Abstract
A new method of heat transfer enhancement by water crossflowβinduced vibration is presented. A heat transfer element which involves elastic tube bundles has been designed. This system has excellent response characteristics of vibration to the crossflow. A triangular pole device for producing pulsating flow was adopted. This device can induce vibration in a fixed range of frequencies and has a profound influence on heat transfer augmentation. For the constant heat flux boundary condition, experiments are carried out on the heat transfer characteristics of elastic tube bundles augmented by flowβinduced vibration in a water crossflow. Compared with static tube bundles, the outβtube average convective heat transfer coefficients of the elastic tube bundles are increased by 100β150% under the condition of crossflowβinduced vibration. Dimensionless equations describing the outside heat transfer coefficient for the elastic tube bundles were acquired. Β© 2004 Wiley Periodicals, Inc. Heat Trans Asian Res, 33(4): 211β218, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/htj.20012