Gradient heat flux measurement while researching of saturated water steam condensation

Mityakov, V. Yu.; Сапожников, С. З.; Zainullina, E. R.; Babich, A Yu; Milto, O A; Kalmykov, Konstantin

doi:10.1088/1742-6596/891/1/012128

Cited by 3 publications

(3 citation statements)

References 2 publications

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“…To verify the obtained data, the heat flux at various points was measured 2…3 times. Our work repeats the studies [9,10,18] in its methods, however, use of thermal imager makes it possible to solve the problem connected with the investigation of heat transfer at any nonisothermal surface [19,20].…”

Section: Resultsmentioning

confidence: 72%

Investigation of flow and heat transfer at the circular fins

et al. 2018

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For simultaneous investigation of heat transfer and hydraulic parameters of finned circular tube is proposed to connect PIV (Particle Image Velocimetry) method and thermal imaging with gradient heat flux measurement. In the first series of experiments, the hollow fin was investigated. The hollow fin was heated with saturated water steam and its isothermal surface simulated the ideal (isothermal) fin. The solid fin made of titanium alloy was investigated in similar regimes for comparison. In the second series, the influence of distance between fins on the heat transfer coefficients (HTC) at the circular fin, mounted on a circular cylinder was studied. The unique Gradient Heat Flux Sensors (GHFSs) were installed at different places of the fin surface. Comprehensive method including heat flux measurement, PIV and thermal imaging allows to study flow and heat transfer at the surface of the fin in real time. Possibility of complex study of flow and heat transfer for non-isothermal fins is shown.

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Section: Resultsmentioning

confidence: 72%

Investigation of flow and heat transfer at the circular fins

et al. 2018

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“…GHFS and GHFS-based measuring devices have proven to be possible and reasonable for use in determining temperature, the flow rate of liquid or gas, frictional shear stress, electric current power, etc. It is worth noting that HGHFS has been proven in the study of steam condensation [16] and water boiling [17] as well.…”

Section: Experimental Procedures 21 Gradient Heatmetrymentioning

confidence: 99%

Gradient Heatmetry in a Burners Adjustment

et al. 2022

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Measuring the heat flux in the furnace of industrial boilers is an urgent task in the power industry. Installing the measuring instruments directly into the furnace is a laborious and complex process. It requires a complete shutdown of the boiler, which incurs economic costs. It is most efficient to use portable probes with measuring insert. The created cooled probe with a heterogeneous gradient heat flux sensor is a unique and versatile tool that allows for the configuration and control of the operation of power boilers. This article compares experimental values with calculation methods. The obtained heat flux per unit area is in good agreement with the theoretical concepts when the values are averaged. The technique used in this paper makese it possible to determine the maximum heat-stressed zones and areas with stable or unstable combustion. The main combustion zones that are typical for the flaring of any fuel are identified. This approach allows us to consider various approaches to heat transfer enhancement during the combustion of both liquid and gaseous fuels. Comparison of experimental results with the data of other authors is not quite exact due to the complexity of the experiment. The study of burners in this configuration has not previously been considered in the literature.

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“…The first experiments of gradient heat flux measurement carried out in 1996 [8], were of a pioneer nature, but of little practical importance: sensors based on bismuth are inoperable above 200 ... 250 ° C. Approbation of gradient heat flux sensors is shown in [8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Gradient heat flux measurement as monitoring tool for the diesel engine

Mityakov

Vintsarevich

et al. 2018

MATEC Web Conf.

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The usage of gradient heat flux measurement for monitoring of heat flux on combustion chamber surface and optimization of diesel work process is proposed. Heterogeneous gradient heat flux sensors can be used at various regimes for an appreciable length of time. Fuel injection timing is set by the position of the maximum point on the angular heat flux diagram however, the value itself of the heat flux may not be considered. The development of such an approach can be productive for remote monitoring of work processes in the cylinders of high-power marine engines.

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Gradient heat flux measurement while researching of saturated water steam condensation

Cited by 3 publications

References 2 publications

Investigation of flow and heat transfer at the circular fins

Investigation of flow and heat transfer at the circular fins

Gradient Heatmetry in a Burners Adjustment

Gradient heat flux measurement as monitoring tool for the diesel engine

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