Air-side Structural Optimization for Wasp Waist Radiator of Aluminum
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摘要: 为寻找一种与收腰管匹配效果更好的散热翅片结构,先应用正交试验与模拟仿真对收腰管百叶窗散热器翅片的4个主要结构参数,即翅片间距Fp、百叶窗间距Lp、百叶窗宽度Lw和百叶窗角度La进行优化,得到各结构参数对散热器传热性能和压降性能的影响规律,即百叶窗角度La影响最大,翅片间距Lp影响最小。随后,在此基础上提出了散热翅片的优化方案。最后,利用风洞试验对优化前后的散热器性能进行了比较。结果显示,优化后的百叶窗翅片结构可以明显提高散热器空气侧的传热,同时降低了风阻。Abstract: In order to find a heat fin which matches well to the waist tube, the four main structural parameters including fin spacing(Fp), louver spacing(Lp), louver width(Lw) and louver angle(La), are optimized by using the orthogonal test and simulation. Then the influence of the each structural parameter on the heat transfer and pressure drop performance of radiator is obtained. It is found that the louver angle has the greatest influence on the performance of radiator, while the louver spaceing has the smallest influence. Based on the above results, the improved design structure is put forward. Finally, the wind tunnel experiments are carried out to compare the wasp waist tube radiator with the optimized radiator. The results show that the optimal louvered fin structure can obviously improve the air-side heat transfer and reduce the pressure drop.
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Key words:
- wasp waist radiator /
- heat transfer /
- orthogonal test /
- structural optimization
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表 1 结构参数水平设计表
参数名 水平 1 2 3 翅片间距Fp/mm 2 2.26 2.52 百叶窗间距Lp/mm 1.1 1.3 1.5 百叶窗宽度Lw/mm 3.58 3.78 3.98 百叶窗角度La/(°) 23 25 27 表 2 结构参数水平设计表
模型编号 Fp/mm Lp/mm Lw/mm La/(°) 1 2 1.1 3.58 23 2 2 1.3 3.78 25 3 2 1.5 3.98 27 4 2.26 1.1 3.78 27 5 2.26 1.3 3.98 23 6 2.26 1.5 3.58 25 7 2.52 1.1 3.98 25 8 2.52 1.3 3.58 27 9 2.52 1.5 3.78 23 表 3 入口风速为2 m/s正交试验结果分析表
模型编号 Fp/mm Lp/mm Lw/mm La/(°) 传热系数h/(W·(m2·K)-1) 压降ΔP/Pa 综合因子c/(W·(m2·K·Pa)-1) 1 2 1.1 3.58 23 56.0 30.7 1.82 2 2 1.3 3.78 25 41.2 32.4 1.28 3 2 1.5 3.98 27 52.0 41.1 1.27 4 2.26 1.1 3.78 27 24.5 34.7 0.71 5 2.26 1.3 3.98 23 44.2 29.0 1.52 6 2.26 1.5 3.58 25 51.6 37.5 1.38 7 2.52 1.1 3.98 25 47.7 28.8 1.66 8 2.52 1.3 3.58 27 49.6 31.2 1.59 9 2.52 1.5 3.78 23 50.1 28.5 1.76 AVc1 1.46 1.40 1.60 1.7 AVc2 1.2 1.46 1.25 1.44 AVc3 1.67 1.47 1.48 1.19 R 0.47 0.07 0.35 0.51 最优参数 Fp3 Lp3 Lw1 La1 表 4 不同入口风速下的正交试验分析表
风速/(m·s-1) 名称 Fp Lp Lw La 2 R 0.47 0.07 0.35 0.51 最优参数 Fp3 Lp3 Lw1 La1 4 R 0.34 0.12 0.23 0.36 最优参数 Fp3 Lp1 Lw1 La2 6 R 0.22 0.08 0.11 0.24 最优参数 Fp3 Lp3 Lw1 La1 8 R 0.21 0.04 0.07 0.23 最优参数 Fp3 Lp3 Lw1 La1 10 R 0.143 0.06 0.08 0.140 最优参数 Fp3 Lp3 Lw1 La1 12 R 0.07 0.01 0.09 0.1 最优参数 Fp3 Lp3 Lw1 La2 表 5 不同入口风速下各参数对散热器性能的影响顺序
风速/(m·s-1) 参数影响顺序 1 2 3 4 2 La Fp Lw Lp 4 La Fp Lw Lp 6 La Fp Lw Lp 8 La Fp Lw Lp 10 Fp La Lw Lp 12 La Lw Fp Lp -
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