NUMERICAL ANALYSIS OF HEAT TRANSFER FOR JET IMPINGEMENT ON A HOT STEEL PLATE DURING SECONDARY COOLING

2018 ◽  
Author(s):  
Haibo Ma ◽  
Justina Lee ◽  
Rui Liu ◽  
Michael Lowry ◽  
Armin Silaen ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Numerical Analysis ◽  
Steel Plate ◽  
Jet Impingement ◽  
Secondary Cooling

Comparison of Various RANS Models for Impinging Round Jet Cooling From a Cylinder

2019 ◽  
Vol 141 (6) ◽  
Author(s):  
Ketan Atulkumar Ganatra ◽  
Dushyant Singh
Keyword(s):  
Heat Transfer ◽  
Numerical Analysis ◽  
Turbulence Model ◽  
Three Dimensional ◽  
Turbulence Models ◽  
Jet Impingement ◽  
Target Surface ◽  
Point Of View ◽  
Nozzle Diameter ◽  
Round Jet

The numerical analysis for the round jet impingement over a circular cylinder has been carried out. The v2f turbulence model is used for the numerical analysis and compared with the two equation turbulence models from the fluid flow and the heat transfer point of view. Further, the numerical results for the heat transfer with original and modified v2f turbulence model are compared with the experimental results. The nozzle is placed orthogonally to the target surface (heated cylindrical surface). The flow is assumed as the steady, incompressible, three-dimensional and turbulent. The spacing between the nozzle exit and the target surface ranges from 4 to 15 times the nozzle diameter. The Reynolds number based on the nozzle diameter ranges from 23,000 to 38,800. From the heat transfer results, the modified v2f turbulence model is better as compared to the other turbulence models. The modified v2f turbulence model has the least error for the numerical Nusselt number at the stagnation point and wall jet region.

Transient Cooling of a Hot Steel Plate by an Inclined Bottom Jet

2006 ◽  
Vol 15-17 ◽  
pp. 738-743 ◽  
Author(s):  
N.L. Chester ◽  
Mary A. Wells ◽  
V. Prodanovic ◽  
Matthias Militzer
Keyword(s):  
Heat Transfer ◽  
High Efficiency ◽  
Steel Plate ◽  
Water Flow Rate ◽  
Jet Impingement ◽  
Steel Mill ◽  
Controlled Cooling ◽  
Experimental Database ◽  
Impingement Point ◽  
Runout Table

Controlled cooling on the runout table is a crucial component in the production of highly tailored steels since it has a strong influence on the final mechanical properties. High efficiency heat transfer in impinging jet cooling makes this an important method for heat transfer enhancement. The purpose of this study is to develop an experimental database for modelling of boiling heat transfer for bottom jet impingement that occurs during runout table cooling in a steel mill. Experiments have been carried out on a pilot scale runout table using stationary plates, with focus on the effect of water flow rate and nozzle inclination to the overall heat transfer rates. Volumetric flow rates and inclination angles are in the range of 35-55 l/min and 0-30º, respectively. Temperatures on the test plates are measured internally very close to the surface during cooling for the purpose of reducing thermal lag and receiving better data responsiveness. These measurements are taken at the impingement point and several streamwise distances from the impingement point. From the above measurements transient cooling data on the hot steel plate by bottom jet impingement has been analysed.

Visual Observation of Circular Water Jet Impingement Boiling on Stationary Hot Steel Plate

2015 ◽  
Vol 137 (8) ◽  
Author(s):  
Sangho Sohn ◽  
Jaebum Park
Keyword(s):  
Heat Transfer ◽  
Forced Convection ◽  
Steel Plate ◽  
Jet Impingement ◽  
Visual Observation ◽  
Water Jet ◽  
Cooling Curve ◽  
Impingement Heat Transfer ◽  
Jet Impingement Boiling ◽  
Temperature Heat

The time-and space-resolved water jet impingement heat transfer on stationary hot steel plate was measured by a novel experimental technique that has a function of high-temperature heat flux gauge. The simultaneous visual observation was helpful to understand the complex heat transfer regimes occurring on a stationary hot steel plate cooled from 900°C by a circular water jet. The heat transfer regimes adjacent to a circular water jet impinging on a hot steel plate were known as to be classified into 5 distinct regimes; (I) single phase forced convection, (II) nucleate and transition boiling, (III) forced convection film boiling, (IV) agglomerated pools, (V) radiation and natural convection to surroundings. The observed images of water jet impingement boiling were well agreed with the measured cooling curve and boiling curve, so this study can provide the benchmark data for validating the 5 distinct regimes.

Numerical analysis of heat transfer intensity from twin slot vertical jet impingement on strip surface after hot rolling

2015 ◽  
Vol 22 (7) ◽  
pp. 2816-2824 ◽  
Author(s):  
Jian-hui Shi ◽  
Guo Yuan ◽  
Lian-yun Jiang ◽  
Kun Zhao ◽  
Guo-dong Wang
Keyword(s):  
Heat Transfer ◽  
Numerical Analysis ◽  
Hot Rolling ◽  
Jet Impingement ◽  
Strip Surface ◽  
Vertical Jet
Sign in / Sign up

Export Citation Format

Share Document