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用零方程湍流模型模拟通风空调室内的空气流动
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Simulation of indoor air flow in ventilated room by zero-equation turbulence model
摘要：利用带浮升力效应的k-ε湍流模型和一个新零方程湍流模型对某房间内空气的混合对流流动进行了数值模拟，通过比较发现，新零方程湍流模型与实验数据吻合得更好，且可以很快获得收敛解。利用新零方程湍流模型对房间内的等温流动、非等温流动进行了模拟，发现数值计算结果和相应实验数据吻合得很好。由此考察和验证了新模型对暖通空调领域中流动和传热问题的实用性和可靠性，可以利用该模型快速、精确地设计和分析暖通空调领域中的室内空气流动问题。
关键词：室内空气流动；数值模拟；湍流模型；零方程
Abstract Mixed convection flow in a ventilated room was simulated using the k-ε model and a new zero-equation turbulence model. Comparison of the numerical results and the measured data showed that the new zero-equation turbulence model gives more satisfactory results in shorter time. The isothermal and non-isothermal airflow in an air-conditioned room were then simulated with the zero-equation turbulence model. The simulated results agreed well with the experiments. Therefore, the new zero-equation turbulence model is recommended for heating, ventilating and air conditioning industry because it is quick and so efficiently accurate for engineering studies.
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