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Journal of Enhanced Heat Transfer
Fator do impacto: 1.406 FI de cinco anos: 1.075 SJR: 0.287 SNIP: 0.653 CiteScore™: 1.2

ISSN Imprimir: 1065-5131
ISSN On-line: 1026-5511

Volumes:
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Journal of Enhanced Heat Transfer

DOI: 10.1615/JEnhHeatTransf.2018023090
pages 431-447

HYDRODYNAMIC CHARACTERISTICS AND STRUCTURAL IMPROVEMENT OF A FIXED MOUNT IN A HEAT EXCHANGER WITH ONE-WAY FLUID–STRUCTURE INTERACTION

Lichen He
College of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing 100029, P.R. China
Weimin Yang
College of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing 100029, P.R. China
Changfeng Guan
College of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing 100029, P.R. China
Hua Yan
College of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing 100029, P.R. China

RESUMO

A rotor-assembled strand works as a typical tube insert to achieve heat transfer augmentation and scale prevention in a heat exchanger. In this paper, a fixed mount (FM), which is an essential part of the rotor-assembled strand, was simulated using the one-way fluid–structure interaction (FSI) method in order to improve its structure by analyzing its hydraulic performance and structural stress. Prior to the simulation, the accuracy of the FSI method was verified using an example of a conical tube. The results showed that the fluid deviated remarkably from the axis at the inlet of the central tube with original FM, which helps the heat transfer in the fluid; the pressure drop between the inlet and the outlet in the tube with the original FM increased by 23.89% compared with that in a plain tube; the stress at the shoulders and the joints of different parts was high; and the maximum stress point occurred at the joint of the central axis and the shoulder. To reduce the pressure drop, the structure of the original FM was improved. After modification, the pressure drop decreased, while the maximum stress magnitude was raised, and the modified FM was still safe enough when it worked under the worst conditions. The results indicate that the stress distribution and pressure drop should be considered when designing FMs.


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