Modeling and simulation of load heating in heat treatment furnaces

Kang, Jinwu; Ye, Rong

doi:10.1016/j.jmatprotec.2005.03.037

Cited by 34 publications

(16 citation statements)

References 9 publications

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“…Only a few reports are available where CFD modeling has been used to assist in the understanding of the gas flow behavior in an industrial furnace or incinerator. [15][16][17] For instance, Saxena et al [18] described a CFD model to predict temperatures of parts in a continuous belt furnace with respect to the belt speeds, part geometry, and loading rates. Stratton and Saxena [19] modeled the effect of the external factors, such as draughts, on the integrity of the furnace atmosphere and the effect of the component parameters on the heating and cooling of the components to optimize the sintering process.…”

Section: Introductionmentioning

confidence: 99%

The Effects of Sample Position and Gas Flow Pattern on the Sintering of a 7xxx Aluminum Alloy

Yuan

Aminossadati

Huo

et al. 2012

Metall Mater Trans A

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The effects of sample position and gas flow pattern on the sintering of a 7xxx aluminum alloy Al-7Zn-2.5Mg-1Cu in flowing nitrogen have been investigated both experimentally and numerically. The near-surface pore distribution and sintered density of the samples show a strong dependency on the sample separation distance over the range from 2 mm to 40 mm. The open porosity in each sample increases with increasing separation distance while the closed porosity remains essentially unchanged. A two-dimensional computational fluid dynamics (CFD) model has been developed to analyze the gas flow behavior near the sample surfaces during isothermal sintering. The streamlines, velocity profile, and volume flow rate in the cavity between each two samples are presented as a function of the sample separation distance at a fixed nitrogen flow rate of 6 L/min. The CFD modeling results provide essential details for understanding the near-surface pore distribution and density of the sintered samples. It is proposed that the different gas flow patterns near the sample surfaces result in variations of the oxygen content from the incoming nitrogen flow in the local sintering atmosphere, which affects the self-gettering process of the aluminum compacts during sintering. This leads to the development of different near-surface pore distributions and sintered densities.

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Section: Introductionmentioning

confidence: 99%

The Effects of Sample Position and Gas Flow Pattern on the Sintering of a 7xxx Aluminum Alloy

Yuan

Aminossadati

Huo

et al. 2012

Metall Mater Trans A

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“…Grassi et al [5] proposed an ablation casting method using a water curtain to erode away the sand mold bonded by water-soluble binders to achieve rapid solidification of a casting from one side to another. Kang et al [6] proposed the PSIRC (post-solidification intensive riser cooling) method to achieve fast and even cooling of heavy steel castings. However, these methods are limited to certain casting methods or alloys.…”

Section: Introductionmentioning

confidence: 99%

Modeling and Simulation of the Casting Process with Skeletal Sand Mold

et al. 2020

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The author-proposed skeletal sand mold, which mainly includes a shell, air cavities and a truss support structure, has been experimentally proven to be very useful in controlling the cooling of casting at local areas and at different periods of the casting process. The modeling and simulation of the casting process using a skeletal sand mold were systemically analyzed. Complicated casting/mold and mold/air boundaries, and the thermal and mechanical behavior of the skeletal sand mold during the casting process were highlighted. A numerical simulation of the casting process of a stress frame specimen using a skeletal sand mold was performed. The temperature, stress and displacement fields of the casting and skeletal sand mold were obtained and compared with those using a traditional sand mold. The simulated results were validated with experiments. Using the skeletal sand mold, the cooling rate of the casting can be greatly improved due to the significant heat release from mold surface to environment. The residual stress and deformation of the casting can be reduced because of the decreased stiffness of this kind of mold. Although the skeletal sand mold is susceptible to cracking, it can be avoided by filleting in the conjunctions and increasing the shell thickness.

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“…Aiming to elucidate the interlaminar bonding phenomenon of aluminum coils in hydrogen bell-type annealing furnaces, the temperature field and stress distribution of coils are theoretically studied by Saboonchi, Hassanpour, and Abbasi (2008) via establishing a numerical calculation model. Another heat transfer model containing the effects of the heat storage of the workpiece and the heat dissipation from the furnace wall is constructed using the simulation approach by Kang and Rong (2006). Mehta and Sahay (2009) established a heat transfer-phase transformation integrated model of aluminum coil annealing and analyzed the furnace productivity.…”

Section: Introductionmentioning

confidence: 99%

Three-dimensional fluid-solid coupling heat transfer simulation based on the multireference frame for a side-blown aluminum annealing furnace

Qiu

Feng

et al. 2019

Engineering Applications of Computational Fluid Mechanics

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In this study, a three-dimensional (3D) numerical simulation model for the flow and heat transfer in a side-blown aluminum annealing furnace (SAAF) is successfully established. Based on the vivid evolutions of the flow field and temperature field, it is confirmed that multiple vortices among the radially distributed nozzles play a key role in reducing the interior flow resistance of the SAAF. The simulated flow distribution agrees remarkably well with the on-site experimental data, which reveals that the model based on the multireference frame method is suitable for describing the 3D fluid-solid coupling heat transfer process inside the SAAF. In addition, to resolve the appreciably uneven temperature distribution in the SAAF, a scheme of guide plate arrangement around the fan is developed to adjust the flow pattern and facilitate the reasonable allocation of the nozzle flow. The standard deviation and the coefficient of variation are obviously declined (∼ 12%) for both low and standard airspeeds, thereby suggesting that the uniformity of the nozzle flow distribution are expectedly improved. The progress made so far is a substantial step toward achieving high quality, high efficiency and energy savings in aluminum production.

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Modeling and simulation of load heating in heat treatment furnaces

Cited by 34 publications

References 9 publications

The Effects of Sample Position and Gas Flow Pattern on the Sintering of a 7xxx Aluminum Alloy

The Effects of Sample Position and Gas Flow Pattern on the Sintering of a 7xxx Aluminum Alloy

Modeling and Simulation of the Casting Process with Skeletal Sand Mold

Three-dimensional fluid-solid coupling heat transfer simulation based on the multireference frame for a side-blown aluminum annealing furnace

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