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Science and Technology of Energetic Materials

Vol.67, No.1 (2006)Special Issue for ISEM 2005

Letter

Air resistance of spherical fireworks shells
Y. Ooki, D. Ding, M. Higaki, Y. Nemoto, and T. Yoshida
p.39-42

Abstract

Free falling and wind tunnel experiments of model spherical fireworks shells have been carried out, in order to examine the effect of air resistance to the exterior ballistics of the shells. It was found that at the initial stage of free falling the air resistance is negligible and the result of ballistic calculation is practically not affected by using different drag coefficients. The drag coefficients of empty shells were estimated by free falling and wind tunnel experiments at a Re region.

Keywords

Fireworks, Model shell, Free falling, Wind tunnel, Air resistance

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