用湍流传热模型模拟室内空气流动和换热

Modelling indoor air flow and heat transfer with turbulent heat transfer model

利用低雷诺数NH模型、NK传热模型及模型系数改进后的NK传热模型,分别对室内空气流动和换热的速度场、温度场、湍动能场进行了模拟,并将计算结果与实验结果进行了对比分析。研究表明,低雷诺数NH模型、NK传热模型及模型系数改进后的NK传热模型均能对室内空气流动及换热的速度场、温度场、湍动能场进行较好的数值模拟,其中模型系数改进后的NK传热模型模拟的准确性最高。

<Abstrcat> The turbulent heat transfer model has been introduced to the numerical study on indoor air flow and heat transfer to improve the accuracy of simulation for the first time. The distributions of velocity, temperature and turbulent kinetic energy on indoor turbulent air flow and heat transfer with three kinds of models——low-Reynolds-number NH model, NK heat transfer model and improved NK heat transfer model have been simulated and compared with the experimental data. The simulation results have shown that improved NK heat transfer model has the best performance in three kinds of models, and the distributions of velocity, temperature and turbulent kinetic energy agree well with the experimental data.