Why thrust decreases then increases with velocity?

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SUMMARY

The discussion centers on the behavior of thrust in relation to velocity, specifically addressing the phenomenon where net thrust decreases and then increases. Key concepts include pressure thrust and momentum thrust, with momentum thrust increasing as mass flow rises with velocity. The conversation highlights the need for clarity on the type of thrust being analyzed, whether from a jet engine or fluid dynamics. Understanding these dynamics is crucial for accurate analysis of thrust performance.

PREREQUISITES
  • Understanding of jet engine mechanics
  • Familiarity with fluid dynamics principles
  • Knowledge of thrust generation concepts
  • Basic grasp of pressure and momentum thrust definitions
NEXT STEPS
  • Research the principles of jet engine thrust generation
  • Study the relationship between mass flow and momentum thrust
  • Explore fluid dynamics related to pressure thrust
  • Examine case studies of thrust behavior at varying velocities
USEFUL FOR

Aerospace engineers, fluid dynamics researchers, and students studying propulsion systems will benefit from this discussion.

dale_8888
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Hello,

I was trying to find out why net thrust decreases then increases with velocity. I recall there is pressure and momentum thrust, however I can not recall why one of them falls away and the other increases.

Is momentum thrust the one that picks up as the mass flow increases with increased velocity?
 
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I'm afraid you will have to give more information. What "thrust" are you talking about? Is this a jet engine or a fluid leaving a source under pressure?
 

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