Multi-objective Optimization on Aerodynamic Shape of Projectile with Twisted Empennages

doi:10.3969/j.issn.1000-1093.2016.07.005

Abstract

Abstract: The twisted empennage structure is applied to the aerodynamic configuration design of hedgehopping terminal sensitive projectile for improving its performance. In order to obtain higher balance rotational speed and lower drag coefficient, a multi-objective optimization design of the aerodynamic shape of projectile with twisted empennages is developed based on the wind tunnel tests. The computational fluid dynamics, orthogonal experiment design, stepwise regression analysis and genetic algorithm are applied, and the Pareto solutions of the empennage shape are provided. The results indicate that the twisted empennage structure can significantly improve the aerodynamic performance of projectile. An aerodynamic parameter surrogate model is established accurately to predict the projectile drag coefficient and balance rotational speed, and the influences of empennage structural parameters on the proposed model can be further obtained. The Pareto solutions based on the multi-objective genetic algorithm display a good performance on the increase in rotational speed and the reduction in drag.

Key words: ordnance science and technology, twist empennage, numerical simulation, stepwise regression analysis, genetic algorithm, multi-objective optimization

CLC Number:

TJ414⁺.5

CHEN Liang， LIU Rong-zhong， GUO Rui， ZHAO Bo-bo， LIU Lei， YANG Yong-liang. Multi-objective Optimization on Aerodynamic Shape of Projectile with Twisted Empennages[J]. Acta Armamentarii, 2016, 37(7): 1187-1193.

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