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首页> 外文会议>American Society of Mechanical Engineers(ASME) Turbo Expo vol.5 pt.A; 20040614-17; Vienna(AT) >INFLUENCE OF SURFACE ROUGHNESS ON THREE-DIMENSIONAL SEPARATION IN AXIAL COMPRESSORS
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INFLUENCE OF SURFACE ROUGHNESS ON THREE-DIMENSIONAL SEPARATION IN AXIAL COMPRESSORS

机译：表面粗糙度对轴流压气机三维分离的影响

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摘要

Surface roughness on a stator blade was found to have a major effect on the three-dimensional (3D) separation at the hub of a single-stage low-speed axial compressor. The change in the separation with roughness worsened performance of the stage. A preliminary study was carried out to ascertain which part of the stator suction surface and at what operating condition the flow is most sensitive to roughness. The results show that stage performance is extremely sensitive to surface roughness around the leading edge and peak-suction regions, particularly for flow rates corresponding to design and lower values. Surface flow visualization and exit loss measurements show that the size of the separation, in terms of spanwise and chordwise extent, is increased with roughness present. Roughness produced the large 3D separation at design flow coefficient that is found for smooth blades nearer to stall. A simple model to simulate the effect of roughness was developed and, when included in a 3D Navier-Stokes calculation method, was shown to give good qualitative agreement with measurements.
机译：发现定子叶片上的表面粗糙度对单级低速轴向压缩机的轮毂处的三维（3D）分离有重大影响。分离度随粗糙度的变化会降低平台的性能。进行了初步研究，以确定定子吸力表面的哪个部分以及在什么工况下流量对粗糙度最敏感。结果表明，载物台性能对前缘和峰吸区域周围的表面粗糙度极为敏感，特别是对于对应于设计和较低值的流速。表面流的可视化和出口损失测量表明，在存在跨度和弦向范围的情况下，分离的大小随粗糙度的增加而增加。粗糙度在设计流量系数下产生了较大的3D分离，这对于较接近失速的光滑叶片而言是发现的。开发了一个简单的模型来模拟粗糙度的影响，并将其包含在3D Navier-Stokes计算方法中，表明与测量值具有良好的定性一致性。

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