Forces on the top of a bullet train

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SUMMARY

The discussion focuses on the air resistance experienced on the top of a bullet train at maximum speed, specifically addressing skin friction as a component of parasitic drag. Participants emphasize the importance of understanding both skin friction and overall drag forces when analyzing aerodynamic performance. The conversation suggests that calculating drag for the roof alone may not provide comprehensive insights, but offers assistance for those attempting the calculation.

PREREQUISITES
  • Understanding of aerodynamic principles, particularly drag forces.
  • Familiarity with skin friction and its role in parasitic drag.
  • Basic knowledge of bullet train design and operation.
  • Experience with fluid dynamics concepts.
NEXT STEPS
  • Research the calculation methods for skin friction on surfaces, particularly in high-speed applications.
  • Explore the principles of parasitic drag and its impact on train efficiency.
  • Learn about aerodynamic optimization techniques for high-speed trains.
  • Investigate the effects of different materials on skin friction and overall drag.
USEFUL FOR

Engineers, physicists, and transportation designers interested in the aerodynamic performance of high-speed trains and the factors affecting their efficiency.

cbram
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Can anyone tell me what is the air resistance on the top of a bullet train when it is moving at top speed
 
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There will be skin friction on the roof surface of the train:

http://en.wikipedia.org/wiki/Parasitic_drag#Skin_friction

Is that what you are interested in? I can't see the use of calculating drag for the roof alone... Though, If you make an attempt we can help you solve the problem.
 

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