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The Overall Drag Losses For A Combination of Bodies | ||
| Tikrit Journal of Engineering Sciences | ||
| Article 1, Volume 18, Issue 4, 2011, Pages 10-19 PDF (0 K) | ||
| Author | ||
| Dr. Sabah Jebour Al-Janabi | ||
| Abstract | ||
| The objective of this work is to obtain better understanding of the flow over a combination of bluff bodies in close enough proximity to strongly interact with each other. This interaction is often beneficial in that the drag of the overall system is reduced. Proto-types for this problem come from tractor- trailer and missiles, and from various add-on devices designed to reduce their drag. Thus, an experimental investigation was carried out by placing conical frontal bodies having a base diameter of 0.65 cylinder diameter with different vertex angles (30°, 50°, 70°, and 90°). It was found that, the bluffer cone with 90° vertex angle gives the best minimum drag, which is 31% lower than the drag of the isolated cylinder. Also an interesting phenomenon was observed in that, the minimum drags for all combinations are obtained at the same gap ratio (i.e.at g/d2= 0.365). | ||
| Keywords | ||
| Drag loses; bluff bodies; fluid flow | ||
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