How is the lift formula in aerodynamics derived?

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Discussion Overview

The discussion centers around the derivation of the lift formula in aerodynamics, specifically the equation F = Lift coefficient x area x air density x velocity squared. Participants explore the origins and implications of this formula, touching on empirical data and theoretical frameworks.

Discussion Character

  • Exploratory, Technical explanation, Conceptual clarification

Main Points Raised

  • One participant requests an explanation of how the lift formula is derived, indicating a need for clarity on the topic.
  • Another participant suggests that the lift coefficient is determined through empirical data and emphasizes that the formula is not a robust physical equation, implying that more complex models exist for lift and drag.
  • A third participant briefly mentions Buckingham's Pi Theorem, hinting at a theoretical approach to understanding the formula's derivation.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the derivation of the lift formula, with differing views on its empirical nature and the complexity of underlying theories.

Contextual Notes

The discussion lacks detailed mathematical derivations and does not clarify the assumptions behind the lift coefficient or the conditions under which the formula applies.

ykobe23
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I'm currently doing the IB (equivalent to A levels) and we have to do a research on a subject and i took aerodynamics, specifically lift and can someone explain to me how the lift formula(F= Lift coeffecient x area x air density x velocity squared ) is found ?

Thank you very much
 
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It is found simply through empirical data. The lift coefficient is a proportionality constant that has to be found experimentally, numerically or, rarely, analytically. It isn't a robust physical formula. The more physical formulae for lift and drag are much more complicated.
 
ykobe23 said:
(F= Lift coeffecient x area x air density x velocity squared ) is found ?

Thank you very much

Search for Buckingham's Pi Theorem.
 
thanks very much !
 

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