Which risk increases when a turbine stage operates under off-design expansion ratios?

💡 Explanation

Boundary layer separation risk emerges on turbine blades because adverse pressure gradients intensify under off-design conditions; therefore flow can’t negotiate the blade’s surface, rather than surge which impacts compressors or combustion instability from fuel mixture irregularities under other conditions.

• Which outcome often results when thin-film coated optics degrade?
• Which mechanism enables an electron's traversal of an electrical insulator?
• Which risk grows when overlapping atomic orbitals are spatially constrained?
• Which outcome results within a Josephson junction when the oxide layer increases beyond manufacturing tolerances?
• Which energy dissipation occurs in irreversible Carnot engine operating between two finite reservoirs?
• Which outcome occurs when platinum catalyst surface area decreases during ammonia oxidation for nitric acid production?