Experimental and numerical investigation of co-axial rotor interaction to thrust

Soydan A., Sahin H., Bicer B., Sanozkan S., Şahin M.

PROGRESS IN COMPUTATIONAL FLUID DYNAMICS, vol.22, no.5, pp.317-330, 2022 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 22 Issue: 5
  • Publication Date: 2022
  • Doi Number: 10.1504/pcfd.2022.125735
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Aerospace Database, CAB Abstracts, Communication Abstracts, Compendex, INSPEC, Metadex, zbMATH, DIALNET, Civil Engineering Abstracts
  • Page Numbers: pp.317-330
  • Keywords: multi-rotor, coaxial rotor, OpenFOAM, RANS, sliding mesh, hover flight, AERODYNAMIC CHARACTERISTICS, TURBULENCE MODELS, PERFORMANCE, HOVER
  • Istanbul Technical University Affiliated: Yes


The experimental and numerical computational investigation of co-axial rotor performance has been increased over the past decade in order to understand complex interactions in co-axial rotor flows to improve design of unmanned-aerial vehicles. Nevertheless, the issues related rotor aerodynamic performance, wake interactions, etc. are not well understood. In the current work, aerodynamic interactions in co-axial rotor have been investigated with both experimental and numerical methods in hover flight by varying tip diameters, rpm, axial distance, etc. In order to calculate the co-axial thrust efficiency, in-house test bench has been created. On the numerical side, the three-dimensional unsteady Navier-Stokes equation is solved using a pressure-based, segregated, compressible and time-accurate solver of OpenFOAM. A sliding mesh interface procedure is utilised to link rotating regions and SST k - omega model is employed for the turbulence modelling. The computational results indicate relatively good agreement with in-house experimental data.