【摘要】 大空间分层空调送风气流属于高Re数非等温浮力流,常用的双方程模型不能较好地解决非等温气流流动时温差引起的浮力作用。为此在控制方程中添加浮力源项并进行Boussinesq假设,建立对浮力项经过修正的高雷诺数双方程数学模型。以淮北市中心体育馆分层空调气流温度实测数据为基础,对实际工况下的气流组织进行数值模拟。测试与模拟结果对比表明,所建立的数学模型以及边界条件的简化措施对高大场所气流温度场的模拟解算有良好的适用性,模型对预测高大空间分层空调系统设计的效果具有指导意义。更多还原

【Abstract】 The air supply flow of stratified air conditioning in large space belongs to high Reynolds number non-isothermal buoyancy flow,and the common two-equation model cannot solve the effect caused by non-isothermal buoyancy flow. For this reason,the high Reynolds two-equation mathematical model modified with buoyancy was established by adding buoyancy source to the governing equation and proposing the Boussinesq hypothesis. Based on the measured air flow temperature of stratified air conditioning in Huaibei gymnasium,the numerical simulation was carried out with establishing model in operation condition. The comparison of the numerical results with experimental data showed the former mathematical model and the way of dealing with boundary conditions had strong applicability on calculating this kind of airflow; meanwhile mathematical model had guiding significance for forecasting effects on the design of the large space stratified air conditioning system.更多还原