| 摘要: |
| 通过数值模拟对空调柜机风道的三维流场进行计算，并对三种多翼离心风机的集流器结构进行对比研究。数值模拟结果显示：相比于原机型自带的收敛型集流器，轴向高度矮于原?机型的收敛型集流器和进口倾斜角度相比原?机型减小的新型线收敛型集流器都可以提高叶轮对气流的利用率，蜗壳出口侧的集流器背部的漩涡减小，风量分别增加6.8%和4.2%。通过实验对数值模拟结果进行了验证，实验结果显示两种方案对整机循?环风量都有所提高，风量分别增加4.7%和3%，噪音值不变。 |
| 关键词: 热工学；数值模拟 空调；集流器；多翼离心风机 |
| DOI： |
| Received:September 26, 2011 |
| 基金项目: |
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| Optimization Study of Bell Mouth on Multi-blade Centrifugal Fan used in Floor Standing Air-conditioner |
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| Abstract: |
| Numerical study of three-dimensional flow field was carried out for the duct system of the floor standing air-conditioner. Comparative study on three types of structure of bell mouth used in the multi-blade centrifugal fan was implemented. Calculation results show that, both the first type of bell mouths with the inward inlet whose axial height is larger than the existing type and the second type of bell mouth with new mold line inward inlet and smaller slope angle than the existing type can improve airflow utilization ratio and reduce the vortex in the back of volute exit compared to the existing type, and the air volume is increased by 6.8% and 4.2% respectively. The experiment was carried out to validate the result of simulation and the experimental results show that the air volume can increase by 4.7% and 3% respectively while the level of noise is invariant. |
| Key words: pyrology numerical simulation air-conditioner bell mouth multi- multi-blade centrifugal |
