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What is true regarding the impulse-reaction blade shape?
  • A
    The inner half is reaction shaped and the outer half is impulse shaped.
  • B
    The inner half is impulse shaped and the outer half is reaction shaped.
  • C
    The trailing edge is reaction shaped and the leading edge is impulse shaped.
  • D
    The leading edge is reaction shaped and the trailing edge is impulse shaped.

Refer to figures.
IMPULSE-REACTION TURBINE BLADES
Turbine blades are generally classified as impulse, reaction, or combination impulse-reaction. To more evenly distribute the workload along the length of the blade, most modern turbine engines incorporate impulse-reaction turbine blades. With this type of blade, the blade base is impulse-shaped while the blade tip is reaction-shaped. This design results in a uniform velocity and pressure drop across the entire blade length.

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