Engineering and Applied Sciences
The majority of wind power is currently produced on high wind speed sites by large wind turbine, whereas small wind turbines often operate in light wind conditions. Small capacity wind turbines have not received the same engineering attention as their large counterparts. This is partially due to a n...
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| Formato: | Libro |
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ECORFAN-Mexico
2023
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=nlebk&AN=4510646&site=ehost-live header: @attributes: shortDbName: nlebk uiTerm: 4510646 longDbName: eBook Collection (EBSCOhost) uiTag: AN controlInfo: bkinfo: btl: Engineering and Applied Sciences aug: au: MARTÍNEZ-VARGAS, Sergio FIGUEROA-RAMÍREZ, Sandra Jazmín PATIÑO-CARACHURE, Cristóbal SIERRA-GRAJEDA, Juan Manuel isbn: 9786078948093 imageinfo: pubinfo: dt: @attributes: year: 2023 month: 01 day: 01 pub: ECORFAN-Mexico pubContract: ECORFAN-Mexico S.C. place: [N.p.] price: 0.01 limitsGroup: maxCheckoutDays: 1500 pda: N printPagesOffline: 100 printPagesOnline: 100 previewPages: 10000 artinfo: ui: 4510646 1594862710 formats: fmt: @attributes: type: EB doid: NL$4510646$PDF caption: PDF download: Y tig: atl: Engineering and Applied Sciences ptl: Engineering and Applied Sciences aug: au: MARTÍNEZ-VARGAS, Sergio FIGUEROA-RAMÍREZ, Sandra Jazmín PATIÑO-CARACHURE, Cristóbal SIERRA-GRAJEDA, Juan Manuel ab: The majority of wind power is currently produced on high wind speed sites by large wind turbine, whereas small wind turbines often operate in light wind conditions. Small capacity wind turbines have not received the same engineering attention as their large counterparts. This is partially due to a number of unique problems that small wind turbines experience. The most relevant are: low operating Reynolds number (Re<500,000) and high angles of attack. Several studies have suggested that flow control devices such as the spherical tubercle could be used to increase lift before stall and generate more power in such situations. The aim of this study is to determine the effect of tubercle amplitude on aerodynamic performance of an airfoil at low-Re numbers (Re=300,000 & Re=400,000). Three amplitudes were considered in this study: A1=0.005c, A2=0.01c, and A3=0.03c. A detailed 2D simulation study is carried out using a calibrated Transition SST k-ω turbulence model to obtain aerodynamic coefficients and flow characteristics. Results indicate that small tubercles perform better overall than larger tubercles. The airfoil with the smallest tubercle outperforms the unmodified airfoil at both studied Reynolds numbers at angles of attack 0° – 4°. The analysis of the aerodynamic coefficients indicates that the improvement of the aerodynamic performance of the airfoils with tubercles is due to the reduction of the drag coefficient. Pressure, intermittency and wall shear stress contours suggest that the overall drag reduction is achieved through the decrease of friction drag. pubtype: eBook doctype: Book ougenre: Book language: English copyright: @attributes: flag: N copyrightText: holdings: @attributes: islocal: N |
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