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Skin friction on a NACA0015 profile in the wake of a marine propeller

Miozzi, Massimo and Dubbioso, Giulio and Muscari, Roberto and Costantini, Marco (2019) Skin friction on a NACA0015 profile in the wake of a marine propeller. In: Proceedings of the 6th International Conference on Advanced Model Measurement Technology for The Maritime Industry (1B-2), 1 - 9. Hydro-Testing Forum. 6th International Conference on Advanced Model Measurement Technology for The Maritime Industry, 9.-11. Okt. 2019, Rom, Italien.

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Official URL: https://www.amt19.com/conference-programme

Abstract

We report about the feasibility to experimentally characterize the interaction between a propeller and a hydrofoil model at incidence in its wake by using a temperature-sensitive paint. The experiments were conducted in a cavitation water tunnel at a freestream speed of 3.4 m/s and at a propeller rotational speed of 17 rps for two model angles of attack (4° and 8°). Time-resolved maps of the temperature evolution on both suction and pressure sides of the model obtained by means of the temperature-sensitive paint allow to take advantage of the direct link between friction velocity and celerity of propagation of temperature disturbances. By minimizing the dissimilarity between the observed propagation and that of the ideal wave suggested by the Taylor hypothesis, a quantitative estimation of the friction velocity vector field is gained. Detached eddy simulations are also conducted for the examined problem in the case of a model angle of attack of 4°, providing numerical data that are compared with the experimental results. The analysis of time-averaged results unveil the existence of laminar separation bubbles, stretched and folded according to the constructive / destructive coupling of the pressure fields induced by the hydrofoil incidence and by the propeller streamtube.

Item URL in elib:https://elib.dlr.de/129727/
Document Type:Conference or Workshop Item (Speech)
Additional Information:Paper 1B-2, Session 1B
Title:Skin friction on a NACA0015 profile in the wake of a marine propeller
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Miozzi, MassimoMassimo.Miozzi (at) cnr.itUNSPECIFIED
Dubbioso, GiulioGiulio.Dubbioso (at) cnr.itUNSPECIFIED
Muscari, RobertoRoberto.Muscari (at) cnr.itUNSPECIFIED
Costantini, Marcomarco.costantini (at) dlr.dehttps://orcid.org/0000-0003-0642-0199
Date:October 2019
Journal or Publication Title:Proceedings of the 6th International Conference on Advanced Model Measurement Technology for The Maritime Industry
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:1 - 9
Publisher:Hydro-Testing Forum
Series Name:Conference Proceedings online
Status:Published
Keywords:Temperature-Sensitive Paint; Propeller; Boundary Layer; Skin Friction; Laminar Separation Bubble
Event Title:6th International Conference on Advanced Model Measurement Technology for The Maritime Industry
Event Location:Rom, Italien
Event Type:international Conference
Event Dates:9.-11. Okt. 2019
Organizer:Hydro-Testing Forum
Institution:Deutsches Zentrum für Luft- und Raumfahrt e.V.
Department:AS-EXV
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: Micknaus, Ilka
Deposited On:23 Oct 2019 15:27
Last Modified:23 Oct 2019 15:27

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