What is the Venturi effect?

The Venturi effect refers to the phenomenon where there is a reduction in pressure that occurs when a fluid flows through a constricted passage. This principle is fundamental in various mechanical and engineering applications, particularly in carburetors, where it plays a vital role in mixture formation.

When fluid enters a narrow section of a tube, the velocity of the fluid increases as it is forced through the constriction. According to Bernoulli's principle, as the velocity increases, the pressure within that fluid stream decreases. This drop in pressure creates a suction effect, which can draw in additional fluid, such as fuel in the case of a carburetor, mixing it with air to create a combustible mixture for internal combustion engines.

This understanding is essential for small engine technology, as it directly relates to how air-fuel mixtures are regulated and optimized for engine performance. Recognizing the importance of the Venturi effect helps technicians and engineers design more efficient fuel delivery systems in small engines.