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Numerical Investigation of Tangential Blowing over the Rudder of a Vertical Tailplane

Gebhardt, Anna (2018) Numerical Investigation of Tangential Blowing over the Rudder of a Vertical Tailplane. Deutscher Luft- und Raumfahrtkongress 2018, 04.09.-06.09.2018, Friedrichshafen, Deutschland.

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On a vertical tailplane tangential blowing over the shoulder of a deflected rudder is applied. With large rudder deflection angle and without blowing the flow is mostly separated on the rudder. Three geometries are investigated in a numerical study with the aim to increase the side force coefficient. The first one is the baseline configuration without blowing, second a geometry with a continuous full span slot and third a geometry where discrete slots are used. With the continuous slot the separation on the rudder can be avoided completely while it is greatly reduced for the discrete slots. This is investigated for different sideslip angles. An approximately linear increase in the side force coefficient can be found until a sudden side force breakdown occurs. In a further study, the jet blowing velocity is varied. A smaller jet velocity leads to a smaller increase in the side force coefficient. Comparing the continuous and discrete slot configurations shows, that for a similar increase in the side force coefficient a much smaller mass flow rate is needed for the discrete slots. However, for jet velocities below the sonic speed the increase in the side force coefficient is limited. It can only be increased by a larger slot width in span wise direction but this comes at the expense of an increase in the required mass flow rate.

Item URL in elib:https://elib.dlr.de/121677/
Document Type:Conference or Workshop Item (Speech)
Title:Numerical Investigation of Tangential Blowing over the Rudder of a Vertical Tailplane
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Date:September 2018
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
Keywords:VTP, Vertical Tail, Active Flow Control, AFC, tangential blowing, CFD
Event Title:Deutscher Luft- und Raumfahrtkongress 2018
Event Location:Friedrichshafen, Deutschland
Event Type:national Conference
Event Dates:04.09.-06.09.2018
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 (old)
Location: Braunschweig
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Transport Aircraft
Deposited By: Kröhnert, Anna
Deposited On:02 Oct 2018 12:04
Last Modified:01 Sep 2019 03:00

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