What is the function of turbine nozzle diaphragms located on the upstream side of each turbine wheel in a gas turbine engine?

What is the function of turbine nozzle diaphragms located on the upstream side of each turbine wheel in a gas turbine engine?

• A. Increase the velocity of the heated gases flowing past this point.
• B. Increase the pressure in the combustion chamber.
• C. Cool the gases before combustion.
• D. Stabilize the combustion process.

Answer: (A)