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Effects of Curved Ribs on Heat Transfer, Friction and Exergy Loss in Rectangular Cooling Channels by CFD

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Iranian Journal of Science and Technology, Transactions of Mechanical Engineering Aims and scope Submit manuscript

Abstract

In the present work, the effects of radii ratios of curved rib on heat transfer performance, friction factor, thermal performance factor and exergy loss in roughened duct are investigated. The curved ribs are formed in concave and convex shapes, with and without cut. Reynolds number values are varied in the range of 5000 to 30,000, which were most suitable for roughened duct. The radii ratios of curved rib are studied with values of (2, 3 and 4), and the effects are discussed and compared with the transverse straight rib (R00). The results show that the heat transfer enhances by using a convex broken rib at different radii ratios. The curved rib with a radius ratio of 2 offers the best heat transfer characteristics and exergy loss compared with the other cases. Convex broken rib (case D) shows the highest thermal performance factor compared with the other investigated cases. Case D shows a good improvement in heat transfer with lower pumping power consumption compared with the other investigations.

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Abbreviations

Q :

Heat transfer rate (W)

q :

Heat flux (W/m2)

\( \dot{m} \) :

Mass flow rate Kg/s

\( \dot{W} \) :

Work kW

\( \dot{E} \) :

Exergy rate kW

\( I \) :

Specific enthalpy (kJ/kg)

\( \dot{\sigma } \) :

Exergy destruction rate (irreversibility) kW

A:

Area (m2)

D:

Diameter (m)

E :

Energy kW

FR:

Friction factor ratio (−)

h:

Heat transfer coefficient (W/m2 K)

I:

Enthalpy (J/kg)

L:

Heated wall length (m)

p :

Static pressure (Pa)

R :

Radius (-)

R * :

Radii ratio (R/Dh) (-)

Re :

Reynolds number, ud/ν (-)

s:

Specific entropy kJ/kg

T:

Temperature (K)

TPF:

Thermal performance factor

u :

Velocity (m/s)

HTC:

Heat transfer coefficient

R00:

Rib 90°

\( \rho \) :

Density (kg/m3)

∆:

Difference

av:

Average

b :

Bulk temperature

h :

Hydraulic

w :

Wall temperature

References

  • Al-Qahtani M, Jang YJ, Chen HC, Han JC (2002) Prediction of flow and heat transfer in rotating two-pass rectangular channels with 45-deg rib turbulators. J Turbomach 124(2):242–250

    Article  Google Scholar 

  • ANSYS Inc. (2010) ANSYS CFX theory documentation, Version 13.1

  • Bailey JC, Bunker RS (2003) Heat transfer and friction with very high blockage 45 deg staggered turbulators. ASME Paper No. GT2003-38611

  • Bharath VR, Prashant S, Srinath VE (2017) Numerical investigation of turbulent flow and heat transfer in two-pass ribbed channels. Int J Therm Sci 112:31–43

    Article  Google Scholar 

  • Chen Y, Nikitopoulos DE, Hibbs R, Acharya S, Myrum TA (2000) Detailed mass transfer distribution in a ribbed coolant passage with a 180° bend. Int J Heat Mass Transf 43:1479–1492

    Article  Google Scholar 

  • Elwekeel FNM, Zheng Q, Abdala AMM (2014) Air/mist cooling in a rectangular duct with varying shapes of ribs. Proc IMechE Part C J Mech Eng Sci 228(11):1925–1935

    Article  Google Scholar 

  • Fu WL, Wright LM, Han JC (2005a) Heat transfer in two-pass rotating rectangular channels (AR = 1:2 and AR = 1:4) with 45° angled rib turbulators. J Heat Transf 127(3):265–277

    Article  Google Scholar 

  • Fu WL, Wright LM, Han JC (2005b) Buoyancy effects on heat transfer in five different aspect-ratio rectangular channels with smooth walls and 45 degree ribbed walls. ASME Paper No. GT 2005-68493

  • Graham A, Sewall E, Thole KA (2004) Flow field measurements in a ribbed channel relevant to internal turbine blade cooling. ASME Paper No. GT2004-53361

  • Han JC (1984) Heat transfer and friction in channels with two opposite rib roughened walls. J Heat Transf 106:774–781

    Article  Google Scholar 

  • Han JC, Park JS (1988) Developing heat transfer in rectangular channels with rib turbulators. Int J Heat Mass Transf 31(1):183–195

    Article  Google Scholar 

  • Han JC, Park JS, Lei CK (1989) Augmented heat transfer in rectangular channel of narrow aspect ratios with rib turbulators. Int J Heat Mass Transf 32(9):1619–1630

    Article  Google Scholar 

  • Han JC, Zhang YM, Lee CP (1991) Augmented heat transfer in square channels with parallel, crossed, and V-shaped angled ribs. J Heat Transf 113(3):590–596

    Article  Google Scholar 

  • Han JC, Huang JJ, Lee CP (1993) Augmented heat transfer in square channels with wedge-shaped and delta-shaped turbulence promoters. J Enhanc Heat Transf 1(1):37–52

    Article  Google Scholar 

  • Huh M, Lei J, Han JC (2011) Influence of channel orientation on heat transfer in a two-pass smooth and ribbed rectangular channel (AR = 2:1) under large rotation numbers. ASME Paper No. GT2010-22190

  • Islam MS, Haga K, Kaminaga M, Hino R, Monde M (2002) Experimental analysis of turbulent flow structure in a fully developed rib-roughened rectangular channel with PIV. Exp Fluids 33:296–306

    Article  Google Scholar 

  • Jia R, Saidi A, Sunden B (2002) Heat transfer enhancement in square ducts with V shaped ribs of various angles. ASME Paper No. GT-2002-30209

  • Kızılırmak E, Turgut O, Kızılırmak GO (2017) Three-dimensional turbulent flow, heat transfer and second-law analysis in a circular duct with single baffle. Iran J Sci Technol Trans Mech Eng 41:293–303

    Article  Google Scholar 

  • Kumar S, Amano RS (2015) Experimental investigation of heat transfer and flow using V and broken V ribs within gas turbine blade cooling passage. Heat Mass Transf 51(5):631–647

    Article  Google Scholar 

  • Lin YL, Shih TIP, Stephens MA, Chyu MK (2001) A numerical study of flow and heat transfer in a smooth and ribbed U-duct with and without rotation. J Heat Transf 123(2):219–232

    Article  Google Scholar 

  • Liou TM, Chen CC, Chen MY (2003) Rotating effect on fluid flow in two smooth ducts connected by a 180-degree bend. J Fluids Eng 125:138–148

    Article  Google Scholar 

  • Maurer M, Wolfersdorf JV, Gritsch M (2007) An experimental and numerical study of heat transfer and pressure losses of V-and W-Shaped ribs at high Reynolds numbers. 2007. ASME Paper No. GT2007-27167

  • Menni Y, Azzi A, Chamkha AJ (2017) Use of waisted triangular-shaped baffles to enhance heat transfer in a constant temperaturesurfaced rectangular channel. J Eng Sci Technol 12(12):3251–3273

    Google Scholar 

  • Menni Y, Azzi A, Chamkha AJ (2018) Optimal thermo aerodynamic performance of s-shaped baffled channels. J Mech Eng Sci 12(3):3888–3913

    Article  Google Scholar 

  • Park JS, Han JC, Huang Y, Ou S, Boyle RJ (1992) Heat transfer performance comparisons of five different rectangular channels with parallel angled ribs. Int J Heat Mass Transf 35(11):2891–2903

    Article  Google Scholar 

  • Shih TIP, Lin YL, Stephens MA (2001) Fluid flow and heat transfer in an internal coolant passage. Int J Rotat Mach 7(5):351–364

    Article  Google Scholar 

  • Su G, Teng S, Chen HC, Han JC (2003) Computation of flow and heat transfer in rotating rectangular channels (AR = 4) with V-Shaped ribs by a Reynolds stress turbulence model. 2003. ASME Paper No. GT2003-38348

  • Tanda G (2004) Heat transfer in rectangular channels with transverse and V-shape broken ribs. Int J Heat Mass Transf 47:229–243

    Article  Google Scholar 

  • Wright LM, Fu WL, Han JC (2004) Thermal performance of angled, V-shaped, and W shaped rib turbulators in rotating rectangular cooling channels (AR = 4:1). J Turbomach 126(4):604–614

    Article  Google Scholar 

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Authors and Affiliations

  1. Faculty of Industrial Education, Helwan University, Cairo, Egypt

    Fifi N. M. Elwekeel

  2. Faculty of Engineering, Helwan University, Matareya Branch, Cairo, 11718, Egypt

    Antar M. M. Abdala

  3. Harbin Engineering University, 150001, Harbin, China

    Qun Zheng

Authors
  1. Fifi N. M. Elwekeel
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  2. Antar M. M. Abdala
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  3. Qun Zheng
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Correspondence to Antar M. M. Abdala.

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Elwekeel, F.N.M., Abdala, A.M.M. & Zheng, Q. Effects of Curved Ribs on Heat Transfer, Friction and Exergy Loss in Rectangular Cooling Channels by CFD. Iran J Sci Technol Trans Mech Eng 45, 1045–1056 (2021). https://doi.org/10.1007/s40997-020-00376-3

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  • DOI: https://doi.org/10.1007/s40997-020-00376-3

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