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Performance predictions and acoustic analysis of the HVAB rotor in hover

  • Mali, Hajar (LERMA Lab., School of Aerospace Engineering, International University of Rabat) ;
  • Benmansour, Kawtar (LERMA Lab., School of Aerospace Engineering, International University of Rabat) ;
  • Elsayed, Omer (LERMA Lab., School of Aerospace Engineering, International University of Rabat) ;
  • Qaissi, Khaoula (LERMA Lab., School of Aerospace Engineering, International University of Rabat)
  • Received : 2022.04.05
  • Accepted : 2022.09.14
  • Published : 2022.07.25
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Abstract

This work presents a numerical investigation of the aerodynamics and aero acoustics of the HVAB rotor in hover conditions. Two fully turbulent models are employed, the one-equation Spalart-Allmaras model and the two-equation k-ω SST model. Transition effects are investigated as well using the Langtry-Menter γ-Re θt transition transport model. The noise generation and propagation are being investigated using the Ffows-Williams Hawking model for far-field noise and the broadband model for near-field noise. Comparisons with other numerical solvers and with the PSP rotor test data are presented. The results are presented in terms of thrust and power coefficients, the figure of merit, surface pressure distribution, and Sound pressure level. Velocity, pressure, and vortex structures generated by the rotor are also shown in this work. In addition, this work investigates the contribution of different blade regions to the overall noise levels and emphasizes the importance of considering specific areas for future improvements.

Keywords

Acknowledgement

Special thanks go to Dr. Lakshmi Sankar at Georgia Institute of Technology and Dr. Po Wei Chen at ANSYS for their constructive feedback and guidance.