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通过实验与数值模拟,以水为工作介质,在直径D=0.5 m的内盘管加热搅拌釜中对双层正交排列的改进型INTER-MIG浆搅拌器不同转速下的温度场、盘管外侧的温度边界层及传热系数进行研究.结果表明,实验与数值模拟的温度误差在2 K以内;搅拌釜内温度从上到下、从内到外呈升高趋势,最大温差基本保持在1 K之内;根据实验数据拟合得盘管外侧传热系数的关联式为Nu=0.0337Re0.925Pr1/3(d/D)0.1(dco/D)0.5,计算与实测值的平均偏差为7.64%;盘管外侧温度边界层平均厚度为3.66 mm,在合理范围内.
Through experiments and numerical simulations, the temperature field at different rotation speeds of the modified INTER-MIG pulp mixer with double layers orthogonal arrangement was studied in the inner coil heating stirred tank with diameter D = 0.5 m using water as the working medium. The temperature boundary layer and the heat transfer coefficient are studied.The results show that the temperature error between experiment and numerical simulation is less than 2 K. The temperature in the stirred tank increases from the inside to the outside and keeps the maximum temperature difference between 1 K; According to the experimental data, the correlation coefficient of the heat transfer coefficient outside the coil is Nu = 0.0337Re0.925Pr1 / 3 (d / D) 0.1 (dco / D) 0.5. The average deviation between calculated and measured values is 7.64%. The average temperature of the outer boundary layer of the coil was 3.66 mm, which was within a reasonable range.