Where are turbine nozzle diaphragms located relative to the turbine wheel?

Where are turbine nozzle diaphragms located relative to the turbine wheel?

• A. On the upstream side of each turbine wheel.
• B. On the downstream side of each turbine wheel.
• C. Inside the combustion chamber.
• D. At the exhaust outlet.

Answer: (A)

Turbine nozzle diaphragms are stationary guide vanes placed in front of the turbine wheel. Their job is to shape and accelerate the hot gas so it hits the rotor blades at the correct angle and with the right velocity, maximizing energy transfer. Because they sit upstream, they direct flow into the wheel rather than after the gas has already passed the blades. They are not located in the combustion chamber or at the exhaust, which are outside the turbine’s direct flow path to the rotor.

Turbine nozzle diaphragms are stationary guide vanes placed in front of the turbine wheel. Their job is to shape and accelerate the hot gas so it hits the rotor blades at the correct angle and with the right velocity, maximizing energy transfer. Because they sit upstream, they direct flow into the wheel rather than after the gas has already passed the blades. They are not located in the combustion chamber or at the exhaust, which are outside the turbine’s direct flow path to the rotor.