Effects of tip clearance on overall performance of transonic fan stage with and without casing treatment |
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0.102 centimeter Reading 061 centimeter Reading 100-Percent design speed 178 centimeter 8-8 at design Adiabatic efficiency design Adiabatic ratio ratio assumed operating line blade tip clearance centimeter Reading Rotative clearance on overall clearances from 0.061 clearances of 0.061 closed skewed slots closed-skewed-slot Effect of rotor-blade EFFECTS OF TIP efficiency decreased efficiency design speed Figure 11 Four nominal nonrotating increasing clearance increasing tip clearance kg/sec Pressure ratio kg/sec Pressure Temperature Lewis Research Center margin was obtained nominal nonrotating rotor nominal tip clearances nonrotating rotor blade nonrotating tip clearance open skewed slots overall performance peak efficiency percent of Airflow plenum chamber Pressure ratio Temperature Pressure Temperature Adiabatic rake ratio Adiabatic efficiency ratio efficiency design ratio ratio efficiency ratio Temperature ratio Reading Rotative speed Rotor blade tip rotor-blade tip clearance solid stage was tested Stall line 1.2 stall point stator Temperature Adiabatic ratio Temperature ratio Adiabatic test stage thermocouple total-temperature transonic fan stage