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Analysis of Ballast Water Sampling Port Designs Using Computational Fluid Dynamics.
| 题名： | Analysis of Ballast Water Sampling Port Designs Using Computational Fluid Dynamics. |
| 作者： | richard, r. v. grant, j. f. lemieux, e. j. |
| 关键词： | computational fluid dynamics, flow fields, sampling, naval research, ports(openings), piping systems, ballast, particle trajectories |
| 摘要： | Analytical methods and computational fluid dynamics are used to describe flow conditions encountered at Naval Research Laboratory's Ballast Water Treatment Test Facility. Design tradeoffs are examined in the engineering of sample ports for collecting biological organisms in water samples, and criteria are provided for sample port installation in shipboard piping systems. Results of this work show that the ideal geometry for biological sampling is from the centerline of a straight, vertical, upward-flowing pipe having a sample port diameter between 1.5 and 2.0 times the basic isokinetic diameter as defined in this report. Sample ports should use ball valves for isolation purposes, and diaphragm or venturi valves for flow control; they should be located as close to the overboard outlet as possible; and they should be positioned as far from upstream obstructions and fittings as possible. / NOTE: Final rept. / Supplementary Notes: The original document contains color images. / Availability Note: Order this product from NTIS by: phone at 1-800-553-NTIS (U.S. customers); (703)605-6000 (other countries); fax at (703)605-6900; and email at orders@ntis.gov. NTIS is located at 5285 Port Royal Road, Springfield, VA, 22161, USA. |
| 总页数： | u0816；62p |
| 报告类型： | 科技报告 |
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