1. Mechanical Clean Institute, Hunan Industry University, Zhuzhou 412008, China;
2. College of Highway Engineering, Changsha Science and Technology University, Changsha 410076, China
Abstract This paper researches and establishes the calculating formula of the driving force moment to make the tube-insert self-rotate and automatically remove fouling in heat transfer tubes, using the principle of momentum moment and the analyses method of kinematics. The research purpose is to offer a design theory to optimize the structure of the tube-insert with spiral flange. Based on the formula, several tube-inserts of different structure are designed and compared through experiments. The optimal insert (No. D) can be used reliably at low flowing velocity of more than 0.4 m/s. The driving force moment and heat transfer coefficient are increased by 141% and 50% respectively. The flow resistance is in the industry permission.
JIANG Shao-Qing, YU Tian-Lan, PENG De-Qi, YU Xiu-Min. Optimal design of fluid dynamic force to remove fouling inheat transfer tubes with tube-insert with spiral flange. Chinese Journal of Engineering Design, 2005, 12(3): 167-171.
