Object | Aerodynamic damping ratio |
Source |
---|---|---|
SO-3 turbine blades (free-standing) | 0.14% (calculated) | Formulas ( |
High pressure turbine blades of Honeywell TFE 731-2 engine (free-standing) | 0.14%–0.26% (±0.11%) | Kielb & Abhari, 2001 |
Steam turbine blades (free-standing) | 0.21%–0.40% |
Object | Amplitude reduction (%) | Source |
---|---|---|
SO-3 turbine (free-standing blades, baseline under-platform dampers) | -62.0 | |
SO-3 turbine (free-standing blades, optimized under-platform dampers) | -74.0 | |
Axial compressor (free-standing blades, roller under-platform dampers) | -80.0 | |
Volvo RM6/RM8 turbine (freestanding blades, under-platform dampers) | -80.0 | |
Steam turbine (last stage blades coupled by damping bolts) | -83.3 |