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Adaptation of PIV for Application in Cryogenic Pressurized Wind Tunnel Facilities at High Reynolds Numbers

Konrath, Robert and Otter, Dirk and Geisler, Reinhard and Agocs, Janos and Mattner, Hartmut and Roosenboom, Eric and Fey, Uwe and Quest, Jürgen and Kühn, Christian (2010) Adaptation of PIV for Application in Cryogenic Pressurized Wind Tunnel Facilities at High Reynolds Numbers. 15th International Symposium on Application Laser Techniques to Fluid Mechanics, 05. - 08. Jul. 2010, Lisbon, Portugal.

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Official URL: http://ltces.dem.ist.utl.pt/lxlaser/lxlaser2010/

Abstract

A measurement system is developed for an application of Stereo-PIV in the cryogenic transonic wind tunnel of ETW to enable detailed flow field analyses on scaled models of transport aircraft at flight Mach and Reynolds numbers. The specific conditions in such wind tunnels - cryogenic gas temperatures down to 110 K and moderate gas pressures of up to 450 kPa as well as a large plenum encapsulating the test section - made specific developments necessary. This comprises the generation of suitable flow tracers for cryogenic flows considering the specific requirements for an application in the ETW as well as the provision of laser light of high pulse energy and the placement of optical components within a cryogenic environment. Optical effects due to gas density changes within the wind tunnel plenum and light beam deflections or shifts are considered in the optical design of the Cryo-PIV system. The applicability of the developed Cryo-PIV system has been recently demonstrated in the ETW during two test campaigns on a full scale and a halfwing model of a transport aircraft. The employed Stereo-PIV system and first results will be discussed.

Document Type:Conference or Workshop Item (Speech, Paper)
Title:Adaptation of PIV for Application in Cryogenic Pressurized Wind Tunnel Facilities at High Reynolds Numbers
Authors:
AuthorsInstitution or Email of Authors
Konrath, RobertUNSPECIFIED
Otter, DirkUNSPECIFIED
Geisler, ReinhardUNSPECIFIED
Agocs, JanosUNSPECIFIED
Mattner, HartmutUNSPECIFIED
Roosenboom, EricUNSPECIFIED
Fey, UweUNSPECIFIED
Quest, JürgenETW
Kühn, ChristianETW
Date:2010
Refereed publication:No
In SCOPUS:No
In ISI Web of Science:No
Volume:Paper 1572
Page Range:pp. 1-10
Series Name:Conference Proceedings on USB-Stick
Status:Published
Keywords:Particle Image Velocimetry (PIV), Stereo-PIV, cryo-PIV
Event Title:15th International Symposium on Application Laser Techniques to Fluid Mechanics
Event Location:Lisbon, Portugal
Event Type:international Conference
Event Dates:05. - 08. Jul. 2010
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Flight Physics
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Experimental Methods
Deposited By: Ilka Micknaus
Deposited On:24 Aug 2010 10:04
Last Modified:09 Nov 2010 08:46

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