Effects of multiple-nozzle distribution on large-scale spray cooling via numerical investigation

Xie, Qiang; Chen, Zuobing; Gong, Chang‐De; Yu, Yongjie; Zhao, Zheyu

doi:10.2298/tsci171223115x

Cited by 6 publications

(2 citation statements)

References 18 publications

(21 reference statements)

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“…Spray heat transfer has the properties of high heat flux, high heat transfer coefficient, excellent temperature uniformity and no contact thermal resistance with the heating surface and thus is superior to conventional heat transfer [8][9][10]. Fast and uniform heating of feedstock could be achieved through spray heat transfer between the atomized feedstock and surface of SiC bed heated by microwave.…”

Section: Introductionmentioning

confidence: 99%

Heat transfer in a novel microwave heating device coupled with atomization feeding

Xie

Mao

et al. 2022

THERM SCI

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The heat transfer characteristics of the microwave heating coupled with atomization feeding were investigated using ethanol as the spray medium on a pressure swirl nozzle. The effects of spray height, flow rate and temperature on the sauter mean diameter (SMD) of atomized droplets were examined. The results showed that the droplet SMD was 12-130 ?m, which increased with the spray height and decreased with the flow rate and temperature of spray medium. Through the fitting of the experimental data, the dimensionless correlation of the droplet SMD which was based on orifice diameter, Reynolds and Ohnesorge numbers was obtained. The calculated results were basically consistent with the experimental data within 15% error. The heat transfer characteristics of atomized droplets on high-temperature surface of SiC bed heated by microwave were then investigated. The effects of spray flow rate, spray height and spray temperature on the heat transfer characteristics were examined. The power of spray heat transfer decreased with the temperature and increased with the spray flow rate and spray height. The dimensionless correlation to describe the heat transfer characteristics of atomized droplets on the high-temperature SiC surface under the microwave heating was obtained which included thermophysical properties of spray medium, spray parameters, and temperatures of the high-temperature bed surface and spray medium, with the error of ?20%. These correlations can be used to predict the SMD of the atomized droplets and the power of spray heat transfer in the microwave heating process.

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Section: Introductionmentioning

confidence: 99%

Heat transfer in a novel microwave heating device coupled with atomization feeding

Xie

Mao

et al. 2022

THERM SCI

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“…Heat spray cooling is often utilized for high temperature quenching of metals [3] and the cooling of the superheated steam [4]. Recent studies have also focused on the heat spray cooling for electronic cooling purposes [5][6][7]. Heat spray cooling can cover a wide range of surface temperatures from cryogenic [8], medium [9] to very high surface temperatures [3].…”

Section: Introductionmentioning

confidence: 99%

Experimental study on the effect of the liquid/surface thermal properties on droplet impact

Lamini

Zhao

2021

Therm sci

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Droplet impact on hot surfaces is widely encountered in industry and engineering applications. In the present paper we investigate the effect of the combination of the droplet liquid type and the solid surface type and their effect on droplet impact dynamics. We test three surfaces, copper 110, aluminum 1199 and stainless steel 304, and two liquids, water and ethanol. These surfaces and liquids are characterized by high and low thermophysical properties. The three surfaces are tested with water to investigate the effect of the surface on the droplet dynamics. After that, we test both liquids with aluminum. Our findings showed that the Leidenfrost temperature does not always correlate with the surface thermal properties as reported in the literature. Some surfaces can undergo changes because of the heating and this reduces their initial thermal properties. For this reason, such surfaces are capable to show two Leidenfrost temperatures because of the thermophysical properties reduction during heating. Our findings also revealed that the Leidenfrost temperature of liquids with low thermophysical properties including surface tension, evaporation latent heat and density show trivial effect by the droplet impact velocity; i.e. the Leidenfrost temperature show trivial increase by increasing the droplet impact velocity. Liquids with high thermophysical properties show significant Leidenfrost temperature increase by increasing the impacting velocity.

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Numerical simulation of multi-array spray cooling for hot rolled seamless steel pipes

Zhang,

Li,

Zhang

et al. 2024

International Journal of Heat and Mass Transfer

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Effects of multiple-nozzle distribution on large-scale spray cooling via numerical investigation

Cited by 6 publications

References 18 publications

Heat transfer in a novel microwave heating device coupled with atomization feeding

Heat transfer in a novel microwave heating device coupled with atomization feeding

Experimental study on the effect of the liquid/surface thermal properties on droplet impact

Numerical simulation of multi-array spray cooling for hot rolled seamless steel pipes

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