A de Laval nozzle is a specially designed tube that helps accelerate gases to supersonic speeds. It has a unique shape, narrowing in the middle and then expanding again, which allows the gas to speed up as it passes through. This design is commonly used in rocket engines and jet propulsion systems. The nozzle operates based on the principles of fluid dynamics, specifically the Bernoulli's principle. As the gas flows through the nozzle, its pressure decreases while its velocity increases, enabling efficient thrust generation. This makes de Laval nozzles essential for various aerospace applications.