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Abstract

This paper deals with the application of a three-dimensional Navier-Stokes solver for the prediction of steady viscous compressible flow and heat transfer in a square channel with one rib-roughened wall. The computation results are compared with detailed experiments carried out at the von Karman Institute.

The two-dimensional computations agree rather well with the experiments for the prediction of the aerodynamics, even if the recirculation length is overestimated. In this case, a k-l turbulence model seems to be sufficient. However, heat transfer between the ribs is poorly matched except when a thermal ASM (algebraic stress model) turbulence model (GGDH, or generalized gradient diffusion hypothesis), which computes the u_iθ (velocity-temperature) correlations by algebraic equations, is used.

The three-dimensional computations capture the correct position of the reattachment point with the k-l turbulence model. It is nevertheless necessary to use the ASM turbulence model to find vortices turning the correct way in the cross-sections. These are indeed secondary flows of the second kind which are mainly due to turbulence anisotropy when the ribs are inclined at 90° to the flow direction.

Keywords

aerodynamics heat transfer channel flow ribs experiments numerical modelling

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References

Han

J. C.

Heat transfer and friction on channels with two opposite rib-roughened walls

J. Heat Transfer, 1984, 106, 774–781.

Taslim

M. E.

Wadsworth

C. M.

An experimental investigation of the rib surface-averaged heat transfer coefficient in a rib-roughened square passage. ASME paper 94-GT-162, 1994.

Wang

Ireland

P. T.

Kohler

S. T.

Chew

J. W.

Heat transfer measurements to a gas turbine cooling passage with inclined ribs. ASME paper 96-GT-542, 1996.

Akino

Ichimiya

Mitsushiro

Ueda

Improved liquid crystal thermometry excluding human color sensation

Int. J. Heat Transfer, 1989, 111(2), 558–565.

Arts

Lambert

Rau

Acton

Aero-thermal investigation of the flow developing in a 180 degree turn channel. In International Symposium on Heat Transfer in Turbomachinery, Athens, Greece, 1992.

Rau

Cakan

Moeller

Arts

The effect of periodic ribs on the local aerodynamic and heat transfer performance of a straight cooling channel. ASME paper 96-GT-541, 1996.

Rau

The blockage effect of turbulators in a rectilinear cooling channel. VKI Lecture Series on Heat Transfer and Cooling in Gas Turbines, VKI LS 1995–05, 1995.

Benocci

Modelling of turbulent heat transfer transport, a state of the art. VKI Technical Memorandum 47, 1991.

Brundrett

Baines

W. D.

The production and diffusion of vorticity in duct flow. J. Fluid Mechanics, 1964, 19, 375–394.

10.

Demuren

A. O.

Rodi

Calculation of turbulence-driven secondary motion in non-circular ducts. J. Fluid Mechanics, 1984, 140, 189–222.

11.

Fuijta

Yokosawa

Hirota

Secondary Flow of Second Kind in Rectangular Ducts with One Rough Wall—Experimental, Thermal and Fluid Science, 1989, Vol. 2, pp. 72–80 (Elsevier).

12.

Launder

B. E.

On the computation of convective heat transfer in complex turbulent flows. J. Heat Transfer, 1988, 110, 1112–1128.

13.

Liou

T. M.

Hwang

J. J.

Chen

S. H.

Simulation and measurement of enhanced turbulent heat transfer in a channel with periodic ribs on one principal wall. Int. J. Heat Mass Transfer, 1993, 36 (2), 507–517.

14.

Melling

Withelaw

J. H.

Turbulent flow in a rectangular duct. J. Fluid Mechanics, 1976, 78 (2), 289–315.

15.

Smith

Reynolds

W. C.

On the Yakhot-Orszag renormalization group method for deriving turbulence statistics and models. Phys. Fluids A, 1992, 4 (2).

16.

Speziale

C. G.

Thangam

Analysis of an RNG based turbulence model for separated flows. NASA CR-1B9600, ICASE report 92–3, 1992.

17.

Yakhot

Orszag

S. A.

Renormalization group analysis of turbulence. J. Sci. Comput, 1986, 1, 3.

18.

Yakhot

Orszag

S. A.

Speziale

C. G.

Thangam

Gatski

T. B.

Development of turbulence models for shear flows by a double expansion technique. Phys. Fluids A, 1992, 4 (7).

19.

Yakhot

Smith

The renormalization group, the ε-expansion and derivation of turbulence models. J. Sci. Comput., 1992, 7, 1.

Experimental and numerical investigation on flow and heat transfer in large-scale,turbine cooling,representative,rib-roughened channels

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