Article
Article
- Engineering & Materials
- Propulsion
- Pulse jet
Pulse jet
Article By:
Pinkel, Benjamin Consulting Engineering, Santa Monica, California.
Last reviewed:January 2020
DOI:https://doi.org/10.1036/1097-8542.556800
A type of jet engine characterized by periodic surges of thrust. The pulse jet engine was widely known for its use during World War II on the German V-1 missile (Fig. 1). The basic engine cycle was invented in 1908. The inlet end of the engine is provided with a grid to which are attached flap valves. These valves are normally held by spring tension against the grid face and block the flow of air back out of the front of the engine. They can be sucked inward by a negative differential pressure to allow air to flow into the engine. Downstream from the flap valves is the combustion chamber. A fuel injection system is located at the entrance to the combustion chamber. The chamber is also fitted with a spark plug. Following the combustion chamber is a long exhaust duct which provides an inertial gas column.
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