Staff Members - Benha University
Developing Heat Transfer Augmentation in Ribbed Rectangular Duct with Different Intake Shapes
Journal of Al Azhar University Engineering Sector (JAUES), Cairo, Egypt. • 2005
Publication Information
Authors
Mohamed Fayek Abd Rabbo, Khalid Ibrahem, Aly Abdelaziz, Karam ELshazly
Keywords
heat transfer; ribbed rectangular duct; intakes Entrance region, Intake shape, Ribbed duct, Fluid flow, Flow visualization, CFD Code
Journal
Journal of Al Azhar University Engineering Sector (JAUES), Cairo, Egypt.
Publisher
Not Available
Volume
Al-Azhar University Engineering Journal, Vol.9, No.2, April 2006, 348-365.
Issue
No.2, April 2006
Pages
348-365
publication.type
International
Paper Link
Not Available
Supplementary Materials
Not Available
Abstract
The present study is concerned with the flow and heat transfer for turbulent flow in the developing region for
ribbed duct The study is based on both experimental and numerical simulations of intercooling passages of
blade turbine with three different intake shapes. The effects of the different investigated parameters (Reynolds
number, rib pitch, and intake shape) on the friction factor, local temperature, and local heat transfer
coefficient are studied. A commercial ANSYS code [1] based on a finite element technique is used to support
the experimental results. The experiments are carried out by using a wind tunnel with a suction blower and a
roughened rectangular duct. It was found that the Nusselt number ratio was larger for abrupt and plenum box
compared with that for bellmouth near the contraction inlet. This is due to the effect of the high turbulence at
the sudden contraction inlet. The effect of intake shape on heat transfer coefficient for ribbed duct was
significant for the case of rib pitch to height ratio of 20 more than that in the case of 10. Correlations were
obtained for the average Nusselt number ratio in the developing region of the test duct for different intake
shapes.
ribbed duct The study is based on both experimental and numerical simulations of intercooling passages of
blade turbine with three different intake shapes. The effects of the different investigated parameters (Reynolds
number, rib pitch, and intake shape) on the friction factor, local temperature, and local heat transfer
coefficient are studied. A commercial ANSYS code [1] based on a finite element technique is used to support
the experimental results. The experiments are carried out by using a wind tunnel with a suction blower and a
roughened rectangular duct. It was found that the Nusselt number ratio was larger for abrupt and plenum box
compared with that for bellmouth near the contraction inlet. This is due to the effect of the high turbulence at
the sudden contraction inlet. The effect of intake shape on heat transfer coefficient for ribbed duct was
significant for the case of rib pitch to height ratio of 20 more than that in the case of 10. Correlations were
obtained for the average Nusselt number ratio in the developing region of the test duct for different intake
shapes.