Research on Aerodynamics of a Novel Smart Bullet

doi:10.3969/j.issn.1000-1093.2019.04.009

Abstract

Abstract: The smart bullet is expected to remarkably enhance the combat effectiveness and survivability of individual soldiers due to its miniature size and high hit accuracy. Considering the technical requirements of device sizes and aerodynamic characteristics,an aerodynamic shape of a novel smart bullet is designed. The overall dimensions of the smart bullet are quite different from those of the normal bullet, and its aerodynamic and flow field characteristics are still unknown. Therefore, it is necessary to study the aerodynamic characteristics of the smart bullet. The aerodynamic characteristics of smart bullet are studied through numerical simulation and wind tunnel experiments, and the influence of dimensional change of bullet tail on the aerodynamic characteristics of smart bullet is analyzed. The research results show that the numerically simulated results are basically consistent with the wind tunnel experimental results, which proves the feasibility of the numerical simulation method. With the increase in the length of contraction section, the drag decreases first and then increases, while the lift and the absolute value of pitching moment remain unchanged first and then increase. With the growth of the radius of intersection, the absolute values of drag, lift and pitching moment decrease. With the increase in the radius of bottom, the drag increases first and then decreases, while the absolute values of lift and pitching moment decrease first and then increase. Key

Key words: smartbullet, aerodynamiccharacteristic, numericalsimulation, windtunnelexperiment

CLC Number:

TJ411⁺.7

ZHOU Lei, LI Zhongxin, YANG Haibo, CAI Hongming. Research on Aerodynamics of a Novel Smart Bullet[J]. Acta Armamentarii, 2019, 40(4): 744-752.

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第40卷
第4期2019 年4月兵工学报ACTA
ARMAMENTARIIVol.40No.4Apr.2019

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