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relationship between wrap angle and blade angle

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Old   January 8, 2018, 04:34
Default relationship between wrap angle and blade angle
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wenjie wang
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I use Bladegen to generate an centrifgual impeller. when I modify the balde angel distribution (Bezier curve), the wrap angle distribution is also changed. i refer to the document and the function between the wrap angle and blade angle is tan(beta) = r*d(theta)/dm. Could anyone provide more details about the function?
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Old   April 5, 2019, 13:25
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Subodh Ranjan
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Hi there!


A bit off-topic, could you tell me how to determine the wrap angle. I have calculated the basic impeller dimensions, ie,
1. Meridional velocities at impeller inlet and exit
2. The diameter of the impeller at the inlet and exit
3. The diameter of the hub at the inlet
4. Inlet vane angle
5. Outlet vane angle
6. RPM and hence the peripheral velocities at the inlet and outlet

How do I calculate the wrap angle now?
I'm using BladeGen to generate the impeller but I cannot accurate do it unless I have this
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