年間 8 号発行
ISSN 印刷: 1065-5131
ISSN オンライン: 1563-5074
Indexed in
HYDRODYNAMIC CHARACTERISTICS AND STRUCTURAL IMPROVEMENT OF A FIXED MOUNT IN A HEAT EXCHANGER WITH ONE-WAY FLUID–STRUCTURE INTERACTION
要約
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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Saha Sujoy Kumar, Ranjan Hrishiraj, Emani Madhu Sruthi, Bharti Anand Kumar, Fouling on Various Types of Enhanced Heat Transfer Surfaces, in Introduction to Enhanced Heat Transfer, 2020. Crossref