Supersonic wind-tunnel : nozzle design and control system analysis

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dc.contributor.advisorGryzagoridis, Jassonen_ZA
dc.contributor.authorCox, Riordan Howard Teslingen_ZA
dc.date.accessioned2016-03-14T07:16:58Z
dc.date.available2016-03-14T07:16:58Z
dc.date.issued1973en_ZA
dc.description.abstractSymmetrical two-dimensional nozzles were designed for the supersonic wind-tunnel, in the Department of Mechanical Engineering, using both analytical and semigraphical methods obtained from the theory of Characteristics. These nozzles, designed for an optimum running time of 30 seconds, at a Mach number of 2,35. Boundary layer growth was considered by displacing the nozzle contours outwards by the equivalent displacement thickness, while keeping the vertical tunnel side walls parallel. The five pitot probe calibration results, taken through the central vertical plane in the tunnel test-section, showed Mach number standard deviations about the mean of 0,638% and 1,004% for the analytical and semi-graphical design respectively. These results compare ·very favourably with those of other wind- tunnels. Without pressure recovery the critical flow pressure ratio through the tunnel for Mach 2,35 nozzles, is 2,53. Therefore it may be shown that the subsonic diffuser, and the silencer incorporated into it, is about 75% efficient. The analysis and modification to the existing settling chamber control valve yielded improvements in performance. 1. The maximum fluctuation in settling chamber pressure was kept to within 5,5% for most operating conditions. 2. Critical valve response was achieved by applying a suitable bypass orifice to the damping cylinder - The valve settled down within one second after flow had been initiated. A proposed variable symmetrical nozzle was examined for the feasibility of its application to the existing supersonic wind-tunnel.en_ZA
dc.identifier.apacitationCox, R. H. T. (1973). <i>Supersonic wind-tunnel : nozzle design and control system analysis</i>. (Thesis). University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Mechanical Engineering. Retrieved from http://hdl.handle.net/11427/17711en_ZA
dc.identifier.chicagocitationCox, Riordan Howard Tesling. <i>"Supersonic wind-tunnel : nozzle design and control system analysis."</i> Thesis., University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Mechanical Engineering, 1973. http://hdl.handle.net/11427/17711en_ZA
dc.identifier.citationCox, R. 1973. Supersonic wind-tunnel : nozzle design and control system analysis. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Cox, Riordan Howard Tesling AB - Symmetrical two-dimensional nozzles were designed for the supersonic wind-tunnel, in the Department of Mechanical Engineering, using both analytical and semigraphical methods obtained from the theory of Characteristics. These nozzles, designed for an optimum running time of 30 seconds, at a Mach number of 2,35. Boundary layer growth was considered by displacing the nozzle contours outwards by the equivalent displacement thickness, while keeping the vertical tunnel side walls parallel. The five pitot probe calibration results, taken through the central vertical plane in the tunnel test-section, showed Mach number standard deviations about the mean of 0,638% and 1,004% for the analytical and semi-graphical design respectively. These results compare ·very favourably with those of other wind- tunnels. Without pressure recovery the critical flow pressure ratio through the tunnel for Mach 2,35 nozzles, is 2,53. Therefore it may be shown that the subsonic diffuser, and the silencer incorporated into it, is about 75% efficient. The analysis and modification to the existing settling chamber control valve yielded improvements in performance. 1. The maximum fluctuation in settling chamber pressure was kept to within 5,5% for most operating conditions. 2. Critical valve response was achieved by applying a suitable bypass orifice to the damping cylinder - The valve settled down within one second after flow had been initiated. A proposed variable symmetrical nozzle was examined for the feasibility of its application to the existing supersonic wind-tunnel. DA - 1973 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1973 T1 - Supersonic wind-tunnel : nozzle design and control system analysis TI - Supersonic wind-tunnel : nozzle design and control system analysis UR - http://hdl.handle.net/11427/17711 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/17711
dc.identifier.vancouvercitationCox RHT. Supersonic wind-tunnel : nozzle design and control system analysis. [Thesis]. University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Mechanical Engineering, 1973 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/17711en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentDepartment of Mechanical Engineeringen_ZA
dc.publisher.facultyFaculty of Engineering and the Built Environment
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherMechanical Engineeringen_ZA
dc.titleSupersonic wind-tunnel : nozzle design and control system analysisen_ZA
dc.typeMaster Thesis
dc.type.qualificationlevelMasters
dc.type.qualificationnameMSc (Eng)en_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
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