Which section is associated with increasing the static pressure of the air flow by transforming velocity energy?

Which section is associated with increasing the static pressure of the air flow by transforming velocity energy?

• A. Stator vanes
• B. Turbine blades
• C. Combustion chamber
• D. Exhaust

Answer: (A)

Diffusion in a diffuser raises static pressure by converting velocity energy into static pressure. Stator vanes are stationary blades that straighten and slow the flow, turning kinetic energy into static pressure as the air moves through the diffuser. This pressure rise is essential before the next compression stage. Turbine blades, by contrast, extract energy from the flow to drive a shaft, so the flow tends to accelerate and lose static pressure rather than gain it. The combustion chamber adds energy to the gas, increasing temperature and total pressure, but not primarily by transforming velocity energy into static pressure. The exhaust accelerates flow to produce thrust, which typically lowers static pressure as velocity increases.

Diffusion in a diffuser raises static pressure by converting velocity energy into static pressure. Stator vanes are stationary blades that straighten and slow the flow, turning kinetic energy into static pressure as the air moves through the diffuser. This pressure rise is essential before the next compression stage.

Turbine blades, by contrast, extract energy from the flow to drive a shaft, so the flow tends to accelerate and lose static pressure rather than gain it. The combustion chamber adds energy to the gas, increasing temperature and total pressure, but not primarily by transforming velocity energy into static pressure. The exhaust accelerates flow to produce thrust, which typically lowers static pressure as velocity increases.