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Numerical Heat Transfer, Part A: Applications
An International Journal of Computation and Methodology
Volume 70, 2016 - Issue 1
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Original Articles

Parametric study and multiple correlations of an H-type finned tube bank in a fully developed region

, , , &
Pages 64-78 | Received 18 Oct 2015, Accepted 24 Jan 2016, Published online: 13 Jul 2016
 

ABSTRACT

The air-side heat transfer and pressure drop characteristics of an H-type finned tube bank in the turbulent periodically fully developed region are investigated numerically. The effects of seven geometric parameters and Reynolds number are examined. It is found that when the number of tube rows is equal to and larger than 25, the heat transfer and fluid flow approach the fully developed state. Among the seven geometric parameters spanwise tube pitch has the most important effect. Based on the numerical results, the correlations of heat transfer and pressure drop of the H-type finned tube bank for the fully developed region are presented.

Nomenclature

A=

area, m2

D=

tube outside diameter, m

f=

friction factor

Fp=

fin pitch, m

Ft=

fin thickness, m

h=

heat transfer coefficient, W · m−2 · K−1

H=

fin height, m

k=

turbulent kinetic energy, m2 · s−2

Nu=

average Nusselt number

p=

pressure, Pa

P=

pumping power, W

AP=

pressure drop, Pa

Re=

Reynolds number

S1=

spanwise tube pitch, m

S2=

longitudinal tube pitch, m

T=

temperature, K

ΔT=

the log mean temperature difference, K

u=

velocity, m · s−1

W=

slit width, m

Greek alphabet=
Φ=

heat transfer rate, W

λ=

thermal conductivity, W · m−1 · K−1

ν=

kinematic viscosity, m2 · s−1

ρ=

density, kg · m−3

θ=

local intersection angle, Deg.

ε=

turbulent energy dissipation rate, m2 · s−3

Subscripts=
in=

inlet

out=

outlet

w=

tube wall

m=

module average

f=

frontal area

Nomenclature

A=

area, m2

D=

tube outside diameter, m

f=

friction factor

Fp=

fin pitch, m

Ft=

fin thickness, m

h=

heat transfer coefficient, W · m−2 · K−1

H=

fin height, m

k=

turbulent kinetic energy, m2 · s−2

Nu=

average Nusselt number

p=

pressure, Pa

P=

pumping power, W

AP=

pressure drop, Pa

Re=

Reynolds number

S1=

spanwise tube pitch, m

S2=

longitudinal tube pitch, m

T=

temperature, K

ΔT=

the log mean temperature difference, K

u=

velocity, m · s−1

W=

slit width, m

Greek alphabet=
Φ=

heat transfer rate, W

λ=

thermal conductivity, W · m−1 · K−1

ν=

kinematic viscosity, m2 · s−1

ρ=

density, kg · m−3

θ=

local intersection angle, Deg.

ε=

turbulent energy dissipation rate, m2 · s−3

Subscripts=
in=

inlet

out=

outlet

w=

tube wall

m=

module average

f=

frontal area

Acknowledgments

We gratefully acknowledge the support of this work by the National Key Basic Research Program of China (973 Program) (No. 2013CB228304).

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