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Experimental and Numerical Investigations on Thermal-Hydraulic Performance of Three-Dimensional Overall Jagged Internal Finned Tubes.
Huang, Shufeng; Deng, Mingjiang; Chen, Zhixin; Yang, Dayong; Xu, Yingshuai; Lan, Ning.
Afiliación
  • Huang S; School of Mechanical and Electronic Engineering, East China University of Technology, Nanchang 330013, China.
  • Deng M; School of Mechanical and Electronic Engineering, East China University of Technology, Nanchang 330013, China.
  • Chen Z; School of Mechanical and Electronic Engineering, East China University of Technology, Nanchang 330013, China.
  • Yang D; School of Mechanical and Automotive Engineering, Guangxi University of Science and Technology, Liuzhou 545006, China.
  • Xu Y; School of Mechanical and Electronic Engineering, East China University of Technology, Nanchang 330013, China.
  • Lan N; School of Mechanical and Electronic Engineering, East China University of Technology, Nanchang 330013, China.
Micromachines (Basel) ; 15(4)2024 Apr 11.
Article en En | MEDLINE | ID: mdl-38675324
ABSTRACT
To satisfy the demand for efficient heat transfer, a novel three-dimensional overall jagged internal finned tube (3D-OJIFT) was fabricated, using the rolling-ploughing/extruding method. The thermal performance of the 3D-OJIFT were studied and compared in experiments and three-dimensional numerical simulations. The RNG k-ε turbulence model is well verified with the experimental results. By analyzing the distributions of velocity, temperature, and turbulence kinetic energy, it was found that the 3D-OJIFT destroyed the development of the velocity and thermal boundary layers, increased the turbulence disturbance, and reduced the temperature gradient, thus improving the heat transfer. The influences of the jagged height and jagged spiral angle of the 3D-OJIFT are discussed. The Nu and f increased as the jagged height of the 3D-OJIFT increased. The Nusselt number of the 3D-OJIFT was 1.67-2.04 times the value for the smooth tube. In addition, the comprehensive heat transfer performance of the 3D-OJIFT improved after increasing the jagged spiral angle. Compared with conventional internal helical-finned tubes and other reinforcement structures reported in the literature, the 3D-OJIFT demonstrated better comprehensive heat transfer performance. Finally, empirical correlations of the 3D-OJIFT were obtained.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Micromachines (Basel) Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Suiza
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Micromachines (Basel) Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Suiza