Effects of tip clearance on overall performance of transonic fan stage with and without casing treatment |
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0.061 centimeter Reading 0.178 centimeter Reading 100-Percent design speed 178 centimeter 70-Percent design 8-8 at design Adiabatic efficiency design blade tip clearance centimeter Reading Rotative clearance on overall clearance was increased 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 nonrotating tip nominal tip clearances nonrotating rotor blade nonrotating tip clearance open skewed slots overall performance peak efficiency percent of Airflow Pressure ratio Adiabatic Pressure ratio Temperature Pressure Temperature Adiabatic rake ratio Adiabatic efficiency ratio efficiency design ratio ratio efficiency ratio Temperature ratio Reading Rotative speed rotating tip clearance Rotor blade tip rotor-blade tip clearance solid stage was tested stall point stator Temperature ratio Adiabatic test stage thermocouple total-temperature transonic fan stage