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이선곤 ( Sun Kon Lee ),강세호 ( Sae Ho Kaong ),양철수 ( Cheol Soo Yang ),우창기 ( Chang Ki Woo ) 한국안전학회(구 한국산업안전학회) 2014 한국안전학회지 Vol.29 No.5
When the fluid energy convert into kinetic energy due to water hammer, the propagation velocity of pressure wave appear. The propagation velocity of pressure wave(1050 m/s) of very fast could be damage to the pipeline system. If the occurrence of water hammer is due to down-pressure, the faster the air exhaust or supply device is needed. it is high Speed Air Valve. In this paper, Each3.12, 3.13, 3.72, 3.74 kg/㎠ pipeline pressure were setting, and then executed pressure rapid drop for obtaining a high Speed Air Valve Operating time and pressure change data. the result was that pipe line pressure stabilization time were each 0.98, 1, 1.22, 1.25 sec. In other words, that pressure drop experimental results pipe line pressure was equal to atmospheric pressure without negative pressure After about one second. The study result would be useful to pipe line system stability design because this data could be foresee pressure stabilization time.