Magnus effect in flettner rotor

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SUMMARY

The discussion centers on the application of the Magnus effect in Flettner rotors for boats, specifically exploring the potential for vertical rotors to generate lift. Participants confirm that lift, defined as the aerodynamic force perpendicular to free-stream flow, can indeed be achieved with a properly positioned rotor. The conversation also touches on the implications of rotor placement, suggesting that positioning closer to the bow may enhance lift while considering the risk of overpowering the rotor, which could lead to undesirable downforce. The Kutta–Joukowski theorem is referenced as a foundational concept in understanding the lift generated by rotating cylinders.

PREREQUISITES
  • Understanding of the Magnus effect and its applications in fluid dynamics.
  • Familiarity with the Kutta–Joukowski theorem as it relates to lift generation.
  • Basic knowledge of aerodynamic principles, particularly lift and downforce.
  • Experience with Flettner rotors and their design considerations in marine applications.
NEXT STEPS
  • Research the design and optimization of Flettner rotors for marine vessels.
  • Explore advanced aerodynamic principles related to lift and drag in rotating systems.
  • Investigate the impact of rotor placement on sailing efficiency and performance.
  • Learn about the practical applications of the Magnus effect in other fields, such as sports and aviation.
USEFUL FOR

Marine engineers, naval architects, and anyone interested in optimizing sailing performance through innovative rotor designs and aerodynamic principles.

Mr lee
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Mr lee said: ↑
hi -new but enjoyed years, wit and wisdom
Flettner rotor on a boat - ie. magnus effect

Can the vertical rotor create lift?

a curve balls 'laces' exaggerate and bend the magnus effect.
can you replicate this effect on a rotor?
--perhaps to enable another direction of force-- up
optimally I would like to gain lift -to the vertical -reduce downforce
I understand Kutta–Joukowski as it applies to a cylinder.

horizontal rotor?--unknown omidirectional sailing efficiency
ground effect used as a factor?
 
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oop
sorry,meant to say thank you
 
Mr lee said:
oop
sorry,meant to say thank you
my purpose for asking is ;where to put the rotor?
a conventional sail creates lift, so is mounted nearer the bow
 
Mr lee said:
my purpose for asking is ;where to put the rotor?
a conventional sail creates lift, so is mounted nearer the bow
I;m afraid, if the rotor becomes overpowered, it will drive the bow(s) under
 
Mr lee said:
Flettner rotor on a boat - ie. magnus effect

Can the vertical rotor create lift?
Yes, lift is the aerodynamic force component perpendicular to the free-stream flow.
 
awesome, just what was needed. thank you
 

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