Numerical and Experimental Investigation of the Aerodynamic Performances of Counter-Rotating Rotors
The contra-rotating axial machine is a promising solution for several applications, where high pressure and efficiencies are needed. Also, they allow reducing the speed of rotation, the radial spacing and a better flexibility of use. However, this requires a better understanding of their operation, including the influence of second rotor on the overall aerodynamic performances. This work consisted of both experimental and numerical studies to characterize this counter-rotating fan, especially the analysis of the effects of the blades stagger angle and the inter-distance between the rotors. The experimental study served to validate the computational fluid dynamics model (CFD) used in the simulations. The numerical study permitted to cover a wider range of parameter and deeper investigation on flow structures details, including the effects of blade stagger angle and inter-distance, associated with the interaction between the rotors. As a result, there is a clear improvement in aerodynamic performance compared with a conventional machine.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.3461982Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 50
 T. Shigemitsu, J. Fukutomi and Y. Okabe, "Performance and flow condition of small-sized axial fan and adoption of contra-rotating rotors" Journal of Thermal Science, 2010.
 J. Bourne, "A treatise on the screw propeller, with various suggestions of improvement" 2nd Edition, London, 1855.
 E. P. Lesley, "Experiments with a counter-propeller" National advisory committee for aeronautics, 1933.
 Toru Shigemitsu, Junichiro Fukutomi and Takuya Agawa, "Internal flow condition of high power contra-rotating small- sized axial fan" International Journal of Fluid Machinery and Systems, Vol.6, No.1:25–32, 2013.
 Toru Shigemitsu, Junichiro Fukutomi and Hiroki Shimizu,"Influence of blade row distance on performance and flow condition of contra-rotating small-sized axial fan" International Journal of Fluid Machinery and Systems, Vol.5, No.4:161–167, 2012.
 T. Shigemitsu, T. Takano, A. Furukawa, K. Okuma and S. Watanabe, "Pressure measurement on casing wall and blade rows interaction of contra-rotating axial flow pump" Journal of Thermal Science, Vol.14, 2005.