REPUBLIC OF SERBIA

MINISTRY OF DEFENCE

www.mod.gov.rs

MINISTRY OF DEFENCE

Material Resources Sector

Defensive Technologies Department

Military Technical Institute

www.vti.mod.gov.rs

ENHANCEMENT OF AERODYNAMIC FAST PREDICTION METHODS FOR SLOTTED ROCKETS/MISSILES

BORA ATAK

ROKETSAN Missile Industries Inc., Ankara-Türkiye,  batak@roketsan.com.tr

Alİ AKGÜL

ROKETSAN Missile Industries Inc., Ankara-Türkiye,  aakgul@roketsan.com.tr

HAYRİ ACAR

İstanbul Technical University, İstanbul-Türkiye, acarh@itu.edu.tr

Abstract: In this article, aerodynamic fast prediction tools which are developed for conventional rockets/missiles are improved to be used for non-conventional slotted rockets/missiles. A method that uses Computational Fluid Dynamic with component build-up and equivalent angle of attack methods together (CFD-CBU) is developed. A generic anti-tank missile is formed for the development and the validation of this method. The individual databases are generated for the missile airframe components by using CFD analyses in different flight conditions. On the other hand, the lifting surface-body interference factors and equivalent angle of attacks of these components are calculated by using component build-up and equivalent angle of attack methods. The individual databases, interference factors and equivalent angle of attacks are used together to estimate the aerodynamic performance of full configurations. CFD-CBU results are compared with one of the common fast prediction tools Missile DATCOM and computational fluid dynamic analyses of full-configurations. According to the results CFD-CBU method is in a much better agreement with full configuration CFD analyses than Missile DATCOM. The method that is developed in this research project can be used as an aerodynamic design and analyses tool for folded fin (slotted) missile/rockets.

Key words: slotted rockets/missile, computational fluid dynamics (CFD), component build-up method (CBU), CFD-CBU.