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Heat transfer enhancement in square ducts with V-shaped ribs of various angles

Jia, Rongguang LU ; Saidi, Arash and Sundén, Bengt LU (2002) ASME TURBO EXPO 2002: Heat Transfer, Manufacturing Materials and Metallurgy, 2002 In American Society of Mechanical Engineers, International Gas Turbine Institute, Turbo Expo (Publication) IGTI 3 A. p.469-476
Abstract
Experimental studies have revealed that both downstream and upstream pointing V-shaped ribs result in better heat transfer enhancement than transverse straight ribs of the same geometry. Secondary flows induced by the angled ribs are believed to be responsible for this higher heat transfer enhancement. Further investigations are needed to understand this. In the present study, the heat and fluid flow in V-shaped-ribbed ducts is numerically simulated by a multi-block 3D solver, which is based on solving the Navier-Stokes and energy equations in conjunction with a low-Reynolds number k-ε turbulence model. The Reynolds turbulent stresses are computed with an explicit algebraic stress model (EASM), while turbulent heat fluxes are calculated... (More)
Experimental studies have revealed that both downstream and upstream pointing V-shaped ribs result in better heat transfer enhancement than transverse straight ribs of the same geometry. Secondary flows induced by the angled ribs are believed to be responsible for this higher heat transfer enhancement. Further investigations are needed to understand this. In the present study, the heat and fluid flow in V-shaped-ribbed ducts is numerically simulated by a multi-block 3D solver, which is based on solving the Navier-Stokes and energy equations in conjunction with a low-Reynolds number k-ε turbulence model. The Reynolds turbulent stresses are computed with an explicit algebraic stress model (EASM), while turbulent heat fluxes are calculated with a simple eddy diffusivity model (SED). Firstly, the simulation results of transverse straight ribs are validated against the experimental data, for both velocity and heat transfer coefficients. Then, the results of different rib angles (45° and 90°) and Reynolds number (15,000 - 30,000) are compared to determine the goodness of different rib orientations. Detailed velocity and thermal field results have been used to explain the effects of the inclined ribs and the mechanisms of heat transfer enhancement. (Less)
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author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
Explicit algebraic stress model, Simple eddy diffusivity model, Heat transfer enhancement, Square ducts, Secondary flows
in
American Society of Mechanical Engineers, International Gas Turbine Institute, Turbo Expo (Publication) IGTI
volume
3 A
pages
469 - 476
publisher
American Society Of Mechanical Engineers (ASME)
conference name
ASME TURBO EXPO 2002: Heat Transfer, Manufacturing Materials and Metallurgy, 2002
external identifiers
  • Other:CODEN: AMGIE8
  • Scopus:0037002932
language
English
LU publication?
yes
id
f3dad41d-ce9e-4c21-8f9d-aa153f29b3f3 (old id 611815)
date added to LUP
2007-11-27 15:40:10
date last changed
2016-10-13 04:48:54
@misc{f3dad41d-ce9e-4c21-8f9d-aa153f29b3f3,
  abstract     = {Experimental studies have revealed that both downstream and upstream pointing V-shaped ribs result in better heat transfer enhancement than transverse straight ribs of the same geometry. Secondary flows induced by the angled ribs are believed to be responsible for this higher heat transfer enhancement. Further investigations are needed to understand this. In the present study, the heat and fluid flow in V-shaped-ribbed ducts is numerically simulated by a multi-block 3D solver, which is based on solving the Navier-Stokes and energy equations in conjunction with a low-Reynolds number k-ε turbulence model. The Reynolds turbulent stresses are computed with an explicit algebraic stress model (EASM), while turbulent heat fluxes are calculated with a simple eddy diffusivity model (SED). Firstly, the simulation results of transverse straight ribs are validated against the experimental data, for both velocity and heat transfer coefficients. Then, the results of different rib angles (45° and 90°) and Reynolds number (15,000 - 30,000) are compared to determine the goodness of different rib orientations. Detailed velocity and thermal field results have been used to explain the effects of the inclined ribs and the mechanisms of heat transfer enhancement.},
  author       = {Jia, Rongguang and Saidi, Arash and Sundén, Bengt},
  keyword      = {Explicit algebraic stress model,Simple eddy diffusivity model,Heat transfer enhancement,Square ducts,Secondary flows},
  language     = {eng},
  pages        = {469--476},
  publisher    = {ARRAY(0xa053b28)},
  series       = {American Society of Mechanical Engineers, International Gas Turbine Institute, Turbo Expo (Publication) IGTI},
  title        = {Heat transfer enhancement in square ducts with V-shaped ribs of various angles},
  volume       = {3 A},
  year         = {2002},
}