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基于仿真的小型数据中心气流组织研究

周成龙 杨春信 王超 张兴娟

周成龙, 杨春信, 王超, 等 . 基于仿真的小型数据中心气流组织研究[J]. 北京航空航天大学学报, 2018, 44(8): 1682-1692. doi: 10.13700/j.bh.1001-5965.2017.0658
引用本文: 周成龙, 杨春信, 王超, 等 . 基于仿真的小型数据中心气流组织研究[J]. 北京航空航天大学学报, 2018, 44(8): 1682-1692. doi: 10.13700/j.bh.1001-5965.2017.0658
ZHOU Chenglong, YANG Chunxin, WANG Chao, et al. Simulation-based research on airflow organization for small data center[J]. Journal of Beijing University of Aeronautics and Astronautics, 2018, 44(8): 1682-1692. doi: 10.13700/j.bh.1001-5965.2017.0658(in Chinese)
Citation: ZHOU Chenglong, YANG Chunxin, WANG Chao, et al. Simulation-based research on airflow organization for small data center[J]. Journal of Beijing University of Aeronautics and Astronautics, 2018, 44(8): 1682-1692. doi: 10.13700/j.bh.1001-5965.2017.0658(in Chinese)

基于仿真的小型数据中心气流组织研究

doi: 10.13700/j.bh.1001-5965.2017.0658
基金项目: 

国家“973”计划 2012CB720100

详细信息
    作者简介:

    周成龙  男, 博士研究生。主要研究方向:环控生保系统方案设计与气流组织研究

    杨春信  男, 博士, 教授, 博士生导师。主要研究方向:环境控制与气液两相流

    王超  女, 学士, 工程师。主要研究方向:飞行器环境控制仿真及地面模拟验证技术

    张兴娟  女, 博士, 副教授。主要研究方向:飞行器环境控制仿真及地面模拟验证技术

    通讯作者:

    杨春信, E-mail: yangchunxin@sina.com

  • 中图分类号: TB657.2

Simulation-based research on airflow organization for small data center

Funds: 

National Basic Research Program of China 2012CB720100

More Information
  • 摘要:

    为了实现小型数据中心能在办公室环境中运行而降低运行成本这一实际需求,提出了蒸汽压缩制冷系统与服务器融合封闭的降噪与制冷的一体化设计方案。在关键部件——轴流风扇和蒸发器的仿真策略得到验证的基础上,建立了系统气流组织仿真模型以分析箱体内流动与换热特征,以方差和信息熵构建不均匀性评价指标以评估不同风扇排布方式对服务器温度场均匀性的影响,讨论了发热密度增大时的应对策略。结果表明,轴流风扇不均匀的动量驱动导致了蒸发器内不均匀的流动与换热,所设计的降噪制冷系统可以使服务器的排风温度控制在21.6~22.2℃,增加蒸发器的散热风扇可以整体上改善温度场均匀性,发热密度增大时增大服务器的通风量是降低排风温度的有效措施。

     

  • 图 1  降噪制冷方案示意图

    Figure 1.  Schematic diagram of noise reduction refrigeration scheme

    图 2  降噪制冷箱结构

    Figure 2.  Configuration of noise reduction refrigeration system

    图 3  轴流风扇三维模型及计算网格

    Figure 3.  3D model and computational mesh of axial flow fan

    图 4  轴流风扇流量特性曲线对比

    Figure 4.  Comparison of flow characteristic curve of axial flow fan

    图 5  蒸发器翅片结构

    Figure 5.  Fin configuration of evaporator

    图 6  流量特性和换热特性对比

    Figure 6.  Comparison of flow characteristic and heat transfer characteristic

    图 7  xy方向的压降特性

    Figure 7.  Pressure loss characteristic of x and y direction

    图 8  制冷实验

    Figure 8.  Refrigeration experiment

    图 9  系统仿真实验验证

    Figure 9.  Validation of system experiment simulation

    图 10  待分析截面位置分布

    Figure 10.  Location distribution of sections to be analyzed

    图 11  截面y1~y6的流线-温度分布

    Figure 11.  Streamline-temperature distribution of sections y1-y6

    图 12  截面z1的速度矢量

    Figure 12.  Velocity vector in section z1

    图 13  蒸发器上表面速度分布

    Figure 13.  Velocity distribution of upper surface of evaporator

    图 14  蒸发器中线的速度与换热强度分析

    Figure 14.  Analysis of velocity and heat transfer strength in middle line of evaporator

    图 15  4种气流组织方案

    Figure 15.  Four airflow organization schemes

    图 16  4种方案截面y3的温度和速度矢量云图

    Figure 16.  Temperature and velocity vector contours of section y3 of four schemes

    图 17  4种方案蒸发器中线上的速度和换热强度

    Figure 17.  Velocity and heat transfer strength in middle line of evaporator of four schemes

    图 18  气流组织形式对排风温度的影响

    Figure 18.  Influence of airflow organization form on exhaust temperature

    图 19  4种气流组织方案的温度场不均匀性评价

    Figure 19.  Evaluation of temperature field inhomogeneity of four air flow organization schemes

    图 20  不同调节方案的排风温度

    Figure 20.  Exhaust temperature of different control schemes

    表  1  小型数据中心的性能参数

    Table  1.   Performance parameters of a small data center

    参数 数值
    刀片服务器数量 5
    噪声级/dB 75
    刀片服务器尺寸/(mm×mm×mm) 40×170×720
    单个刀片服务器发热量/W 132
    刀片服务器通风量/(m3·s-1) 0.007
    下载: 导出CSV

    表  2  轴流风扇性能参数

    Table  2.   Performance parameter of axial flow fan

    参数 数值
    尺寸/(mm×mm×mm) 150×150×51
    转速/(r·min-1) 2 800
    电压/V 220
    电流/A 0.22
    下载: 导出CSV

    表  3  网格无关性验证

    Table  3.   Grid independence verification

    网格数 流量/(m3·s-1) 相对偏差/%
    171 015 0.080 1 2.7
    301 245 0.083 1 0.9
    402 384 0.081 8 0.6
    下载: 导出CSV

    表  4  蒸发器仿真策略

    Table  4.   Simulation strategy of evaporator

    控制方程 层流模型
    流体压缩性 不可压
    压力速度耦合 SIMPLE
    动量离散格式 二阶迎风
    能量离散格式 QUICK
    下载: 导出CSV
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出版历程
  • 收稿日期:  2017-10-24
  • 录用日期:  2018-01-19
  • 刊出日期:  2018-08-20

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