The Impact of Surface Roughness on Transonic Compressor Performance

Visa enkel post
dc.contributor.authorChinnaswamy, Sathyavanan
dc.contributor.departmentChalmers tekniska högskola / Institutionen för tillämpad mekaniksv
dc.contributor.departmentChalmers University of Technology / Department of Applied Mechanicsen
dc.date.accessioned2019-07-03T13:49:24Z
dc.date.available2019-07-03T13:49:24Z
dc.date.issued2015
dc.description.abstractThe increasing necessity for highly efficient engines and flow emission standards has steered the need for research into more efficient design and optimization of gas turbines. Surface roughness in the blades of compressors and turbines is one of the factors causing performance deterioration in gas turbines. This study involves the investigation of surface roughness effects on the performance of a research compressor stage through numerical simulations in a commercial CFD code, ANSYS CFX. An initial numerical study on a NACA airfoil was conducted with roughness and validated with the experimental data. It is followed by the implementation of uniform sand grain roughness over the rotor and stator blades of the compressor stage using the surface roughness model available in ANSYS CFX. Two different cases, one with roughness on the rotor and one with roughness on the stator and rotor combination were done. The results from the study shows the reduction in the main performance parameters such as pressure ratio, efficiency and mass flow in the compressor stage. The flow calculations shows an increase in blockage of the flow in the stage with an increase in surface roughness on the blades. Surface streamlines shows the influence of surface roughness on the separation over the suction side of the stator and the regions near the hub in the rotor.
dc.identifier.urihttps://hdl.handle.net/20.500.12380/224321
dc.language.isoeng
dc.relation.ispartofseriesDiploma work - Department of Applied Mechanics, Chalmers University of Technology, Göteborg, Sweden : 2015:40
dc.setspec.uppsokTechnology
dc.subjectMaskinteknik
dc.subjectEnergi
dc.subjectGrundläggande vetenskaper
dc.subjectHållbar utveckling
dc.subjectRymd- och flygteknik
dc.subjectStrömningsmekanik och akustik
dc.subjectMechanical Engineering
dc.subjectEnergy
dc.subjectBasic Sciences
dc.subjectSustainable Development
dc.subjectAerospace Engineering
dc.subjectFluid Mechanics and Acoustics
dc.titleThe Impact of Surface Roughness on Transonic Compressor Performance
dc.type.degreeExamensarbete för masterexamensv
dc.type.degreeMaster Thesisen
dc.type.uppsokH
local.programmeApplied mechanics (MPAME), MSc
Ladda ner
Original bundle
Visar 1 - 1 av 1
Bild (thumbnail)
Namn:
224321.pdf
Storlek:
4.23 MB
Format:
Adobe Portable Document Format
Beskrivning:
Fulltext
Ladda ner
Samling
Examensarbeten för masterexamen