风道结构对地板下送风型数据中心气流组织的影响（1）数值设计
Effect of Air Duct Layout on Airflow in Data Center Using Under-floor Air Distribution (1) Numerical Design

本文以排布奇数列机柜冷通道封闭的数据中心子模块为研究对象（3列机柜为例），采用CFD模拟将静压层高度与地板穿孔率对数据中心气流组织的联合影响进行可视化，并分析了两种参数组合的25个典型模型的温度场，选出最佳静压层高度与地板穿孔率的范围分别为600~700 mm，20%~50%。对比了最佳静压层高度与地板穿孔率组合范围内的8个数据中心气流组织模型，选出机柜内部温度分布较均匀的气流组织模型。在此基础上，在静压层内架设挡板，并在﹣15°~45°的挡板角度中选择最佳角度以获得最优冷却效果。结果表明：静压层高度为600 mm，穿孔地板穿孔率为20%，设置15°挡板的数据中心子模块为最优模型。
A sub-module (three-row cabinet as an example) of data center with the cold channel closed in an array of odd-numbered columns is taken as the subject to be investigated. A computational fluid dynamics simulation was used to visualize the compound effect of the plenum height and floor perforation rate on the airflow in the data center. The temperature fields of 25 typical models with various combinations of plenum heights and floor perforation rates were analyzed to find the best match of 600-700 mm (plenum height) and 20%–50% (perforation rate). Furthermore, eight plenum height and perforation rate models that fell within the above range were compared to find the best uniform temperature distribution inside the cabinets. Based on the results, a baffle was erected in the plenum at four angles from -15° to 45° to obtain the most satisfying cooling effect. The results showed that the optimal model for the data center sub-module had a plenum height of 600 mm, perforation rate of 20%, and 15° baffle