Rotordynamic Forces Due to Turbine Tip Leakage: Part II—Radius Scale Effects and Experimental Verification

摘要: This paper presents a radius scale actuator disk model, which describes the flow response to whirling/spinning rotor in an unshrouded turbine. At each azimuth, upstream-downstream variables are matched by results from steady blade analysis presented companion paper, with allowance for mass storage stator-rotor region. The new model can accurately predict magnitude of both direct and cross excitation forces as well their breakdown into work extraction pressure effects. trends versus mean coefficient interblade distance predicted. While underpredicted, trend tip clearance height is also indicated. Thus, captures dominant physical effects caused