Bernoulli's Theorem

Bernoulli's theorem states that in a steady, incompressible fluid flow, an increase in fluid velocity results in a decrease in static pressure. In aviation, this explains how air accelerating over the curved upper surface of an aerofoil creates a region of lower static pressure above the wing compared to the lower surface, contributing to lift. Bernoulli's principle works in conjunction with Newton's Third Law — the reaction force from air deflected downward — to fully explain total lift production.

Key Points

• •Relates to the variation of kinetic energy (dynamic pressure) and potential energy (static pressure) within a moving fluid.
• •High-velocity airflow above a wing results in <strong>low static pressure</strong> on the upper surface.
• •Works in conjunction with Coanda theory to explain total lift production.

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