水流実験による管群の気柱振動励振力に関する研究

概要

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Tube bundles in cross flows sometimes excite the acoustic vibration of sound fields in heat exchanger ducts. It is considered that the acoustic vibration has a feedback circuit such as self-excited or self-controlled vibration, because there is synchronization of vortex sheddings from tubes with acoustic vibration. In this case, the fluid force can cause an acoustic vibration with large amplitude when it is in phase with the acoustically oscillating fluid velocity. The authors measured the exciting forces due to a triangularly arranged tube bundle with pitch-to-diameter ratio of 2.O in a water model duct with a transverse forced oscillating flow generator, and the characteristics of oscillating lift during acoustic vibration, such as the phase difference between oscillating lift and acoustic vibration, were clarified.
一般社団法人日本機械学会の論文
1995-05-25