Compressor Rotor Blade Leading-Edge Indent for Impact Robustness

The patent applies local quality by creating an indent segment specifically at the leading edge region where foreign object impacts most frequently occur. This localized geometric modification concentrates material and structural reinforcement exactly where needed (at the leading edge tip and intermediate regions) rather than uniformly throughout the entire blade, thereby improving resistance to plastic deformation at the impact zone while minimizing additional weight across the whole blade structure.

The patent applies parameter changes by carefully controlling the geometric parameters of the indent segment, specifically the ratio of indent depth to leading edge radial length (0.05 to 0.20) and the position of the intermediate point (0.20 to 0.45 from the tip). These parameter adjustments create an optimal balance where the leading edge has sufficient stiffness to resist plastic deformation from impacts, while the blade body maintains adequate elasticity to deform under high loads without permanent damage.

The patent applies parameter changes by defining specific ranges for the indent depth ratio (0.05 to 0.20) and the intermediate point position ratio (0.20 to 0.45). These parameter constraints simplify the design process by providing clear guidelines for manufacturing while ensuring sufficient robustness. The controlled parameter ranges prevent excessive complexity by limiting how deep and complex the indent can be, balancing robustness requirements with manufacturing feasibility and geometric simplicity.