Journal of Basic and Applied Research International
 

Journal of Basic and Applied Research International, ISSN No. : 2395-3438 (Print), 2395-3446 (Online), Vol.: 23, Issue.: 1

Original Research Article

ON THE MODELING OF PERFORMANCE OF HEAT EXCHANGER TUBE FITTED WITH SWIRL INSERTS

 

ALAA MAHFOUZ1, WALEED ABDELMAKSOUD2, AHMED MEDHAT3 AND ESSAM E. KHALIL2*

1Department of Mechanical Power Engineering, Beni-Suef University, Egypt.

2Department of Mechanical Power Engineering, Cairo University, Egypt.

3Department of Mechanical Power Engineering, Housing and Building National Research Center, Egypt.

Abstracts

The present paper validated the experimental results of turbulent flow in a plain tube with the numerical results that performed in this paper using standard k-ε, RNG k-ε, Realizable k-ε, and SST k-ω turbulence model. The validation shows that an excellent agreement between the numerical results using SST k-ω turbulence model and the experimental results. The effect of the twisted tape with rod (TTR) on the heat transfer rate, friction factor, and the performance evaluation criteria (PEC) are numerically investigated and are compared with those obtained numerically by a heat exchanger plain tube and tube fitted with the typical twisted tapes (TT). ANSYS Fluent16 is the computational fluid dynamic (CFD) software used in this paper. 

The comparisons reveal to that, the Nusselt number values of the tube fitted with TTR are more than those obtained by the plain tube, and they increase as the twisted tape ratio decrease. The thermal performance factor of the tube fitted with TTR of twisted ratio=1.75 reach to 1.29 at Re=2000 that is more than that of the TT by 16%, where the friction factor obtained by TTR is less than that obtained by tube fitted with TT.

Keywords :

Numerical simulation; heat transfer augmentation; performance evaluation criteria; twisted tape; twisted tape with rod.