Experimental and Theoretical Investigations on Heat Transfer of Strongly Heated Turbulent Gas Flow in an Annular Duct

Fujii, Sadao; Akino, Norio; Hishida, Makoto; Kawamura, Hiroshi; Sanokawa, Konomo

doi:10.1299/jsmeb1988.34.3_348

Cited by 8 publications

(8 citation statements)

References 7 publications

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“…By adding correction terms and adjusting model constants, it appears that he was able to obtain results that one might consider adequate for engineering analyses. Fujii et al [14] also conducted experimental and numerical investigations using two-equation eddy viscosity models for heat transfer of a strongly heated gas flow in an annular duct. At low heat fluxes, all models tested performed satisfactorily.…”

Section: Nomenclaturementioning

confidence: 99%

AN ASSESSMENT OFk–ω ANDv²–fTURBULENCE MODELS FOR STRONGLY HEATED INTERNAL GAS FLOWS

Spall¹,

Richards²,

McEligot

2004

Numerical Heat Transfer, Part A: Applications

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Both k-v and v 2 -f turbulence models are used to model an axisymmetric, strongly heated, low-Mach-number gas flowing upward within a vertical tube in which forced convection is dominant. The heating rates are sufficiently high, so that fluid properties vary significantly in both the axial and radial directions; consequently, fully developed mean flow profiles do not evolve. Comparisons between computational results and experimental results, which exist in the literature, reveal that the v 2 -f model performs quite well in predicting axial wall temperatures, and mean velocity and temperature profiles. This may be contrasted with the k-v model results, in which the wall heat transfer rates and near-wall velocities are significantly overpredicted.

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Section: Nomenclaturementioning

confidence: 99%

AN ASSESSMENT OFk–ω ANDv²–fTURBULENCE MODELS FOR STRONGLY HEATED INTERNAL GAS FLOWS

Spall¹,

Richards²,

McEligot

2004

Numerical Heat Transfer, Part A: Applications

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“…Heated length between the electrodes was about 32 diameters and it was preceded by a 50 diameter, adiabatic entry region for ow development. Criteria for ow regime prediction [26] and experimental conditions are presented in Figure 6. Runs 618, 635 and 445 are corresponding to inlet Reynolds numbers of about 6080, 6050 and 4260 with non-dimensional heating rates, q + = q w =(G c p i ), of about 0.0018, 0.0035 and 0.0045, respectively.…”

Section: Wall Boundary Conditionsmentioning

confidence: 99%

URANS computations for an oscillatory non‐isothermal triple‐jet using the k–ε and second moment closure turbulence models

Nishimura

Kimura²

2003

Numerical Methods in Fluids

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SUMMARYLow Reynolds number turbulence stress and heat flux equation models (LRSFM) have been developed to enhance predictive capabilities. A new method is proposed for providing the wall boundary condition for dissipation rate of turbulent kinetic energy, , to improve the model capability upon application of coarse meshes for practical use. The proposed method shows good agreement with accepted correlations and experimental data for ows with various Reynolds and Prandtl numbers including transitional regimes. Also, a mesh width about 5 times or larger than that used in existing models is applicable by using the present boundary condition. The present method thus enhanced computational e ciency in applying the complex turbulence model, LRSFM, to predictions of complicated ows. Unsteady Reynolds averaged Navier-Stokes (URANS) computations are conducted for an oscillatory non-isothermal quasiplanar triple-jet. Comparisons are made between an experiment and predictions with the LRSFM and the standard k-model. A water test facility with three vertical jets, the cold in between two hot jets, simulates temperature uctuations anticipated at the outlet of a liquid metal fast reactor core. The LRSFM shows good agreement with the experiment, with respect to mean proÿles and the oscillatory motion of the ow, while the k-model under-predicts the mixing due to the oscillation, such that a transverse mean temperature di erence remains far downstream.

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“…Measurements of local heat transfer coefficients and friction factors for transitional and laminarizing flows have been obtained by Ogawa et al (1982) and Ogawa and Kawamura (1986) with circular tubes. Local Nusselt numbers were measured for annuli by Fujii et al (1991) and Torii et al (1991). For dominant forced convection in low Mach number pipe flow with significant gas property variations, the only published mean profiles of temperature and velocity to guide the development of predic tive turbulence models were measured by Perkins (1975) and Shehata and McEligot (1995).…”

Section: Experiments and Turbulence Modelingmentioning

confidence: 99%

Large eddy simulation of compressible turbulent pipe flow with heat transfer

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BIBLIOGRAPHY 144 ACKNOWLEDGMENTS 153 R gas constant Rij Reynolds subgrid-scale stress tensor R residual vector r radius of pipe K preconditioned residual vector Ra Rayleigh number Re generic Reynolds number Rep bulk Re based on hydraulic diameter (= piUbDh/nb) Re re f Re based on reference quantities (= p re fV re fL re }/prej) Re T Reynolds number based on friction velocity (= p re fU T D/p re f) Reg bulk Re based on half-distance between inner wall and outer wall of annular (= pbiibô/nb) S magnitude of cell face area vector or skewness factor S cell face area vector Sij strain rate tensor

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Experimental and Theoretical Investigations on Heat Transfer of Strongly Heated Turbulent Gas Flow in an Annular Duct

Cited by 8 publications

References 7 publications

AN ASSESSMENT OFk–ω ANDv²–fTURBULENCE MODELS FOR STRONGLY HEATED INTERNAL GAS FLOWS

AN ASSESSMENT OFk–ω ANDv²–fTURBULENCE MODELS FOR STRONGLY HEATED INTERNAL GAS FLOWS

URANS computations for an oscillatory non‐isothermal triple‐jet using the k–ε and second moment closure turbulence models

Large eddy simulation of compressible turbulent pipe flow with heat transfer

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Experimental and Theoretical Investigations on Heat Transfer of Strongly Heated Turbulent Gas Flow in an Annular Duct

Cited by 8 publications

References 7 publications

AN ASSESSMENT OFk–ω ANDv2–fTURBULENCE MODELS FOR STRONGLY HEATED INTERNAL GAS FLOWS

AN ASSESSMENT OFk–ω ANDv2–fTURBULENCE MODELS FOR STRONGLY HEATED INTERNAL GAS FLOWS

URANS computations for an oscillatory non‐isothermal triple‐jet using the k–ε and second moment closure turbulence models

Large eddy simulation of compressible turbulent pipe flow with heat transfer

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AN ASSESSMENT OFk–ω ANDv²–fTURBULENCE MODELS FOR STRONGLY HEATED INTERNAL GAS FLOWS

AN ASSESSMENT OFk–ω ANDv²–fTURBULENCE MODELS FOR STRONGLY HEATED INTERNAL GAS FLOWS