Research on Vibration and Heat Transfer Characteristics of an Optimized Structure of Elastic Tube Bundle

Abstract

Combined with the structure and operating characteristics of the original type, an optimized structure of elastic tube bundle is proposed. The mechanical properties of the end region of the elastic tube bundle are derived theoretically, and researches are carried out on the vibration and heat transfer characteristics by adopting the method of combination of experiment and numerical simulation. The results show that there exist noticeable improvements for the optimized structure in the four aspects as follows: 1. the bending moment endured in the end section is only 0.159 times of the original tube bundle; 2. the natural frequency is lower than that of the original type; 3. the mean heat transfer coefficient of which is 26% higher than that of the original one; 4. the heat transfer area per unit volume increases by 24.7%. Furthermore, a comprehensive analysis is made on heat transfer performance improvement of the optimized structure