What is the function of the interconnecting tube in a gas turbine engine?

The interconnecting tube in a gas turbine engine plays a crucial role in regulating the pressure within the combustion chambers. Its primary function is to ensure that each combustion chamber operates at the same pressure, which is vital for balanced performance across the engine. When all combustion chambers maintain the same pressure, it helps in achieving uniform combustion, leading to an efficient and stable operation of the engine. This uniformity is important because uneven pressure could cause variations in the combustion process, potentially leading to performance issues and increased emissions.

By linking the combustion chambers together, the interconnecting tube mitigates pressure fluctuations that may occur due to differences in the combustion process or air and fuel distribution. This alignment of pressure also contributes to smoother overall airflow and better engine performance, ensuring that the gas turbine operates efficiently across different throttle settings.