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对旋风机转速改变对其气动特性的影响

孙文龙 方祥军

孙文龙, 方祥军. 对旋风机转速改变对其气动特性的影响[J]. 北京航空航天大学学报, 2017, 43(12): 2480-2487. doi: 10.13700/j.bh.1001-5965.2017.0169
引用本文: 孙文龙, 方祥军. 对旋风机转速改变对其气动特性的影响[J]. 北京航空航天大学学报, 2017, 43(12): 2480-2487. doi: 10.13700/j.bh.1001-5965.2017.0169
SUN Wenlong, FANG Xiangjun. Influence of rotating speed variation on aerodynamic characteristics for counter rotating fan[J]. Journal of Beijing University of Aeronautics and Astronautics, 2017, 43(12): 2480-2487. doi: 10.13700/j.bh.1001-5965.2017.0169(in Chinese)
Citation: SUN Wenlong, FANG Xiangjun. Influence of rotating speed variation on aerodynamic characteristics for counter rotating fan[J]. Journal of Beijing University of Aeronautics and Astronautics, 2017, 43(12): 2480-2487. doi: 10.13700/j.bh.1001-5965.2017.0169(in Chinese)

对旋风机转速改变对其气动特性的影响

doi: 10.13700/j.bh.1001-5965.2017.0169
详细信息
    作者简介:

    孙文龙 男, 博士研究生。主要研究方向:气动计算和涡轮实验

    方祥军 男, 博士, 副教授, 高级工程师。主要研究方向:涡轮压气机设计、数值模拟和实验

    通讯作者:

    方祥军,E-mail: 185352895@qq.com

  • 中图分类号: V211.3;O354

Influence of rotating speed variation on aerodynamic characteristics for counter rotating fan

More Information
  • 摘要:

    对旋风机前后级转速比对风机气动特性影响较大,合适的转速比有利于提高对旋风机气动性能。采用数值计算和实验模拟方法研究对旋风机前后两级叶轮转速改变对风机气动特性的影响。首先,通过速度三角形定量分析转速改变对风机功率和内部流动参数的影响。之后,数值计算的结果与实验进行对比,分析基准转速下风机整体性能的变化。最后,通过数值计算结果对风机内部气体的流动进行具体分析,发现在保持进口条件不变的条件下,前后两级叶轮转速改变相同百分比时,第1级转速改变可以更加有效的改变风机的流动参数和性能,综合比较整体性能变化与实际应用确定了最优转速比为1.1:1,此转速比下传动效率为88.4%时对旋风机效率为75%。

     

  • 图 1  对旋风机的基本结构及测点分布

    Figure 1.  Fundamental structure of counter rotating fan and distribution of measuring points

    图 2  对旋风机的叶片几何

    Figure 2.  Blade geometry of counter rotating fan

    图 3  计算网格

    Figure 3.  Computational grid

    图 4  对旋式轴流风机基元级速度三角形变化示意图

    Figure 4.  Sketch map of velocity triangle in elementary stage for counter rotating axial flow fan

    图 5  转速3 000-3 000计算总压升和总功率与实验对比

    Figure 5.  Comparison of calculated and measured total pressurerise and total power under rotating speed 3 000-3 000

    图 6  不同转速下50%叶高处静压云图

    Figure 6.  Contours of static pressure on middle section under different rotating speeds

    图 7  不同转速下50%叶高处流线图

    Figure 7.  Streamlines on middle section under different rotating speeds

    图 8  风机质量流量、总压升随转速变化曲线

    Figure 8.  Curves of mass flow rate and total pressure rise of fan with change of rotating speed

    图 9  风机第1、2级总压升随转速变化曲线

    Figure 9.  Curves of total pressure rise of first and second stages of fan with change of rotating speed

    图 10  风机总功率随转速变化曲线

    Figure 10.  Curves of total power of fan with change of rotating speed

    图 11  风机第1、2级轴功率随转速变化曲线

    Figure 11.  Curves of shaft power of first and second stages with change of rotating speed

    图 12  风机效率随转速变化曲线

    Figure 12.  Curves of fan efficiency with change of rotating speed

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出版历程
  • 收稿日期:  2017-03-21
  • 录用日期:  2017-05-12
  • 网络出版日期:  2017-12-20

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