D210 A STUDY ON VENTILATION CHARACTERISTICS OF CARGO-OIL PUMP ROOM(Ventilation/vortex flow measurement)

概要

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In regulation of IGC code 12.1, mechanical ventilation should be arranged to ensure sufficient air movement through the space to avoid the accumulation of flammable or toxic vapors and ensure a safe working environment, but in no case should the ventilation system have a capacity of less than 30 changes of air per hour based upon the total volume of the space. In this study, a scaled model chamber was built to investigate ventilation characteristics of the pump room in tanker and to look into stagnation area of flow field. Experimental study was performed for three kinds of Reynolds number, 1.5x10^4, 2.3x10^4 and 3.1x10^4, based on the inward velocity and height of inlet port in model by visualization equipment with laser apparatus. Instant simultaneous velocity vectors at whole field were measured by 2-D PIV system (CACTUS'2000) which software adopting two-frame grey level cross correlation algorithm The flow pattern reveals the large scale counterclockwise forced-vortex rotation from upside louver to lower scupper toward diagonal corner and also found small eddies at bottom layer.
一般社団法人日本機械学会の論文
2000-10-01