International Journal of Aerospace System Engineering

The Society for Aerospace System Engineering (항공우주시스템공학회)
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Aerodynamic Design of a Novel Low-Reynolds-Number Airfoil for Near Space Propellers

  • Zhang, Shunlei (School of Aeronautics, Northwestern Polytechnical University) ;
  • Yang, Xudong (School of Aeronautics, Northwestern Polytechnical University) ;
  • Song, Bifeng (School of Aeronautics, Northwestern Polytechnical University) ;
  • Song, Wenping (School of Aeronautics, Northwestern Polytechnical University)
  • Received : 2015.06.08
  • Accepted : 2015.06.25
  • Published : 2015.06.30
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Abstract

For improving the efficiency of near space propellers working over 20km, performances of their streamwise sections, i.e. low-Reynolds-number airfoils which work at $10^4-10^5$ Reynolds numbers, are significant. Based on the low-Reynolds-number CFD technology, this paper designs a novel low-Reynolds-number airfoil. Unsteady characteristics of the laminar separation bubble on novel airfoil and a typical conventional airfoil are studied numerically, and the Reynolds number effect is investigated. Results show that at $10^4-10^5$ Reynolds numbers, unsteady aerodynamic characteristics of the novel airfoil are severely weakened and its lift-to-drag ratio can increase about 100%.

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References

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