Difficulty: Medium
Correct Answer: Blade camber and space–chord ratio
Explanation:
Concept/Approach
Exit flow angle deviation is an empirical/physics-based function of profile camber and cascade solidity (space–chord ratio). Greater camber and lower solidity (higher space–chord) typically increase deviation due to boundary-layer and turning limits.
Why other options fall short
Camber alone or space–chord alone are incomplete; incidence is more relevant to loss and stall margin than to the systematic deviation law used in design correlations.
Final Answer
Blade camber and space–chord ratio
Discussion & Comments