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dc.contributor.authorGriffith, Dwaine O.en_US
dc.date.accessioned2014-03-14T21:50:30Z
dc.date.available2014-03-14T21:50:30Z
dc.date.issued1989-04-15en_US
dc.identifier.otheretd-11212012-040333en_US
dc.identifier.urihttp://hdl.handle.net/10919/45979
dc.description.abstract

A high-frequency combination probe was used to measure dynamic flow quality in the test section of the NASA Langley 0.3-m Transonic Cryogenic Tunnel. The probe measures fluctuating stagnation (total) temperature and pressure, static pressure, and flow angles in two orthogonal planes. Simultaneous unsteady temperature and pressure measurements were also made in the settling chamber of the tunnel. The data show that the stagnation temperature fluctuations remain constant, and the stagnation pressure fluctuations increase by a factor of two, as the flow accelerates from the settling chamber to the test section. In the test section, the maximum rms value of the normalized fluctuating velocity is 0.7 percent. Correlation coefficients l failed to show vortlcity, entropy, or sound as the dominant mode of turbulence in the tunnel.

At certain tunnel operating conditions, periodic disturbances are seen in the data taken in the test section. A possible cause for the disturbances is found to be acoustic coupling of the test section and plenum chamber via the perforated side walls in the tunnel. The experimental data agree well with the acoustic coupling theory.

en_US
dc.format.mediumBTDen_US
dc.publisherVirginia Techen_US
dc.relation.haspartLD5655.V855_1989.G733.pdfen_US
dc.subjectWind tunnelsen_US
dc.subject.lccLD5655.V855 1989.G733en_US
dc.titleTurbulence measurements and noise generation in a transonic cryogenic wind tunnelen_US
dc.typeThesisen_US
dc.contributor.departmentMechanical Engineeringen_US
dc.description.degreeMaster of Scienceen_US
thesis.degree.nameMaster of Scienceen_US
thesis.degree.levelmastersen_US
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen_US
thesis.degree.disciplineMechanical Engineeringen_US
dc.contributor.committeechairNg, Wing Faien_US
dc.contributor.committeememberMoore, Johnen_US
dc.contributor.committeememberDancey, Clinton L.en_US
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-11212012-040333/en_US
dc.date.sdate2012-11-21en_US
dc.date.rdate2012-11-21
dc.date.adate2012-11-21en_US


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