In an impulse turbine, the fixed blades...

Question 1 / 270705eccefa0bacbc34ba4d470e6

Question 1 of 270705eccefa0bacbc34ba4d470e6

In an impulse turbine, the fixed blades function to __________.

Question 1 of 27070

In an impulse turbine, the fixed blades function to __________.

🔍 Key Concepts

• Impulse turbine basic principle: pressure drop occurs across the nozzles, not the moving blades • Difference between fixed (stationary) blades and moving (rotor) blades in a turbine stage • What happens to steam velocity vs. steam direction as it passes through nozzles and guide vanes

💭 Think About

• Think about where the main pressure drop and velocity increase of the steam actually occur in an impulse turbine: in the fixed blades, the moving blades, or somewhere else? • Ask yourself: are the fixed blades mainly changing the steam’s speed, its pressure, or just how it is aimed at the moving blades? • Which choice best describes what guide vanes/nozzles must do so steam strikes the moving blades efficiently at the correct angle?

✅ Before You Answer

• Verify that in a pure impulse stage, almost all the pressure drop is across the nozzles/fixed blades, not across the rotor blades • Check whether fixed blades in an impulse turbine are also called nozzles or guide vanes, and what their primary job is in directing the steam jet • Eliminate any option that would mainly describe a reaction turbine function rather than an impulse turbine behavior

Question 1 of 27070

In an impulse turbine, the fixed blades function to __________.

prevent steam turbulence

decrease steam velocity

equalize pressure differences

change the direction of steam flow

Question 1 / 270705eccefa0bacbc34ba4d470e6

Question 1 of 270705eccefa0bacbc34ba4d470e6

In an impulse turbine, the fixed blades function to __________.

Back

Question 1 of 27070

In an impulse turbine, the fixed blades function to __________.