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Impeller Eye Diameter vs Inlet eye Diameter

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Rasoul1250

Mechanical
Apr 8, 2015
7
Hi all
According to "Impeller eye cavitation damage of sundyne Bulletin", the cavitation damage appears due to overly large inlet eye diameter to impeller tip diameter ratio.
1- what is the eye diameter exactly?! is it inducer diameter?
2- what is the red line in the attached picture?
3-what is the effects of any changes such as enlarging and reducing of this diameter on the cavitation?

 
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