Design and fluid-thermal coupling of a strong quenching tank with double vortex flow field

doi:10.13251/j.issn.0254-6051.2021.11.048

Abstract

Abstract: In view of the lack of strong quenching equipment with uniform, high-speed and stable flow field, a physical model of quenching tank of strong quenching equipment with double vortex flow field was designed. The fluid mechanics analysis was carried out by using Fluent software, and the internal flow field of quenching tank of strong quenching equipment was studied. Based on the three-dimensional Reynolds average conservation N-S equation and the standard k-ε turbulence model, the flow field generated in the quenching tank was numerically calculated with the water inlet velocity of 3.0, 3.5, 4.0 m/s. The temperature field for specimen of 0.45% carbon steel in the quenching tank was calculated by the fluid-thermal coupling analysis. The results indicate that the liquid phase medium flow forms a double vortex fluid field in the quenching tank and a circulation field around part forms with high speed and stable flow. For the optimal process, the speed of the circulation field is 2.0 m/s when the water inlet speed is 4.0 m/s. This speed makes the cooling rate of 650 ℃/s for 0.45% carbon steel specimen, which fully meets the requirement of strong quenching.

Key words: strong quenching, computational fluid dynamics, temperature field, numerical simulation

CLC Number:

Qu Zhe, Zhu Xiaoshuo, Xing Ruofei, Fu Yudong. Design and fluid-thermal coupling of a strong quenching tank with double vortex flow field[J]. Heat Treatment of Metals, 2021, 46(11): 262-269.

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