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Skin friction fields from TSP surface patterns on an underwater cylinder in crossflow

Miozzi, Massimo and Capone, Alessandro and Di Felice, Fabio and Klein, Christian and Liu, Tianshu (2016) Skin friction fields from TSP surface patterns on an underwater cylinder in crossflow. 18th International Symposia on Applications of Laser Techniques to Fluid Mechanics, Lisbon 2016, 07.-07. Juli 2016, Lisbon, Portugal.

Full text not available from this repository.

Abstract

The relationship between the Temperature Sensitive Paints (TSP) surface pattern and the corresponding relative skin-friction field is investigated for an underwater cylinder in crossflow at subcritical regime. The temperature map evolution can be decomposed in the contribution of a time-averaged, a phase-averaged and a random component. The first two contributions are discussed here. The asymptotic form of the energy equation at wall, solved by following the variational approach, provides relative skin friction fields from the TSP surface temperature maps. Results about the spatial distribution of the time averaged relative skin-friction profiles are compared with literature data. The comparison shows an excellent agreement on the whole laminar boundary layer up to the laminar separation line. Downstream, TSP-related results capture the secondary reattachment/separation events, which are lost in the literature data. Phase-averaged skin friction sequences capture the evolution of the laminar separation, of the turbulent reattachment and of the final separation, providing a description of the Laminar Separation Bubble (LSB) over the whole shedding period. Evolution with Re of the time averaged position of the LSB is in agreement with literature data.

Item URL in elib:https://elib.dlr.de/104736/
Document Type:Conference or Workshop Item (Speech)
Additional Information:http://ltces.dem.ist.utl.pt/lxlaser/lxlaser2016/
Title:Skin friction fields from TSP surface patterns on an underwater cylinder in crossflow
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Miozzi, MassimoCNR-INSEAN, via di Vallerano 139, 00128, RomeUNSPECIFIED
Capone, AlessandroCNR-INSEAN, via di Vallerano 139, 00128, RomeUNSPECIFIED
Di Felice, FabioCNR-INSEAN Istituto Nazionale Studi ed Esperienze di Architettura Navale, Via di Vallerano 139, 00128 Rome, ItalyUNSPECIFIED
Klein, ChristianChristian.Klein (at) dlr.deUNSPECIFIED
Liu, TianshuWestern Michigan University, Klamazoo, MI 49008UNSPECIFIED
Date:2016
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Temperature Sensitive Paints, Cylinder, Vortex Shedding, Laminar Separation Bubble, Transiton, Skin friction
Event Title:18th International Symposia on Applications of Laser Techniques to Fluid Mechanics, Lisbon 2016
Event Location:Lisbon, Portugal
Event Type:international Conference
Event Dates:07.-07. Juli 2016
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Simulation and Validation
Location: Göttingen
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Experimental Methods, GO
Deposited By: Bachmann, Barbara
Deposited On:16 Dec 2016 11:51
Last Modified:01 Aug 2017 09:32

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