What is the main function of a diffuser in a turbine system?

In a turbine system, the primary function of a diffuser is to decrease airflow speed while simultaneously increasing pressure. As air or gas flows through the diffuser, it is gradually expanded, which slows down its velocity. According to Bernoulli’s principle, as the speed of a fluid decreases, its pressure increases. This pressure rise at the exit of the diffuser is crucial for the efficient operation of the turbine because it allows the flow to be directed optimally into the turbine stages.

In turbine operations, especially in gas turbines, the diffuser is essential for maintaining the appropriate pressure conditions for combustion and maximizing energy extraction during the turbine cycle. Therefore, understanding the role of the diffuser in managing airflow speed and pressure is key to comprehending how turbine systems function effectively.