開かい管かんかいかんMeanings1nounopen pipe; open tubeTechnical term used in physics and engineering for a pipe or tube that is open at one or both ends, especially in the context of acoustics or fluid dynamics.開かい管かんの共きょう鳴めい周しゅう波は数すうを計けい算さんする。Calculate the resonant frequency of an open pipe.