An Experimental and Analytical Investigation of Dynamic Flow Response of a Fan Rotor with Distorted Inlet Flow

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dc.contributor.authorSchwartz, Jeffrey R.en
dc.contributor.committeechairO'Brien, Walter F. Jr.en
dc.contributor.committeememberDancey, Clinton L.en
dc.contributor.committeememberKing, Peter S.en
dc.contributor.departmentMechanical Engineeringen
dc.date.accessioned2014-03-14T21:43:06Zen
dc.date.adate1999-08-31en
dc.date.available2014-03-14T21:43:06Zen
dc.date.issued1999-08-12en
dc.date.rdate2000-08-31en
dc.date.sdate1999-08-20en
dc.description.abstractAn experimental and analytical investigation was conducted to gain insight and ultimately predict the dynamic flow response of a fan rotor with inlet flow distortion. Rotor exit total pressure circumferential profiles were accurately predicted using frequency response functions derived from experimental rotor response data. Using these predicted profiles, an initial attempt was made at predicting the dynamic (distorted) stage characteristics of the test machine with promising results. The first step of this research was an experimental investigation to gather unsteady rotor response data. The steady three-dimensional inlet flow of an isolated rotor subjected to inlet distortion was obtained using a five-hole pneumatic prism probe. Exit flow dynamic wake data were obtained using a piggyback steady/unsteady total pressure probe in non-nulling mode. Inlet and exit data were collected for eighteen different combinations of distortion level, operating point, and measurement span. Frequency response functions were generated and then averaged for each operating regime, span, and distortion intensity, assuming the data to be stationary and ergodic. These 'generalized' FRF's were used to predict the rotor exit total pressure profile. These pressure profiles were then used in an initial attempt to predict the dynamic stage (distorted) characteristics of the test machine. Best predictions resulted when an FRF was used for individual operating regimes, defined with respect to rotor blade mean aerodynamic loading.en
dc.description.degreeMaster of Scienceen
dc.identifier.otheretd-082099-123729en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-082099-123729/en
dc.identifier.urihttp://hdl.handle.net/10919/44314en
dc.publisherVirginia Techen
dc.relation.haspartmainetd2.pdfen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectrotoren
dc.subjectpressureen
dc.subjectresponseen
dc.subjectwakeen
dc.subjectdistortionen
dc.subjectModelingen
dc.subjectfrequency response functionen
dc.subjectdynamicen
dc.subjectcompressoren
dc.titleAn Experimental and Analytical Investigation of Dynamic Flow Response of a Fan Rotor with Distorted Inlet Flowen
dc.typeThesisen
thesis.degree.disciplineMechanical Engineeringen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

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