Heat Transfer Characteristic of Slit Nozzle Impingement on High-temperature Plate Surface

Wang, Bingxing; Liu, Zhixue; Zhang, Bo; Wang, Zhaodong; Wang, Guodong

doi:10.2355/isijinternational.isijint-2018-576

Cited by 11 publications

(5 citation statements)

References 33 publications

(36 reference statements)

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“…The data for top jet cooling of stationary plates are taken from Nobari et al 10) while data of moving plate experiments conducted on a pilot scale facility will be first presented here before the model extension will be described. Similar experimental heat transfer studies have been conducted recently by Wang et al, 11) Lee et al, 12) and Fujimoto et al, 13) who investigated the heat transfer characteristics of multiple jets using various nozzle arrangements commonly employed on the runout table, as well as by Wang et al, 14) who investigated heat transfer of a slit jet impingement for ultra-fast cooling. These studies do, however, not contain any substantial modeling analysis such that they were not further considered in the present model development.…”

Section: Modeling Transient Jet Impingement Cooling Of Moving Hot Ste...supporting

confidence: 54%

Modeling Transient Jet Impingement Cooling of Moving Hot Steel Plates

et al. 2022

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Accelerated cooling (ACC) is one of the key processing steps in the production of Advanced High Performance Steels. In order to obtain thermo-mechanically controlled processed (TMCP) steel products with desired microstructures and mechanical properties, it is necessary to properly adjust the processing parameters of the cooling facility, and therefore it is critically important to quantify the physical process of heat removal by applying water jets on the hot surface of steel. In the present study we propose a mechanistic model for top jet cooling of a moving plate with circular and planar nozzles. The simulation model has been developed based on the extensive experimental database generated with pilot scale runout table tests, and it provides a potentially powerful tool for simulation of cooling of steel strips and plates over the entire length of the cooling facility. KEY WORDS: steel; jet impingement boiling; transient heat transfer; temperature modeling; accelerated cooling; runout table.

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Section: Modeling Transient Jet Impingement Cooling Of Moving Hot Ste...supporting

confidence: 54%

Modeling Transient Jet Impingement Cooling of Moving Hot Steel Plates

et al. 2022

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“…The calculated cumulative heat extracted during a given cooling period and overall heat extracted decreased with increasing the nozzle inclination (0-30°). Wang et al 19) studied the effect of nozzle inclination (0-45°) during stationary top cooling by a planar nozzle. No prominent effect was seen on the heat flux values in the impingement zone for different nozzle inclinations.…”

Section: Transient Bottom Jet Impingement Cooling Of Steelmentioning

confidence: 99%

“…Tilting the nozzle at an angle causes asymmetry in the flow 13,19) such that two directions, i.e. + x direction (along the inclination) and − x direction (opposite to the inclination), have been defined with respect to the jet centerline, as illustrated in Fig.…”

Section: Nozzle Inclinationmentioning

confidence: 99%

Transient Bottom Jet Impingement Cooling of Steel

2020

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Accelerated run-out table cooling has become a key technology that determines microstructure and resulting mechanical properties of thermo-mechanically controlled processed (TMCP) steels. The present study quantifies the heat transfer mechanisms during bottom jet cooling of a stationary steel plate with systematic pilot-scale experiments. The emphasis of the study is to quantify the effect of process parameters, i.e. jet impingement velocity, water temperature and nozzle orientation, on heat extraction rates. Experimental results are described and quantitatively analyzed, adding to the database for run-out table cooling.

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“…Many scholars have conducted numerous studies on the target surface flow and heat transfer properties under static jet impingement, focusing on the cooling medium, [6,7] nozzle structure, [8,9] jet Reynolds number, [10] distance of the nozzle from the target surface, [11] jet angle, [12][13][14] and nozzle layout. [15,16] The results show that the gas cooling intensity is too low.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Cooling Characteristics of Jet Impingement Hot‐Rolled Seamless Steel Tube in Motion

Li,

Zhang,

Zhang

et al. 2023

steel research int.

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This research uses numerical modeling to study the jet cooling properties of hot‐rolled seamless steel tubes under axial movement and circumferential rotation. The orthogonal test is used to examine the effects of axial velocity V, rotation speed R, jet distance S, and jet Reynolds number Re on the surface temperature distribution of steel tubes. The findings demonstrate that the temperature of the steel tube exhibits a “similar sinusoidal function” distribution along the circumference, with various angular frequencies and starting phases as a result of various cooling sites. It is determined that the axial velocity has the greatest influence on the temperature drop during the cooling process of steel tube, followed by the jet Reynolds number, the jet distance, and the rotation speed. When the axial velocity is 0.3–0.7 m s−1, the rotation speed is 30–45 rpm, the jet distance is 75–100 mm, and the jet Reynolds number is 38 000–51 000, the steel tube cooling efficiency is the best. The mathematical models of temperature drop ΔT and axial velocity V, rotation speed R, jet distance S, and Reynolds number Re are established. The maximum deviation of temperature drop between numerical simulation and mathematical model is only 1.02 °C with high prediction accuracy.

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Heat Transfer Characteristic of Slit Nozzle Impingement on High-temperature Plate Surface

Cited by 11 publications

References 33 publications

Modeling Transient Jet Impingement Cooling of Moving Hot Steel Plates

Modeling Transient Jet Impingement Cooling of Moving Hot Steel Plates

Transient Bottom Jet Impingement Cooling of Steel

Analysis of Cooling Characteristics of Jet Impingement Hot‐Rolled Seamless Steel Tube in Motion

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