Hi, I'm trying to design a reduced scale model of a turbine tested with glycerol. The prototype idea is to install a turbine in tailings flux to recover a percentaje of energy from it.
The reduced scale model will test the turbine (reduced scale) functioning with glycerol, to simulate viscosity and density of the tailings. The porpose is to get the efficiency of the turbine functioning with tailings.
I have two main questions:
1. Which parameter should I match to scale the machine ? Reynolds, tip speed ratio?
2. How can I scale the viscosity? reynolds?
I feel I need more equations to develop the similarity between Q, RPM, Viscosity, density, etc.
Here you have some information on the "similitudes" as we say in French for scaling the turbine.
It could allow you to look further with lastname of researchers that have worked with dimensionless number.
Sorry, but it is written in French.
https://michelsabourin.scenari-community.org/SimTurbTech/co/1_6Similitude_partielle.html
I hope, it can help.
Yours sincerely,
JF Antoine
1.Initially, match the runner diameter and then for the flow, match its Reynolds Number
2.Viscosity should be scaled in 1:4
I am more familiar with pump tests but a quick Google brought up this document which should provide you with all the information you need:
IEC 60193:2019
Hydraulic turbines, storage pumps and pump-turbines - Model acceptance tests
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