By reviewing the structural dimensions of the gourd-shaped kiln and conducting on-site measurements of reconstructed and refired kilns, the basic structural data of the gourd-shaped kiln were obtained. Subsequently, a structural calculation model of the gourd-shaped kiln was constructed using 3D modeling software. Computational fluid dynamics software, FLUENT 16.0, was then used to conduct a numerical simulation study of the temperature field and flow field inside the kiln. The results show that during the firing process, the gourd-shaped kiln can reach a maximum firing temperature of 1330 °C.Notably, in the constricted waist area of the kiln, the temperature variation between the front and rear is most significant, with a maximum difference of 40 °C. Moreover, the flue gas velocity at the top of the kiln can reach a maximum of 2.3 m/s, forming a reverse flame flow pattern. After passing through the constricted waist area, the flue gas velocity decreases from a maximum of 1.5 m/s to 0.5 m/s. Finally, through fitting analysis of the numerical simulation data and on-site measurement data, the correctness of the numerical simulation parameter settings in this model was verified, providing a reliable basis for the parameter settings of numerical models in subsequent studies on the structural evolution of the gourd-shaped kiln.

Keywords: Gourd-shaped kiln, thermal engineering theory, Temperature field, Flow analysis.