变地域暖风机多通道空气流动数值模拟及换热性能分析

针对变地域暖风机多通道空气流动进行了数值模拟．由于数值模拟对象结构复杂、计算区域的尺寸变化大．采用非结构化网格、网格拓扑技术．解决了数值计算中遇到的困难．计算结果与实验数据基本吻合，表明数值计算所采用的数学模型、边界条件等是合理可靠的．在此基础上．计算研究了不同送风量、不同海拔高度、不同送风口位置对流量分配比及机组本体压力损失的影响规律，并分析了流量分配比与其换热能力的匹配问题．计算分析所得结果为变地域暖风机多通道空气流动及换热的合理设计提供了理论依据和基础数据．

Numerical simulation of multi-channel air flow and thermal performance in warm air unit used for different altitude zones

Numerical simulation of multi-channel air flow in warm air unit for different altitude zones has been done. As the simulation object structure is complicated and calculation region size change is large, these difficulties in the simulation can be solved with unstructured grid method and grid topology technique. The calculation results are basically consistent with experimental data, so the mathematics mode and boundary conditions etc. used in simulation have been proved with rationality and reliability. On these bases, the rule of multi-channel flux ratio and the unit pressure drop have been researched and determined on the cases of different air supply volumes, altitudes and air supply opening positions. The matching of multi-channel flux ratio and its heat exchange have also been discussed. The theory and basic data related to the multi-channel air flow and heat exchange in the unit have been supplied for the unit's rational design.