Abstract
The tube banks are set up in the duct of heat exchangers such as boilers etc. When the frequency of Karman vortex behind the tube banks is close to the natural frequency of the duct, the self-sustained tone is generated. Generally, the method of inserting the baffle plate in tube banks is adopted as counter measures of self-sustained tone. However, when there is a space called cavity between tube banks, the method of inserting the baffle plate has not been established. Then, to examine the generation mechanism and the countermeasure of the self-sustained tone for tube banks with cavity, the experiment and the analysis were carried out in this study.
