Effects of tip clearance on overall performance of transonic fan stage with and without casing treatment |
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Page 6
... tip clearance . This operating line corresponds very closely to the peak ... nominal tip clearances were obtained statically , and the blade growth was ... nonrotating rotor blade tip clearances from 0.061 to 0.178 centimeter were ...
... tip clearance . This operating line corresponds very closely to the peak ... nominal tip clearances were obtained statically , and the blade growth was ... nonrotating rotor blade tip clearances from 0.061 to 0.178 centimeter were ...
Page 24
... Nominal nonrotating tip clearance , cm Figure 11. - Effects of rotor - blade tip clearance and casing treatment on overall performance of stage 8-8 at design speed . ( Data based on as- sumed operating line . ) а .08 .12 Casing ...
... Nominal nonrotating tip clearance , cm Figure 11. - Effects of rotor - blade tip clearance and casing treatment on overall performance of stage 8-8 at design speed . ( Data based on as- sumed operating line . ) а .08 .12 Casing ...
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... Nominal nonrotating tip clearance , cm Figure 12. - Effects of rotor - blade tip clearance and casing treatment on stall margin of stage 8-8 at design speed . ( Data based on assumed operating line . ) 20 .20 NASA - Langley , 1977 E ...
... Nominal nonrotating tip clearance , cm Figure 12. - Effects of rotor - blade tip clearance and casing treatment on stall margin of stage 8-8 at design speed . ( Data based on assumed operating line . ) 20 .20 NASA - Langley , 1977 E ...
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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