Spray evaporative cooling to achieve ultra fast cooling in runout table

Bhattacharya, Pushpak; Samanta, Arghya; Chakraborty, Sudipto

doi:10.1016/j.ijthermalsci.2009.01.015

Cited by 103 publications

(39 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In view of the above characteristics, there is more fresh water directed on the steel surface per unit time to achieve a comprehensive nuclear boiling rather than film boiling. [12][13][14][15][16][17] The above are the reasons why UFC technology can achieve very fast cooling effect on the surface by forced convection and heat transfer. However, the cooling process is achieved by heat conduction inside the plate, and cooling effect slows down with increase in thickness.…”

mentioning

confidence: 99%

The Relationship Between Microstructural Evolution and Mechanical Properties of Heavy Plate of Low-Mn Steel During Ultra Fast Cooling

Wang

et al. 2015

Metall Mater Trans A

View full text Add to dashboard Cite

We describe here the electron microscopy and mechanical property studies that were conducted in an industrially processed 20-and 40-mm C-Mn thick plates that involved a new approach of ultrafast cooling (UFC) together with significant reduction in Mn-content of the steel by~0.3 to 0.5 pct, in relation to the conventional C-Mn steels, with the aim of cost-effectiveness. The study demonstrated that nanoscale cementite precipitation occurred during austenite transformation in the matrix of heavy plate during UFC, providing significant precipitation strengthening. With decrease in UFC stop temperature and consequent increase in the degree of undercooling, there was a transition in the morphology of cementite from lamellar to irregular-shaped nanoscale particles in the 20 mm heavy plate. With the increase in plate thickness, nanoscale cementite precipitated in bainitic lath at the surface of 40 mm heavy plate, which significantly increased the strength and decreased the elongation. Simultaneously, microstructural evolution in hot-rolled sheets was studied via simulation experiments using laboratory rolling mill to define the limits of microstructural evolution that can obtained in the UFC process and develop an understanding of the evolved microstructure in terms of process parameters.

show abstract

mentioning

confidence: 99%

The Relationship Between Microstructural Evolution and Mechanical Properties of Heavy Plate of Low-Mn Steel During Ultra Fast Cooling

Wang

et al. 2015

Metall Mater Trans A

View full text Add to dashboard Cite

show abstract

“…The other important characteristic of a low surface tension coolant is that it can atomize into droplets of smaller sizes by air in the atomization process (Cavitations theory [43]). The finer droplet size allows better evaporation qualities from the impingement surface compared to that of larger ones [2]. Also, surface tension alters the vapour film instability and bubble nucleation which causes enhanced heat transfer rate in transition and nucleate boiling regimes [44,45].…”

Section: Boiling Curvementioning

confidence: 99%

“…The ability of high momentum liquid sprays to extract high heat flux at controlled rates from the metals parts operated above 600 C has made them invaluable in these applications. As the temperature of the metal parts is above Leidenfrost point [1], heat transfer occurs through boiling of spray droplets which can be called spray evaporative cooling [2]. On the basis of the evaporation period of the droplet on the hot surface, different boiling regimes namely film boiling, transition boiling, nucleate boiling and single-phase forced convection occur sequentially during cooling.…”

Section: Introductionmentioning

confidence: 99%

Heat transfer enhancement using air-atomized spray cooling with water–Al2O3 nanofluid

Ravikumar

Haldar

Jha

et al. 2015

International Journal of Thermal Sciences

View full text Add to dashboard Cite

“…There are enormous experimental and computational studies that have been conducted to get the overall theoretical understanding and potential application of spray cooling in different fields of technology [4 -6]. Due to the complex nature of the interaction of liquid and vapor phase, liquid impact, and phase change in spray cooling, it is difficult to understand the heat removal phenomena, so overall understanding of spray cooling is still in its infancy [1,2]. Extensive experimental and computational work is still required to get the complete picture of the mechanism underlying the heat transfer phenomena during spray cooling.…”

Section: Introductionmentioning

confidence: 99%

Study on Ultra-fast Cooling Behaviors of Water Spray Cooled Stainless Steel Plates

Aamir

Liu

Zhu

et al. 2015

Experimental Heat Transfer

View full text Add to dashboard Cite

Spray cooling is an effective tool to dissipate high heat fluxes from hot surfaces. This article thoroughly investigates the effect of thickness of a hot stainless steel plate on the cooling time, cooling rate, heat flux, and heat transfer coefficient under constant mass flow rate maintained at 1 MPa using water as the coolant. Cylindrical samples of stainless steel with constant diameter (D 5 25 mm) and thickness (d 5 7.5, 12, 16.5, and 21 mm) were used in the present study. Critical droplet diameter to achieve an ultra-fast cooling rate of 3008C/s was estimated by using an analytical model for samples of varying thicknesses. The analytical model (one side spray cooling) showed good agreement with experimental results with a relative error of 3.2% in the plate thickness range of 1-12 mm. An increasing trend in maximum heat flux was found with increasing thickness of the plate. Maximum heat flux as high as 1,800 kW/m 2 was achieved for a 21-mm-thick sample. Heat transfer coefficients in the range 0.092-96.24 kW/m 2 K, 0.111-98.9 kW/m 2 K, 0.074-63.4 kW/m 2 K, and 0.127-55.63 kW/m 2 K were reported for sample of varying thicknesses in the present study. Limited published work is available with reference to water spray cooling dynamics and thickness of stainless steel plate. Therefore, the present study focuses on the correlation between the thickness of the plate and spray dynamics of water spray cooling.

show abstract

Spray evaporative cooling to achieve ultra fast cooling in runout table

Cited by 103 publications

References 10 publications

The Relationship Between Microstructural Evolution and Mechanical Properties of Heavy Plate of Low-Mn Steel During Ultra Fast Cooling

The Relationship Between Microstructural Evolution and Mechanical Properties of Heavy Plate of Low-Mn Steel During Ultra Fast Cooling

Heat transfer enhancement using air-atomized spray cooling with water–Al2O3 nanofluid

Study on Ultra-fast Cooling Behaviors of Water Spray Cooled Stainless Steel Plates

Contact Info

Product

Resources

About