Nozzle cooler (vehicle)

A nozzle cooler is a heat exchanger in which the cooler generates a certain amount of thrust by heating the air . The effect is based on the fact that the air is compressed at high speed by the dynamic pressure , flows through relatively small gaps through the cooler, heats up and expands there, and then leaves the cooler accelerated through a nozzle . No thrust is generated when standing. This cooling principle was used in aircraft with water-cooled engines .

The principle of the nozzle cooler was patented by Hugo Junkers in 1915 and implemented in practice in the Junkers J 1 . An engine cover for aircraft with radial engines that works on the same principle is called a NACA hood .

The principle in the ramjet engine is used as an active drive . The heating takes place here by injected burning fuel.

literature

Introduction to heat and material exchange on page 117 at books.google.de