Methodology for predicting spray quenching of thick-walled metal alloy tubes

Mascarenhas, Nikhin; Mudawar, Issam

doi:10.1016/j.ijheatmasstransfer.2012.02.018

Cited by 20 publications

(8 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…When CC is modelled for design or control purposes, they discovered that the velocity of motion of the cooled surface is still another variable that must be considered. Reduced orifice-to-surface distance (standoff distance) increased the magnitude of volumetric flux, which has been reported in comparative work between steel and aluminum [61]. This has been shown to hasten the onset of the rapid cooling stages of the quench while also improving overall cooling efficacy.…”

Section: Introductionmentioning

confidence: 70%

Computational Studies of Air-Mist Spray Cooling in Continuous Casting

Anisiuba

Silaen

et al. 2021

Energies

View full text Add to dashboard Cite

Due to the significant reduction in water droplet size caused by the strong air-water interaction in the spray nozzle, air-mist spray is one of the promising technologies for achieving high-rate heat transfer. This study numerically analyzed air-mist spray produced by a flat-fan atomizer using three-dimensional computational fluid dynamics simulations, and a multivariable linear regression was used to develop a correlation to predict the heat transfer coefficient using the casting operating conditions such as air-pressure, water flow rate, casting speed, and standoff distance. A four-step simulation approach was used to simulate the air-mist spray cooling capturing the turbulence and mixing of the two fluids in the nozzle, droplet formation, droplet transport and impingement heat transfer. Validations were made on the droplet size and on the VOF-DPM model which were in good agreement with experimental results. A 33% increase in air pressure increases the lumped HTC by 3.09 ± 2.07% depending on the other casting parameters while an 85% increase in water flow rate reduces the lumped HTC by 4.61 ± 2.57%. For casting speed, a 6.5% decrease in casting speed results in a 1.78 ± 1.42% increase in the lumped HTC. The results from this study would provide useful information in the continuous casting operations and optimization.

show abstract

Section: Introductionmentioning

confidence: 70%

Computational Studies of Air-Mist Spray Cooling in Continuous Casting

Anisiuba

Silaen

et al. 2021

Energies

View full text Add to dashboard Cite

show abstract

“…The spray parameters that have the strongest influence on cooling performance are volumetric flux, Sauter mean diameter, and mean drop (Rybicki and Mudawar, 2006) Another study also dealt with spray cooling of rods and exteriors of tube bundles (Chang, 2006). Mascarenhas and Mudawar (2012) reported in their comparative work between steel and aluminum that increasing nozzle pressure drop or decreasing orifice-to-surface distance increased the magnitude of volumetric flux, which hastened the onset of the rapid cooling stages of the quench as well as improved overall cooling effectiveness. The sprayed surface was characterized by fast thermal response to the spray, while regions within the wall displayed more gradual response due to heat diffusion delays.…”

Section: Effect Of Mass Fluxmentioning

confidence: 99%

Impingement Cooling of Hot Metal Strips in Runout Table - A Review

Mishra

Nayak

Pradhan

et al. 2015

Interfac Phenom Heat Transfer

View full text Add to dashboard Cite

Impingement cooling is an important and new cooling technique used in the steel quenching process. Unfortunately, little experimental data are available on the rate of heat extraction from the steel surface. For example, as one of the most important heat treatment processes, quenching of steel refers to the cooling from the solution treating temperature, typically 845 • C-870 • C, into the hard structure martensite. This paper addresses a comprehensive literature survey on different cooling techniques and various factors affecting the heat transfer characteristics during these cooling schemes.

show abstract

“…The spray quenching method also required constant water pressure to prevent the Leidenfrost effect. Hence this research used the device from Nilfisk C110-3-5 X-TRA type [9].…”

Section: Introductionmentioning

confidence: 99%

Hardness Uniformity in AISI 4140 Using Spray Quenching Method

Achyarsyah¹,

Puspitasari²

2020

Metallofiz. Noveishie Tekhnol.

View full text Add to dashboard Cite

Bucket teeth are a part of the coal process circuit in bucket excavator machine. It is used to dredge the overburden or a piece of the land that covers coal piles. Bandung Polytechnic of Manufacturing produces the product with AISI 4140 steel. The problem with batch production is that it has a wide variety of hardness as the result of using a quenching by blower. Therefore, there needs an alternative to a thinner hardness of bucket teeth. This research explores the possibility of using spray quenching method. The method uses the spray to quench the samples on the rotated concrete steel shelf evenly. The Shore scleroscope hardness test performs three times on the products at two points: the tip and 80 mm from the tip. The results are averaged later on. They show that spray quenching produced a thinner hardness variety compared to the blower product. Product using blower has the hardness of 25.16 HRB at point 1 and 15.66 HRB at point 2. Product with the first spray quenching has the hardness of 15.1 HRB at point 1 and 11.56 HRB at point 2, and after the second spray quenching became 7.3 HRB at point 1 and 8.4 HRB at point 2. Thus, spray quenching provides a more uniform hardness along the teeth and can be a substitute for the traditional quenching method.

show abstract

Methodology for predicting spray quenching of thick-walled metal alloy tubes

Cited by 20 publications

References 29 publications

Computational Studies of Air-Mist Spray Cooling in Continuous Casting

Computational Studies of Air-Mist Spray Cooling in Continuous Casting

Impingement Cooling of Hot Metal Strips in Runout Table - A Review

Hardness Uniformity in AISI 4140 Using Spray Quenching Method

Contact Info

Product

Resources

About