Thermal conditions of a heat supply object with local heat supply to the working zone from a gas infrared emitter under mixed convection conditions

2021 ◽  
Author(s):  
B. V. Borisov ◽  
A. V. Vyatkin ◽  
V. I. Maksimov ◽  
T. A. Nagornova
Keyword(s):  
Mixed Convection ◽  
Heat Supply ◽  
Thermal Conditions ◽  
Local Heat ◽  
Working Zone ◽  
Infrared Emitter

An Experimental Study of High Rayleigh Number Mixed Convection in a Rectangular Enclosure With Restricted Inlet and Outlet Openings

1987 ◽  
Vol 109 (2) ◽  
pp. 446-453 ◽  
Author(s):  
L. Neiswanger ◽  
G. A. Johnson ◽  
V. P. Carey
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Coefficient ◽  
Rayleigh Number ◽  
Mixed Convection ◽  
Transfer Coefficient ◽  
Heated Surface ◽  
Local Heat Transfer ◽  
Local Heat ◽  
Test Fluid ◽  
Rectangular Enclosure

Measured local heat transfer data and the results of flow visualization studies are reported for cross-flow mixed convection in a rectangular enclosure with restricted inlet and outlet openings at high Rayleigh number. In this study, experiments using water as the test fluid were conducted in a small-scale test section with uniformly heated vertical side walls and an adiabatic top and bottom. As the flow rate through the enclosure increased, the enhancement of heat transfer, above that for natural convection alone, also increased. The variation of the local heat transfer coefficient over the heated surface was found to be strongly affected by the recirculation of portions of the forced flow within the enclosure. Mean heat transfer coefficients are also presented which were calculated by averaging the measured local values over the heated surface. A correlation for the mean heat transfer coefficient is also proposed which agrees very well with the experimentally determined values. A method of predicting the flow regime in this geometry for specified heating and flow conditions is also discussed.

scholarly journals Innovative local heat supply stations for industrial buildings

2019 ◽  
Vol 643 ◽  
pp. 012097
Author(s):  
V D Volkov ◽  
V A Sergeev ◽  
V P Shelyakin ◽  
N V Sitnikov ◽  
S A Goremykin ◽  
...  
Keyword(s):  
Heat Supply ◽  
Local Heat ◽  
Industrial Buildings

scholarly journals Bioenergy for regions – alternative cropping systems and optimisation of local heat supply

2011 ◽  
Author(s):  
C. Konrad ◽  
B. Mast ◽  
S. Graeff-Hönninger ◽  
W. Claupein ◽  
R. Bolduan ◽  
...  
Keyword(s):  
Heat Supply ◽  
Cropping Systems ◽  
Local Heat

An Experimental Investigation of the Heat Transfer to a Turbine Vane at Simulated Engine Conditions

1979 ◽  
Author(s):  
R. E. York ◽  
L. D. Hylton ◽  
R. G. Fox ◽  
J. C. Simonich
Keyword(s):  
Heat Transfer ◽  
Local Heat Transfer ◽  
Thermal Conditions ◽  
Local Heat ◽  
Data Sets ◽  
Transfer Data ◽  
Free Stream Turbulence ◽  
Turbine Vane ◽  
Turbulence Data ◽  
Few Data

Full application of 2D boundary layer calculations for heat transfer predictions during turbine vane design still awaits verification against relevant data. Although there are a few data sets in the literature, there is a definite need for basic vane heat transfer data under conditions that fully simulate the aerodynamic and thermal conditions of a modern turbine. Accordingly, an experiment was performed to obtain the local heat transfer distribution on a typical engine vane in an aerothermodynamic cascade facility. Heat transfer data were obtained for a range of Mach and Reynolds numbers. The cascade was closely coupled behind the facility burner so that the test included the effects of high free-stream turbulence. Turbulence data were obtained by LDV and are included.

Impairment of Local Heat Transfer of the Turbulent Mixed Convection in a Vertical Flat Plate

2018 ◽  
Author(s):  
Myeong-Seon Chae ◽  
Bum-Jin Chung
Keyword(s):  
Heat Transfer ◽  
Mass Transfer ◽  
Mixed Convection ◽  
Flat Plate ◽  
Forced Convection ◽  
Convection Heat Transfer ◽  
Local Heat Transfer ◽  
Local Heat ◽  
Convection Heat ◽  
Vertical Flat Plate

The heat transfer of the buoyancy-aided turbulent mixed convective flow in a vertical flat plate was investigated experimentally. Mass transfer experiments were carried out based on the heat and mass transfer analogy. The Rayleigh numbers ranged from 1.69 × 108 to 2.11 × 1013, depending on the height of the vertical flat plate. The Reynolds numbers varied from 4,585 to 17,320 for turbulent regimes. The test results for turbulent forced convections agreed well with the forced convection correlations established by Petukhov et al. The local heat transfer rates of the turbulent mixed flow exhibited the impairment of heat transfer compared to the forced convection and non-monotonous behavior along the axial position due to buoyancy effect. The local minimum heat transfer was 38.6% lower than the forced convection heat transfer. The turbulent mixed convection heat transfer is affected by the height of vertical plate.

Effect of local heat supply to a turbulent boundary layer on the friction

1997 ◽  
Vol 32 (1) ◽  
pp. 39-45 ◽  
Author(s):  
A. V. Kazakov ◽  
M. N. Kogan ◽  
A. P. Kuryachii
Keyword(s):  
Boundary Layer ◽  
Turbulent Boundary Layer ◽  
Heat Supply ◽  
Local Heat
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