Investigation of heat transfer on 2024 aluminum alloy thin sheets by water spray quenching

Guo, Ruichao; Wu, Jianjun; Liu, Weiping; Zhang, Zengkun; Wang, Mingzhi; Guo, Shaochang

doi:10.1016/j.expthermflusci.2015.11.014

Cited by 9 publications

(7 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…One can notice that the strip is cooled from 400°C to the water temperature on a rather small distance indicating that cooling rate of about 650 °C/s can be readily achieved. The type of boiling curve is in very good agreement with data published in literature such as [8,9]. Nozzle #1 P=200 kPa T s =21°C…”

Section: Illustrative Resultssupporting

confidence: 88%

See 1 more Smart Citation

Determination of boiling curve of spray cooling by IR thermography

Buchlin¹,

Gouriet²,

Delsipee³

et al. 2018

Proceedings of the 2018 International Conference on Quantitative InfraRed Thermography

View full text Add to dashboard Cite

An experimental IR thermography technique allowing the determination of the boiling curve during water spray cooling of a hot thin moving steel strip is presented. The dedicated test facility, called SprayCooling, is described. The thin thermal foil approach is combined with the strip temperature measurement obtained by IR camera. The accuracy of the method relies mainly upon the estimation of the local derivative of the temperature profile. Therefore, smooth temperature profiles are obtained by thermogramme averaging and filtering techniques. Finally, the heat transfer coefficient is obtained for strip temperature varying from 20°C to more than 400°C and at different water mass fluxes. The study deals with an experimental technique based on the use of the IR thermography to determine the heat transfer coefficient characterizing the cooling of a hot moving steel strip by water sprays.

show abstract

Section: Illustrative Resultssupporting

confidence: 88%

“…The effect of the degree of subcooling has not been deeply analyzed in the literature so far and the scarce data published are often opposing [9]. Figure 8 displays the results obtained for two degrees of subcooling.…”

Section: Fig 5 Repeatability Levelmentioning

confidence: 99%

Determination of boiling curve of spray cooling by IR thermography

Buchlin¹,

Gouriet²,

Delsipee³

et al. 2018

Proceedings of the 2018 International Conference on Quantitative InfraRed Thermography

View full text Add to dashboard Cite

show abstract

“…In an earlier investigation [18] we demonstrated that the water temperature and nozzle pressure had a significant influence on heat transfer of aluminum 2024. However, in industrial production, the two parameters are difficult to perform and may need higher cost.…”

Section: Mascarenhas and Mudawarmentioning

confidence: 86%

“…(4) with a smoothing parameter of 1e-3. Our previous study [18] indicates that the curves tend to neither depart excessively from measured temperature points nor smooth away physically meaningful features of curves when smoothing parameter is1e-3. Fig.…”

Section: 25mentioning

confidence: 90%

See 1 more Smart Citation

The effects of spray characteristic on heat transfer during spray quenching of aluminum alloy 2024

Guo

et al. 2016

Experimental Thermal and Fluid Science

Self Cite

View full text Add to dashboard Cite

A spray quenching apparatus was performed and hot aluminum alloy 2024 thin sheets were spray quenched by two symmetrically arranged nozzles. The influence of spray nozzle distance on heat transfer was experimentally investigated. The results show that there is no film boiling regime and Leidenfrost point at different nozzle distance. Both critical heat flux (CHF) value and surface temperature at which CHF occurs first decrease to the minimum value with increased nozzle distance, and then increase until reach the maximum value. Finally, CHF value and surface temperature decrease with further increase of nozzle distance. However, the maximum CHF value is observed when nozzle distance is 70 mm, and the highest surface temperature at which CHF occurs is obtained at nozzle distance of 80 mm. A nozzle distance of 80 mm is better since there exists a longer nucleate boiling regime and a relatively higher CHF value. This phenomenon may have guiding significance for industrial production.

show abstract