This document discusses jet engine combustion chambers. It describes the purpose of combustion chambers as converting fuel chemical energy to heat energy. Some key requirements are easy and safe ignition, stable burning, and uniform pressure and velocity fields. Main challenges include high heat loads, temperatures over 2000K, and ensuring stable ignition and burning. The combustion process involves air entering and being apportioned between primary and secondary flows before mixing with fuel and igniting. Parameters like pressure, temperature and flows are discussed along with combustion chamber construction types such as multiple, annular and turbo-annular designs.