Performance Evaluation of Tracer Particles for Particle Image Velocimetry Using a Scaled Rolling Road-Tire Setup in a Wind Tunnel

Search for this publication on Google Scholar
Narayan, N. (2018). Performance Evaluation of Tracer Particles for Particle Image Velocimetry Using a Scaled Rolling Road-Tire Setup in a Wind Tunnel. Unc Charlotte Electronic Theses And Dissertations.
Download PDF

Analytics

117 views ◎
82 downloads ⇓


Abstract

The ultimate goal of the present work is to evaluate the ability to produce highlyresolved particle image velocimetry (PIV) flow images of tracer particles dispersedin a wind tunnel with a scaled rolling road-tire setup. The particle type, size, anddensity impact the instantaneous velocity profile measurement uncertainty. Threetypes of tracer particles including smoke, olive oil, and helium filled soap bubbles(HFSB) were used in this study. The experimental setup consist of a 1/10th scaledslick tire on a rolling road in a 0.3 m3 test section of an open-return eiffel wind tunnelwith a free stream velocity of 11 m/s. For PIV analyses in the present work, a dualpower Nd:YAG laser in conjunction with a sCMOS camera was used to provide a laserlight sheet to illuminate particles and obtain time resolved images of the flow field inthe test section. A commercial PIV software was used to analyze images and detectvortex formation. The experiments were conducted initially without a prototype inthe wind tunnel; i.e. empty tunnel testing and then with the tire inserted into the testsection. It was found that the HFSB seeding was not providing a consistent densitythroughout the test section. Comparing the olive oil and smoke for scaled tire testing,it was found that the olive oil yielded higher resolution images as compared to thesmoke tracer particles. Hence, the tests on the case study were conducted using oliveoil and smoke. An analogous behavior obtained from the empty channel testing fortwo seeding particles was observed in conducted tests on the case study.

Details
Author

Narayan, Nithin

Title

Performance Evaluation of Tracer Particles for Particle Image Velocimetry Using a Scaled Rolling Road-Tire Setup in a Wind Tunnel

Physical Description

1 online resource (60 pages) : PDF

Date

2018

Degree Granting Institution

University of North Carolina at Charlotte

Abstract

The ultimate goal of the present work is to evaluate the ability to produce highlyresolved particle image velocimetry (PIV) flow images of tracer particles dispersedin a wind tunnel with a scaled rolling road-tire setup. The particle type, size, anddensity impact the instantaneous velocity profile measurement uncertainty. Threetypes of tracer particles including smoke, olive oil, and helium filled soap bubbles(HFSB) were used in this study. The experimental setup consist of a 1/10th scaledslick tire on a rolling road in a 0.3 m3 test section of an open-return eiffel wind tunnelwith a free stream velocity of 11 m/s. For PIV analyses in the present work, a dualpower Nd:YAG laser in conjunction with a sCMOS camera was used to provide a laserlight sheet to illuminate particles and obtain time resolved images of the flow field inthe test section. A commercial PIV software was used to analyze images and detectvortex formation. The experiments were conducted initially without a prototype inthe wind tunnel; i.e. empty tunnel testing and then with the tire inserted into the testsection. It was found that the HFSB seeding was not providing a consistent densitythroughout the test section. Comparing the olive oil and smoke for scaled tire testing,it was found that the olive oil yielded higher resolution images as compared to thesmoke tracer particles. Hence, the tests on the case study were conducted using oliveoil and smoke. An analogous behavior obtained from the empty channel testing fortwo seeding particles was observed in conducted tests on the case study.

Genre

masters theses

Subjects--Topics

Mechanical engineering
Fluid mechanics

Degree

M.S.

Keywords

Particle Image Velocimetry
Seeding
Tire Aerodynamics
Tracer Particle

Subject Area

Applied Energy & Electromechanical System

Advisor(s)

Goudarzi, Navid

Committee Members

Hewlin Jr., Rodward
Tkacik, Peter

Degree Note

Thesis (M.S.)--University of North Carolina at Charlotte, 2018.

Rights Statement

This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s). For additional information, see http://rightsstatements.org/page/InC/1.0/.

Rights Holder Information

Copyright is held by the author unless otherwise indicated.

Identifier

Narayan_uncc_0694N_11971

Permalink

http://hdl.handle.net/20.500.13093/etd:859