👉 The activation fluid, also known as the starting fluid or priming fluid, is a critical component in gas turbine engines, particularly in spark-ignited and some compression-ignited systems. It serves to initiate combustion by reducing the surface tension of the fuel, allowing it to spread more easily across the combustion chamber's surfaces. This fluid is typically a light, volatile liquid with a low viscosity, which helps in achieving a uniform fuel-air mixture and ensures efficient combustion. By lowering the ignition temperature and enhancing the mixing of fuel and air, the activation fluid plays a vital role in optimizing engine performance, efficiency, and emissions control.