International Journal of Aeronautical and Space Sciences

The Korean Society for Aeronautical and Space Sciences (한국항공우주학회)
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Simulation of Conceptual Designs of a Three-Surface Stealth Strike Fighter

  • Kuizhi, Yue (Department of Airborne Vehicle Engineering, Naval Aeronautical and Astronautical University, School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics) ;
  • ShiChun, Chen (School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics) ;
  • Wenlin, Liu (Department of Airborne Vehicle Engineering, Naval Aeronautical and Astronautical University) ;
  • Dazhao, Yu (Department of Airborne Vehicle Engineering, Naval Aeronautical and Astronautical University)
  • Received : 2014.07.08
  • Accepted : 2014.11.07
  • Published : 2014.12.30
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Abstract

A conceptual design of a three-surface strike fighter was studied and stealth performance was taken into account to enhance survivability and battle effectiveness. CATIA was used to design the aircraft's three-dimensional prototype model and the weapon carriage arrangement was also studied. The aircraft's RCS characteristics and distributions under X, S, C, and L bands were simulated using the RCSPlus software, which is based on the PO method. Pressure and velocity distributions of the flow field were also simulated using CFD. A turbulence model was based on standard $k-{\varepsilon}$ function and N-S functions were used during the CFD computation. Lift coefficients, drag coefficients, and lift-to-drag ratio were obtained by aerodynamic simulation. The results showed that: (1) the average value of head-on RCS between ${\pm}30^{\circ}$ is below -3.197 dBsm, and (2) the lift coefficient is 0.34674, the drag coefficient is 0.04275, and the lift-to-drag ratio is 8.11087 when the attack angle is $2.5^{\circ}$.

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