Data from the recent UH-60A Airloads Test in the National Full-Scale Aerodynamics Complex 40- by 80- Foot Wind Tunnel at NASA Ames Research Center are presented and compared to predictions computed by a loosely coupled Computational Fluid Dynamics (CFD)/Comprehensive analysis. Primary calculations model the rotor in free-air, but initial calculations are presented including a model of the tunnel test section. The conditions studied include a speed sweep at constant lift up to an advance ratio of 0.4 and a thrust sweep at constant speed into deep stall. Predictions show reasonable agreement with measurement for integrated performance indicators such as power and propulsive but occasionally deviate significantly. Detailed analysis of sectional airloads reveals good correlation in overall trends for normal force and pitching moment but pitching moment mean often differs. Chord force is frequently plagued by mean shifts and an overprediction of drag on the advancing side. Locations of significant aerodynamic phenomena are predicted accurately although the magnitude of individual events is often missed.


    Access

    Access via TIB

    Check availability in my library


    Export, share and cite



    Title :

    Correlating CFD Simulation with Wind Tunnel Test for the Full-Scale UH-60A Airloads Rotor


    Contributors:

    Conference:

    AHS 67th Annual Forum and Technology Display ; 2011 ; Virginia Beach, VA, United States


    Publication date :

    2011-05-03


    Type of media :

    Conference paper


    Type of material :

    No indication


    Language :

    English


    Keywords :


    Correlating CFD Simulation with Wind Tunnel Test for the Full-Scale UH-60A Airloads Rotor

    Chang, I.-C. / Norman, T. / Romander, E. et al. | British Library Conference Proceedings | 2011


    Full-Scale Wind Tunnel Test of the UH-60A Airloads Rotor

    Datta, A. / Norman, T. / Peterson, R. et al. | British Library Conference Proceedings | 2011


    Loads Correlation of a Full-Scale UH-60A Airloads Rotor in a Wind Tunnel

    Yeo, H. / Romander, E.A. / Vertical Flight Technical Society | British Library Conference Proceedings | 2012