Session: FSI-02-03 Flow-induced Vibration III

Paper Number: 61657

Start Time: Wednesday, July 14, 2021, 08:00 PM

61657 - Numerical Studies on Modal Analysis of Curved Tube and Coil Tube in Coil-Wound Heat Exchanger 

Helical wound heat exchanger, which has a large-scale turbulence in the shell side and a great heat transfer coefficient, has been diffusely used in chemical industry, such as liquefied natural gas (LNG) and crude pyrolysis of ethylbenzene. In order to meet the requirements working conditions, the helical tube is fixed with the two kinds of supports that are common support and special support respectively. Through the numerical simulation of contact analysis and modal analysis, the restraint methods of the two supports on helical tubes are simplified to facilitate further research. In addition, the influence of parameters in the helical tube on natural frequency was studied. In this work, the natural frequency of the helical tube was reduced by increasing helix radius. The natural frequency of the helical tube, however, was enlarged by increasing helix angle. The natural frequency of the inner helical tube was greater than that of the outer helical tube. Most importantly, the 3D cured tube played a leading role in the natural frequency of helical tube. The constraints can be added to the 3D curved tube to increase the natural frequency of helical tube. It provides some reference for the arrangement of the support of helical wound heat exchanger.

Presenting Author: Yue Wang Tianjin University

Authors:

Yue Wang Tianjin University
Peng Ren Tianjin University
Guorui Zhu Tianjin University
Wei Tan Tianjin University