The effect of geometry changes on aerodynamic coefficients of a canard control air-to-air missile

Document Type : Original Article

Authors

1 Master's degree, Shahid Sattari Aeronautical University of Science and Technology. Tehran, Iran

2 Assistant Professor,Shahid Sattari Aeronautical University of Science and Technology. Tehran, Iran

3 Assistant Professor, Shahid Sattari Aeronautical University of Science and Technology. Tehran, Iran

Abstract

In this article, the effect of changes in the wing and canard geometry and body length on the aerodynamic coefficients of the Sidewinder missile has been investigated using MD and Ansys CFX software. First, using the MD code, the aerodynamic coefficients of five different shapes of this missile have been investigated in different flight conditions. To verify the MD data, the data obtained from a model of this missile was examined with existing wind tunnel data. The results showed that in all flight conditions, the change of aerodynamic coefficients is the same, and at the low attack angles, the data has very good agreement with the experimental data, and also, the new series of the missile have a better range and maneuverability than its initial series. Next, using the MD code results, the flow around the existing missile (AIM-9L) and the new missile (AIM-9X) has been simulated using CFX software. At this point, investigations were carried out using an unstructured mesh and K- ω SST turbulence model. To verify the numerical method, one model of this missile was examined and by comparing it with the available data, a maximum error of 4% was observed for the numerical method. The results showed that the applied geometrical changes had increased the lift to drag ratio of the new missile compared to the existing missile, and its stability has also decreased, and the range of the new missile has also increased by about 43%.

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Fluid Mechanics & Aerodynamics
Volume 14, Issue 1 - Serial Number 35
Spring and summer 2025
September 2025

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History

  • Receive Date: 17 April 2025
  • Revise Date: 24 July 2025
  • Accept Date: 20 August 2025
  • Publish Date: 01 September 2025

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