An investigation into the effect of longitudinal micro-striations and their profiles, on the drag of flat plates

Simple item page
dc.contributor.advisorSayers, A Ten_ZA
dc.contributor.authorParker, Kamalluddienen_ZA
dc.date.accessioned2016-05-24T09:14:13Z
dc.date.available2016-05-24T09:14:13Z
dc.date.issued1997en_ZA
dc.description.abstractThis report describes an investigation into the use of streamwise-machined grooves as a means of reducing the drag force experienced by a flat plate. V-grooves of specific dimensions are machined onto the surface of a smooth plate, in a streamwise direction. The effect of these surface modifications on the drag force of a smooth plate is examined. The use of surface modifications as a means of reducing viscous drag on a body has potential aerodynamic and hydrodynamic applications. The idea that a longitudinally grooved surface ("riblets") could reduce the turbulent skin friction developed in part from the concept that the scales of fast-swimming sharks may have a surface structure that improves boundary-layer performance. Previously conducted experiments show that v-grooves parallel to the airflow reduce drag by 4 to 7 percent. Reduced aerodynamic drag in aircraft for example, translates into reduced engine power required to overcome the drag and ultimately to lower fuel consumption. The initial part of this thesis, which dealt with the assimilation of information regarding previous riblet research, indicated that riblets with av-groove or triangular geometry had shown the greatest potential for use as a drag reducing mechanism. The experimental part of this thesis explores two possible riblet geometries. The performance of a symmetric and unsymmetrical v-groove pattern is investigated.en_ZA
dc.identifier.apacitationParker, K. (1997). <i>An investigation into the effect of longitudinal micro-striations and their profiles, on the drag of flat plates</i>. (Thesis). University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Mechanical Engineering. Retrieved from http://hdl.handle.net/11427/19815en_ZA
dc.identifier.chicagocitationParker, Kamalluddien. <i>"An investigation into the effect of longitudinal micro-striations and their profiles, on the drag of flat plates."</i> Thesis., University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Mechanical Engineering, 1997. http://hdl.handle.net/11427/19815en_ZA
dc.identifier.citationParker, K. 1997. An investigation into the effect of longitudinal micro-striations and their profiles, on the drag of flat plates. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Parker, Kamalluddien AB - This report describes an investigation into the use of streamwise-machined grooves as a means of reducing the drag force experienced by a flat plate. V-grooves of specific dimensions are machined onto the surface of a smooth plate, in a streamwise direction. The effect of these surface modifications on the drag force of a smooth plate is examined. The use of surface modifications as a means of reducing viscous drag on a body has potential aerodynamic and hydrodynamic applications. The idea that a longitudinally grooved surface ("riblets") could reduce the turbulent skin friction developed in part from the concept that the scales of fast-swimming sharks may have a surface structure that improves boundary-layer performance. Previously conducted experiments show that v-grooves parallel to the airflow reduce drag by 4 to 7 percent. Reduced aerodynamic drag in aircraft for example, translates into reduced engine power required to overcome the drag and ultimately to lower fuel consumption. The initial part of this thesis, which dealt with the assimilation of information regarding previous riblet research, indicated that riblets with av-groove or triangular geometry had shown the greatest potential for use as a drag reducing mechanism. The experimental part of this thesis explores two possible riblet geometries. The performance of a symmetric and unsymmetrical v-groove pattern is investigated. DA - 1997 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1997 T1 - An investigation into the effect of longitudinal micro-striations and their profiles, on the drag of flat plates TI - An investigation into the effect of longitudinal micro-striations and their profiles, on the drag of flat plates UR - http://hdl.handle.net/11427/19815 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/19815
dc.identifier.vancouvercitationParker K. An investigation into the effect of longitudinal micro-striations and their profiles, on the drag of flat plates. [Thesis]. University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Mechanical Engineering, 1997 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/19815en_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.titleAn investigation into the effect of longitudinal micro-striations and their profiles, on the drag of flat platesen_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
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
thesis_ebe_1997_parker_kamalluddien.pdf
Size:
4.07 MB
Format:
Adobe Portable Document Format
Description:
Download
Collections
Masters