What happens to a fuel's kinetic energy and the pressure it exerts when passing through a venturi?

When a fuel flows through a venturi, it is subjected to the principles outlined by Bernoulli's equation, which describes the behavior of fluid dynamics in various conditions. As the fluid enters the venturi, it encounters a constricted section where the cross-sectional area decreases. According to the principle of conservation of energy, the total mechanical energy, which includes kinetic energy, potential energy, and pressure energy, remains constant along streamline flow.

As the fluid velocity increases while passing through the narrower section of the venturi, its kinetic energy increases. This increase in kinetic energy corresponds to a corresponding decrease in static pressure. The behavior can be attributed to the fact that as the area decreases, fluid particles must speed up to maintain a steady flow rate, leading to an increase in kinetic energy while the pressure being exerted by the fluid drops.

In summary, the fuel experiences an increase in kinetic energy when it speeds up in the venturi section, while the pressure exerted by the fluid decreases. This relationship is foundational in fluid dynamics and is particularly leveraged in various applications, including carburetors and atomizers in engines.