What is the function of crossover tubes in combustion chambers?

The function of crossover tubes in combustion chambers is to transfer flame from one chamber to another. This is a crucial aspect of combustion chamber design, particularly in engines with multiple combustion chambers, such as turbofan engines. The crossover tubes allow for the continuity of combustion and help maintain stable and efficient combustion across all chambers.

When one chamber is ignited and producing flame, the crossover tubes facilitate the propagation of that flame to adjacent chambers, ensuring that all chambers can start combusting properly and work together efficiently. This design helps to minimize the risk of flameout and supports a smooth operation, allowing the engine to perform optimally.

In contrast, the other answers focus on different engine functions: igniting fuel during starting pertains more to the ignition system, directing exhaust gases to turbines relates to the overall exhaust system, and balancing fuel flow refers to fuel management, which are separate processes that do not specifically involve the role of crossover tubes.