箔片型红外面源诱饵扩散规律

doi:10.7527/S1000-6893.2016.0023

Abstract

Abstract:

The surface-type infrared decoy has become an important method against infrared imaging guided missile. In this paper, foil-surface-type infrared decoy is regarded as the research object and the computational fluid dynamics (CFD) is used to obtain the aerodynamic coefficients of a single foil and two parallel foils at different angles of attack. With the analysis of foil movement in the air, the movement of the foil is divided into two phases, i.e., the light-off and complete combustion considering the particularity of combustion pressure. And the motion models of the two stages are established. Based on the motion model of the single foil, thousands of foils' initial probability distribution of posture and rotating angular velocity are set and then the motion equations of thousands of foils are solved at the same time. In this way, the whole space motion diffusion rule of foil-surface-type infrared decoy is obtained. The simulation results show that the diffusion shape of surface-type infrared decoy, which is launched vertically from high-speed motion platform, is the taper cloud with sparse front and dense rear approximately. The diffusion size and motion position of simulation are highly identical with the measured value, and the error is less than 5% of the diffusion size in x direction in particular.

Key words: foil, surface-type infrared decoy, computational fluid dynamics, aerodynamic coefficients, combustion force, diffusion rule

CLC Number:

V211.3
TN972

ZOU Tao, WANG Chaozhe, TONG Zhongxiang, JIA Lintong, TONG Qi. Diffusion rule of foil-surface-type infrared decoy[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2016, 37(9): 2634-2645.

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Diffusion rule of foil-surface-type infrared decoy

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