External heat transfer in corridor and staggered tube bundles of different configuration under the application of low-frequency pulsations

• Published in: IOP conference series. Materials Science and Engineering 2017-09, Vol.240 (1), p.12027
• Main Authors: Ilyin, V K, Sabitov, L S, Haibullina, A I, Hayrullin, A R
• Format: Article
• Language: English
• Subjects: Computational fluid dynamics; Configurations; Cross flow; Fluid flow; Heat transfer; Heat transfer coefficients; Numerical methods; Reynolds number; Unsteady flow
• ISSN: 1757-8981; 1757-899X
• DOI: 10.1088/1757-899X/240/1/012027

In this paper, the external heat transfer coefficient for cross flow around a tube bundle by a pulsating flow was studied by numerical method. ANSYS Fluent 14.0 program is used for the mathematical modeling. The Reynolds numbers lie in the range 100 ≤ Re ≤ 1000, the Prandtl numbers 215 ≤ Pr ≤ 363, the frequency and the dimensionless relative amplitude of the pulsations were in the range 0,2 ≤ f ≤ 0,5, Hz, 15 ≤ β ≤ 35, the pulsation ratio 0,25 ≤ ψ ≤ 0,5. The external heat transfer for low-frequency pulsations was studied for 9 configurations of staggered tube bundles and 3 corridor tube bundles. Based on the modeling results, a criteria equation is obtained that allows calculating the external heat transfer in pulsating flows in tube bundles of different configurations. It is established that an increase in Re, Pr, ψ leads to a decrease in heat transfer, and an increase in f and β to an increase in heat transfer.