The static pressure gradient in cyclone air classifier can have influence on the test and measurement for its flow fields by five-hole probe.

用五孔探针测试旋流式气力分级机流场时，分级机内存在的静压梯度会对测试产生影响。

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Furthermore, the total pressure along the flow direction reduces gradually, and the corresponding static pressure increases with small gradient, the maximum value occurs at the end of FADS.

沿着流动方向，空气全压均逐渐减小，静压则逐渐增大，但增幅不大，末端处静压复得现象较为明显。

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