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首页> 外文期刊>JSME International Journal. Series B, Fluids and Thermal Engineering >Unsteady Pressure Measurements around Rotor of an Axial Flow Fan under Stable and Unstable Operating Conditions
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Unsteady Pressure Measurements around Rotor of an Axial Flow Fan under Stable and Unstable Operating Conditions

机译：在稳定和不稳定的工作条件下，轴流风扇转子周围的非定常压力测量

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摘要

This study presents some measurement results on the unsteady pressure fields around rotor under stable and unstable operating conditions of an axial flow fan. The unsteady static pressure of rotor passage was measured by using high frequency pressure transducers mounted on the casing wall. The measurements on the unsteady total pressure at rotor inlet and outlet were also conducted with specially designed high frequency total pressure probe. Double Phase-Locked Ensemble Averaging Technique was used for analysis of pressure fluctuations around the rotor at rotating stall onset point. From the results, the unsteady pressure fields during stable and unstable operations of the axial fan were investigated and compared with each other. Particularly one period of rotating stall could be divided into two regions, stalled flow and unstalled flow region respectively. Furthermore the former could be also classified into two zones, bubbled and disturbed region by their features. The flow characteristics for each zone were described in detail and the static and total pressure fields were also analyzed in terms of the pressure distribution along pressure side and suction side on the blade tip profile.
机译：这项研究给出了在轴流风机稳定和不稳定运行条件下转子周围非定常压力场的一些测量结果。通过使用安装在机壳壁上的高频压力传感器测量转子通道的不稳定静压力。还使用专门设计的高频总压探头对转子入口和出口处的不稳定总压进行了测量。双锁相平均技术用于分析旋转失速开始点处转子周围的压力波动。根据结果​​，研究并比较了轴流风扇稳定和不稳定运行期间的非稳态压力场。特别地，旋转失速的一个时期可以被分为两个区域，分别是失速流动和非流动流动区域。此外，前者还可以根据其特征分为两个区域，即起泡区域和受扰区域。详细介绍了每个区域的流动特性，并且还根据叶片尖端轮廓上沿压力侧和吸力侧的压力分布分析了静态和总压力场。

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