Discussion
Assertion (A): Pattern factor receives as much development effort as combustion efficiency.
Reason (R): Turbine blade life is set by the hottest blade rather than by the average temperature.
Select the correct answer from the options below.
Answer: D
Correct answer: Both A and R are true, and R is the correct explanation of A
Both are true and the reason gives the justification. Turbine blade life depends on the temperature the hottest blade actually sees, and creep life falls very steeply with temperature, so a hot streak in the exit traverse costs far more life than a uniformly higher average would. Pattern factor quantifies that non-uniformity, and reducing it is worth as much development effort as efficiency.
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