Air Flow and Stack Gas Dispersion Experiments for a DDG-47 Class Destroyer Represented by Models 5348 and 5348-1.
DAVID W TAYLOR NAVAL SHIP RESEARCH AND DEVELOPMENT CENTER BETHESDA MD SHIP PERFORMANCE DEPT
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The initial experiments showed that at the lower velocity ratios the forward pair of stacks needed to be raised. Furthermore, at 90 deg relative wind bearing the smoke from the aft pair of stacks on the starboard side blew into the antenna to port. After the experiments involving various height adjustments to the forward stacks, it was concluded that a height of 18 feet above the original setting provides proper clearance of the smoke. A faired eductor casing was designed and built for this stack height. The second phase of experiments showed that this new stack was adequate. The experiments to determine the effect of rounding the forward profile of the bridge showed no significant improvement. No change to the existing bridge configuration is recommended.
- Marine Engineering