給湯配管中の水撃現象防止に関する基礎的研究 : 拡大管による影響

概要

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When the valve in water supply pipes is closed suddenly, the flow stops and the momentum changes with the inertia of water flow. We call it as "Water hammering". A fundamental study of water hammer softening in household water supply pipes is carried out experimentally and theoretically. Three kinds of enlargement tubes of 80,120,160 mm in inner diameter with the same length of Φ200 mm and four kinds of the enlargement tubes of 120 mm inner diameter with five kinds of length of 3,5,10,50,200 mm were tested in order to reduce the pressure rise and the slope of the pressure rise. As a result, it was found that as the diameter of the enlarged part became greater, the reduction of the pressure rise became greater and the slope of the pressure rise became greater.
一般社団法人日本機械学会の論文
1998-11-25