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EnglishResults of an experimental investigation devoted to the assessment of methodologies aimed at the friction drag measurement in turbulent wall flows are presented. Two techniques for local measurements have been developed. Namely, different versions of the velocity profile method have been used for a turbulent boundary layer developing on a flat plate. The oil flow interferometer has been arranged and results related with measurements performed in a fully developed turbulent channel flow and in the turbulent boundary layer are presented. Moreover a balance based on a floating-buoyancy system finalized to the integral measurement of the friction force acting on the flat plate is presented. The results of the three techniques are compared considering as a reference a well assessed empirical law. Good level of measurement accuracy using the balance has been evidenced highlighting the capability of the balance or the characterization of micro-grooved surfaces addressed for friction drag reduction applications.
Friction drag measurements in turbulent wall flows / Iuso, Gaetano; Sedda, Salvatore; Pesando, M.; Sardu, Costantino. - STAMPA. - 1(2017), pp. 191-205. ((Intervento presentato al convegno XXIII Conference of the Italian Association of Theoretical and Applied Mechanics tenutosi a Salerno nel 4-7 Settembre 2017.
| Titolo: | Friction drag measurements in turbulent wall flows |
| Autori: | |
| Data di pubblicazione: | 2017 |
| Abstract: | Results of an experimental investigation devoted to the assessment of methodologies aimed at the ...friction drag measurement in turbulent wall flows are presented. Two techniques for local measurements have been developed. Namely, different versions of the velocity profile method have been used for a turbulent boundary layer developing on a flat plate. The oil flow interferometer has been arranged and results related with measurements performed in a fully developed turbulent channel flow and in the turbulent boundary layer are presented. Moreover a balance based on a floating-buoyancy system finalized to the integral measurement of the friction force acting on the flat plate is presented. The results of the three techniques are compared considering as a reference a well assessed empirical law. Good level of measurement accuracy using the balance has been evidenced highlighting the capability of the balance or the characterization of micro-grooved surfaces addressed for friction drag reduction applications. |
| ISBN: | 978-889-42484-7-0 |
| Appare nelle tipologie: | 4.1 Contributo in Atti di convegno |
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| File | Descrizione | Tipologia | Licenza | |
|---|---|---|---|---|
| AIMETA_2017_Friction drag measurements in turbulent wall flows.pdf | Testo contributo XXIII Congresso AIMETA Salerno 2017 | 2. Post-print / Author's Accepted Manuscript | PUBBLICO - Tutti i diritti riservati | Visibile a tuttiVisualizza/Apri |
http://hdl.handle.net/11583/2692024
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