Abstract
The tube banks are set up in the duct of heat exchanger such as boilers etc. When the frequency of Karman vortex behind the tube banks is close to the natural frequency of duct, the self sustained tone is generated. Generally, the method of inserting the baffle plate in tube banks is adopted as self sustained tone measures. However, when there is a space between tube banks, the method of inserting the baffle plate is indefinite. 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.
