Numerical calculation of convective heat transfer coefficient and quenching simulation of 2195 Al-Li alloy hemispherical shell

doi:10.13251/j.issn.0254-6051.2025.01.038

Abstract

Abstract: By combining analytical and numerical methods, the convective heat transfer coefficient of 2195 aluminum lithium alloy hemispherical shell was approximately calculated, and the variation law of convective heat transfer coefficient with temperature under air cooling and water cooling conditions was analyzed. Using ABAQUS finite element simulation software, a thermo-mechanical coupling model was constructed, and the quenching process of the 2195 aluminum lithium alloy hemispherical shells with diameters of ø200 mm and ø100 mm was simulated by finite element method, and the stress and strain laws during the quenching process were analyzed. The results show that during the water cooling process, the heat transfer coefficient of the aluminum lithium alloy hemispherical shell increases first and then decreases with the surface temperature of the workpiece from low to high, and the peak point appears at around 175 ℃. During the air cooling process, the convective heat transfer coefficient increases with the increase of workpiece temperature. The simulation results of the quenching process indicate that stress concentration occurs at the mouth of the hemispherical shell, and plastic strain mainly occurs at the surface of the hemispherical shell mouth. The stress and strain distribution patterns of hemispherical shells with different sizes after cooling at different inlet water temperatures are similar.

Key words: convective heat transfer coefficient, 2195 aluminum lithium alloy, thermo-mechanical coupling, finite element simulation, quenching

CLC Number:

TG441.8

Song Kejin, Du Yue, Fu Xuesong, Kang Li, Du Baoxian, Zhou Wenlong. Numerical calculation of convective heat transfer coefficient and quenching simulation of 2195 Al-Li alloy hemispherical shell[J]. Heat Treatment of Metals, 2025, 50(1): 243-249.

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