Influence of deflector height on condensing air flux of high-speed train air conditioner

LI Xueliang; WU Fan; WANG Tiantian; TAO Yu; XU Renze

doi:10.7638/kqdlxxb-2021.0269

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Influence of deflector height on condensing air flux of high-speed train air conditioner

更新时间：2026-05-28

- Influence of deflector height on condensing air flux of high-speed train air conditioner
- Vol. 40, Issue 6, Pages: 155-162(2022)
- 作者机构：
  
  1. 中国空气动力研究与发展中心空气动力学国家重点实验室,绵阳,621000
  2. 中南大学交通运输工程学院,长沙,410075
  3. 轨道交通安全关键技术国际合作联合实验室,长沙,410075
- 作者简介：
- 基金信息：
- DOI：10.7638/kqdlxxb-2021.0269
  CLC： U270.1
- Published：2022
- 稿件说明：
移动端阅览
李雪亮, 伍钒, 王田天, 等. 列车空调出风口导流板高度对冷凝风量影响研究[J]. 空气动力学学报, 2022, 40(6): 155−162.

LI Xueliang, WU Fan, WANG Tiantian, et al. Influence of deflector height on condensing air flux of high-speed train air conditioner[J]. 2022, 40(6): 155-162.
李雪亮, 伍钒, 王田天, 等. 列车空调出风口导流板高度对冷凝风量影响研究[J]. 空气动力学学报, 2022, 40(6): 155−162. DOI： 10.7638/kqdlxxb-2021.0269

LI Xueliang, WU Fan, WANG Tiantian, et al. Influence of deflector height on condensing air flux of high-speed train air conditioner[J]. 2022, 40(6): 155-162. DOI： 10.7638/kqdlxxb-2021.0269.

摘要

高速列车运行过程中空调系统冷凝风量会出现下降趋势，导致空调散热困难甚至停机。基于三维非定常不可压缩雷诺时均N-S方程，采用

k-ε

湍流模型和DDES方法，研究导流板高度对冷凝风量的优化效果，同时分析了不同导流板高度下阻力的变化规律。研究结果表明：在出风口外侧安装锲状导流板对缓解冷凝风量随车速快速下降的情况有显著效果。导流板通过改变出风口处流动结构，扬起车侧的高速气流形成负压区，达到缓解风量下降的目的。导流板高度直接决定了冷凝风量的大小，导流板越高，冷凝风量越大，但同时也会带来阻力增加的问题。综合考虑，导流板高度取45 mm即可有效改善冷凝风量下降的问题，同时阻力增幅相对较小。

Abstract

During the operation of high-speed trains

the condensing air flux of the air-conditioning system can decrease sharply

which leads to the cooling efficiency decreasing of the air-conditioning system

and sometimes even the system shutdown due to the overheating issue. In this study

the condensing air flux under different deflector heights were investigated using the three-dimensional unsteady incompressible Reynolds-Averaged Navier-Stokes equations together with the

k-ε

turbulence model and the DDES method. In the meantime

the resistance variation under different deflector heights were analyzed. The results show that the deflectors installed outside the condensing outlet have a significant effect

on alleviating the rapid decrease of condensing air flux with the increase of the train speed. By changing the flow structure outside the condensing outlet

the deflector induces high-speed flow on the side of the train to form an area of negative pressure so as to alleviate the decrease of the air flux. The height of the deflector directly determines the condensing air flux

with higher deflector generating larger condensing air flux but also higher resistance. Overall

a 45 mm high deflector can effectively improve the condensation air flux decreasing situation while induce relatively small amount of resistance.

关键词

Keywords

references

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