| 摘要: |
| 通过对 6种起旋器、4种流量工况的试验 ,对起旋器出口断面流速分布及起旋效率进行了分析。结果表明 ,起旋器出口断面轴向流速分布呈类对数型分布 ,它比平直流的流速分布更均匀 ,可以用平直流速分布公式与一个二次尾流函数来表示 ;起旋器出口断面周向流速分布在主流区近似呈线性分布。提出了起旋器的起旋效率计算式 ,公式表明要提高起旋效率 ,则必须减小阻力损失 ,即应对起旋器结构参数进行优化。 |
| 关键词: 起旋器,流速分布,起旋效率 |
| DOI： |
| 分类号:TV13 |
| 基金项目:山西省自然科学基金资助项目(971038)，国家自然科学基金资助项目(59779009) |
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| Outlet cross section velocity distribution and rotation efficiency of spiral pipe flow generator |
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SUN Xi huan 1 WANG Wen yan 1 WU Peng lin 2 ZHANG Yu 2 LAN Ya mei 2 PENG Long sheng 2
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| Abstract: |
| The cross section axial velocity distribution at outlet and rotation efficiency of the spiral flow generator are analyzed in this paper,based on the experiment data of 6 spiral flow generators at 4 flow rates.The cross section axial velocity distribution at outlet of the spiral flow generator is a logrithm like function,which can be expressed by a velocity distribution fomula of 2-D pipe flow and secondary wake flow function,and more uniform than that of 2-D pipe flow.The cross section circumfential velocity distribution at outlet of the spiral flow generator is a liner function.The rotation efficiency fomula is then suggested.In order to raise the rotation efficiency of spiral flow generator,its resistance must be reduced by optimizing its structure parameters. |
| Key words: spiral pipe flow generator,velocity distribution,rotation efficiency |
