Numerical Simulation and Verification of Heat Transfer during High-Temperature Heat Treatment of Eucalyptus Wood

GENG Jinguang; GUO Jin; HE Luxi; HE Zhengbin; YI Songlin

doi:10.12326/j.2096-9694.2022125

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Numerical Simulation and Verification of Heat Transfer during High-Temperature Heat Treatment of Eucalyptus Wood
1.College of Material Science and Technology，Beijing Forestry University
2.Beijing Key Laboratory of Wood Science and Engineering，Beijing 100083，China
Vol. 37, Issue 1, Pages: 48-54(2023)
DOI： 10.12326/j.2096-9694.2022125

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耿金光,郭晋,何露茜等.桉木高温热处理传热过程的数值模拟与验证[J].木材科学与技术,2023,37(01):48-54.

GENG Jinguang,GUO Jin,HE Luxi,et al.Numerical Simulation and Verification of Heat Transfer during High-Temperature Heat Treatment of Eucalyptus Wood[J].Chinese Journal of Wood Science and Technology,2023,37(01):48-54.
耿金光,郭晋,何露茜等.桉木高温热处理传热过程的数值模拟与验证[J].木材科学与技术,2023,37(01):48-54. DOI： 10.12326/j.2096-9694.2022125.

GENG Jinguang,GUO Jin,HE Luxi,et al.Numerical Simulation and Verification of Heat Transfer during High-Temperature Heat Treatment of Eucalyptus Wood[J].Chinese Journal of Wood Science and Technology,2023,37(01):48-54. DOI： 10.12326/j.2096-9694.2022125.

摘要

以一步升温、分段升温两种升温方式对20 mm厚巨尾桉（,Eucalyptus grandis×E.urophylla,）板材分别进行140、160和180 ℃的高温热处理，分析升温条件对木材温度变化的影响；并采用数值模拟方法求解桉木高温热处理升温过程的三维传热模型，研究其瞬态传热特性，同时对桉木内部温度分布进行预测。结果表明：在高温热处理升温过程中，较低目标温度以及分段升温方式更有助于缩小木材内部的温度梯度。试验验证了数值模拟结果的准确性（误差小于3.0%），构建的传热模型可用来预测试验条件下任意时刻桉木的中心层温度，为高温热处理工艺的优化提供依据。

Abstract

Eucalyptus grandis × E.urophylla, boards with 20 mm-thickness were heat-treated under high temperatures of 140 ℃, 160 ℃, and 180 ℃ respectively. Two heating methods were used, including one-step heating and segmented heating. The effect of heating conditions on the temperature change in wood was analyzed. The numerical simulation method was used to construct a three-dimensional heat transfer model for eucalyptus wood during the high temperature heat treatment to investigate its transient heat transfer characteristics and predict the internal temperature distribution. The results showed that a lower target temperature and a segmented heating method could reduce the internal temperature gradient of the wood during the high temperature heat treatment. The accuracy of the numerical simulation results (error,<,3.0%) was verified by experiment data. The model can predict the central temperature of eucalyptus wood at any time. Thus it provides a basis for the optimization of the high temperature heat treatment process.

关键词

桉木高温热处理传热温度梯度数值模拟

Keywords

Eucalyptus woodhigh temperature heat treatmentheat transfertemperature gradientnumerical simulation

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