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 mechanism enables refrigeration during adiabatic expansion of isobutane?
• Which risk significantly worsens when metallic shielding obstructs microwave communication?
• Which effect compromises optical image reconstruction when interferometer coherence diminishes?
• Which outcome occurs when uranium ore decays beyond capacity?
• Which risk increases when strong external magnetic fields interfere with a spacecraft's hall-effect thruster?
• Which mechanism impairs satellite communication using circularly polarized beams under heavy rainfall?