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首页> 外文会议>Fluids Engineering Conference >EFFECT OF TIP CLEARANCE ON THE FLOW AND PERFORMANCE OF A CENTRIGUGAL COMPRESSOR
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EFFECT OF TIP CLEARANCE ON THE FLOW AND PERFORMANCE OF A CENTRIGUGAL COMPRESSOR

机译：尖端间隙对离心压缩机流动和性能的影响

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摘要

To see the tip clearance effect on a centrifugal compressor, time-resolved flow measurements were carried out at the discharge of a centrifugal compressor impeller, which is 30 deg back swept from radial and operated at the blade tip speed of 260 ms. Tested were six cases of tip clearance ratio ranged from 0.06 to 0.21. A fast response aerodynamic probe equipped with a single pressure sensor was used for the flow measurements. From the distribution of time-resolved relative velocity, the jet-wake structure was observed. The wake downstream of the splitter blade was located in the shroud-suction corner, but that downstream of the full blade was in the mid-shroud. By increasing the tip clearance, the wake region was increased and the deficit of the relative total pressure governed the wake region, therefore, the loss was enlarged.
机译：为了了解叶尖间隙对离心式压缩机的影响，在离心式压缩机叶轮的出口进行了时间分辨流量测量，叶轮从径向向后掠过30度，并以260 ms的叶尖速度运行。测试了六例尖端间隙比，范围从0.06到0.21。配有单个压力传感器的快速响应气动探头用于流量测量。从时间分辨相对速度的分布，可以观察到喷气尾流结构。分流叶片下游的尾流位于导流罩的拐角处，而整个叶片下游的尾流位于导流罩的中间。通过增加尖端间隙，增加了尾流区域，并且相对总压力的不足控制着尾流区域，因此，损失增大了。

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