Savonius rotor simulation in matlab/simulink

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  • Thread starter Thread starter Yogi@1989
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    Rotor Simulation
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Discussion Overview

The discussion focuses on simulating a Savonius rotor in MATLAB/Simulink, addressing challenges in modeling and obtaining accurate results for angular velocity and position. Participants share their progress, code, and seek assistance with specific issues related to the simulation.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested
  • Homework-related

Main Points Raised

  • One participant has derived equations for torque and implemented MATLAB code, but is struggling with integrating torque to obtain angular velocity and position.
  • Another participant expresses skepticism about the efficiency of the Savonius rotor, suggesting that correct modeling may lead to doubts about its practicality.
  • A participant requests the Simulink model from another user, indicating a need for shared resources.
  • Another user discusses their success with simulating a Darrieus rotor but expresses difficulty in finding a model for the Savonius rotor and requests help.
  • There is a question regarding the calculation of the Coefficient of Power (Cp) in the simulations, specifically whether wind speed is kept constant or varied during calculations.

Areas of Agreement / Disagreement

Participants express varying levels of success with their simulations, with some focusing on the Savonius rotor while others have successfully modeled the Darrieus rotor. There is no consensus on the best approach to modeling the Savonius rotor, and multiple viewpoints on its efficiency and modeling challenges are present.

Contextual Notes

Some participants have not provided their equations or complete code, which may limit the ability to assist effectively. The discussion includes unresolved questions about modeling techniques and assumptions regarding wind speed in simulations.

Who May Find This Useful

This discussion may be useful for individuals interested in wind turbine design, specifically those working with Savonius and Darrieus rotor simulations in MATLAB/Simulink.

Yogi@1989
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hi there,
i'm trying a to simulate a savonius rotor in simulink.
below is brief summary of how much i have done:-
1. derived the equations for torque.
2. MATLAB code done.
3. in simulink the equation I'm using to get the angular velocity and angular position is
T = I*aplha
the torque values are being stored in a matrix and being called in using a lookup table.

4. the torque plot seems to be fine but once integrate it to get angular velocity and angular position, the results are not what should be getting.


can someone please help me out!
 
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The Savonius Rotor is so inefficient that you may well not believe your correct results.
Correctly modelling a SR should convince you that it is not worth building one.

You have asked a specific question about a general or vague subject.
If you do not post your equations and code it will be impossible to help you.
 
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code and simulink

hi there, please find the attached MATLAB code and simulink screen shot.




View attachment Savonew.m

sim.jpg
 
can u show us the SIMULINK model please ! i need your Model...
 
Hako_Algeria said:
Hi there,
I'm trying to simulate savonius and Darrieus rotors in simulink.
below is brief summary of how much i have done:-
1. I found Darrieus model
2. Darrieus MATLAB code done.
3. the simulation was great and successful
but...
1. I couldn't find Savonius model
2. I tried with a difficult one, i couldn't simulate that
please anyone can help about this problem

thank you
I am sorry but I have no model for the Savonius Rotor.
 
Hako_Algeria said:
can u show us the SIMULINK model please ! i need your Model...
Hi Hako_Algeria,

I have already attached the Simulink model and Matlab code in the earlier message.
I also had a question for your simulation.
How are you calculating the Coefficient of Power for the model. Do you keep the wind speed constant and then calculate Cp at each tip speed ratio value OR you vary the wind speed and calculate the Cp at the maximum power at each wind speed ??
 

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