of 2GCHAS Analysis with Experimental Data
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