FSP's Jet Engine Kit

View costs and purchasing options - Thrust and how to get it with our simple design - Jet Homepage - Have a question? Contact us! - Coming soon - Hovercraft Homepage

Combustion Chambers

The goal of a combustion chamber is to mix the fuel air mixture, sustain ignition, and completely burn all the fuel. The trick to keeping ignition sustained is to have a rich to lean mixture in the chamber. The burning of a rich mixture is more stable and is less likely to blow itself out. Only part of the air is inserted into the front of the combustion chamber to create this rich condition. Then more air is added near the end of the chamber to lean the mixture and burn the rest of the fuel. A simple diagram below shows how this is accomplished.

Baffles are placed inside the chamber to aid in the mixing process, and to create a "flame holder." This is an area of turbulence where the mixture slows down enough to create a spot that won't be blown out by the fast moving air. In short, these strategically placed baffles improve mixing and create a more stable flame.