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- Title
The effect of flow-induced vibrations on the performance of heat exchangers.
- Authors
Ali, Muhammad Zeeshan; Umer, Muhammad; Khan, Talha Irfan; Anwar, Muhammad; Qazi, Usama Waleed
- Abstract
The current study investigates the enhancement of the heat transfer rate of a fin tube radiator through the structural vibration without compromising its structural integrity. A fin tube radiator with fan is fixed on an electrodynamic shaker, and tests are performed at various frequencies under vertical and horizontal vibrations. These tests entail the variations in various parameters at different air flow velocities. A detailed study is presented to compare the effect of the different vibrational mode of the structure on the enhancement of the heat transfer rate. In this regard, the mode shapes are determined via simulation and experimentation. It has been observed that the second mode of vibration corresponds to the maximum total deformation in the radiator structure for a given excitation. Thus, water and air flow becomes more turbulent, resulting in the maximum temperature difference between inlet and outlet. The extensive experimentation indicates that the air-side pressure drop by vertical and horizontal forced vibration increased by 24.96% and 18.91%, respectively. Maximum overall heat transfer coefficient of the radiator increased by 49.78% and 47.39% by vertical and horizontal vibrations, respectively. The vibration disturbance enhanced the effectiveness of the radiator by 25.7% and 23.72% as a result of vertical and horizontal vibrations, respectively. Hence, a comparison between vertical and horizontal vibrations is made. In conclusion, it is noted that convective heat transfer of the radiator is enhanced by increasing frequency, vibration amplitude and wind speed. However, the effectiveness of the system is decreased as a result of increasing wind speed.
- Subjects
HEAT exchangers; AIR flow; HEAT convection; HEAT transfer coefficient; STRUCTURAL dynamics; PRESSURE drop (Fluid dynamics); MODE shapes; WIND speed
- Publication
Journal of Thermal Analysis & Calorimetry, 2023, Vol 148, Issue 6, p2615
- ISSN
1388-6150
- Publication type
Article
- DOI
10.1007/s10973-022-11923-2