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Zhao, Lingying.

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Measurement and analysis of full-scale room airflow using particle image velocimetry (PIV) techniques.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Measurement and analysis of full-scale room airflow using particle image velocimetry (PIV) techniques./
Author:	Zhao, Lingying.
Description:	152 p.
Notes:	Source: Dissertation Abstracts International, Volume: 61-05, Section: B, page: 2635.
Contained By:	Dissertation Abstracts International61-05B.
Subject:	Engineering, Agricultural. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9971238
ISBN:	9780599763784

Measurement and analysis of full-scale room airflow using particle image velocimetry (PIV) techniques.
Zhao, Lingying.

Measurement and analysis of full-scale room airflow using particle image velocimetry (PIV) techniques. - 152 p.

Source: Dissertation Abstracts International, Volume: 61-05, Section: B, page: 2635.

Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2000.

A measurement system based on Particle Image Velocimetry (PIV), with features of non-intrusive, simultaneous, and whole field measurement, was developed and applied to full-scale room airflow studies. PIV techniques can describe air velocities quantitatively and simultaneously for the whole flow field. Traditional air velocity measurements in rooms use several concurrent or sequential point measurements. For "real life" room airflow situations, which are not steady-state and uniform, it is difficult to extrapolate point velocity measurements to room airflow field information.

ISBN: 9780599763784Subjects--Topical Terms:

1019504
Engineering, Agricultural.

Measurement and analysis of full-scale room airflow using particle image velocimetry (PIV) techniques.
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100 1 $a Zhao, Lingying. $3 1923917
245 1 0 $a Measurement and analysis of full-scale room airflow using particle image velocimetry (PIV) techniques.
300 $a 152 p.
500 $a Source: Dissertation Abstracts International, Volume: 61-05, Section: B, page: 2635.
500 $a Advisers: Gerald L. Riskowski; Yuanhui Zhang.
502 $a Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2000.
520 $a A measurement system based on Particle Image Velocimetry (PIV), with features of non-intrusive, simultaneous, and whole field measurement, was developed and applied to full-scale room airflow studies. PIV techniques can describe air velocities quantitatively and simultaneously for the whole flow field. Traditional air velocity measurements in rooms use several concurrent or sequential point measurements. For "real life" room airflow situations, which are not steady-state and uniform, it is difficult to extrapolate point velocity measurements to room airflow field information.
520 $a The PIV system was tested to determine its capabilities and limitations for full-scale room airflow study. Neutrally buoyant helium filled bubbles were illuminated by a two dimensional light sheet in a full-scale ventilated room. Images of bubbles visualized in the light sheet were recorded using a photographic camera. Relatively long camera exposure time made it possible to record the bubble path in the designed time period. Then an image shift technique was used to remove the directional ambiguity. The photographic images were scanned into a computer and the flow field velocity information was automatically extracted using an image-processing program.
520 $a Image and data processing methods and related programs were developed. Statistical error analysis methods were used to remove measurement errors, fill missing data, and validate velocity data over the whole flow field. Basic flow continuity theory was used as guideline of data analysis.
520 $a Three typical swine facility ventilation systems were tested in full-scale rooms. System A was with liner inlet and outlet on opposite walls. System B and C was with inlet and outlet on same side-wall. Airflow patterns, velocity vector maps, and iso-velocity contour under various ventilation rates, thermal conditions, and ventilation settings were measured. The overall accuracy of measurement was conservatively estimated as +/-18%.
520 $a The measured quantitative velocity data can be used to evaluate ventilation equipment and system design by manufacturers, optimize performance of ventilation equipment and systems, optimize environment of animals in different ages and stages, and validate numeric models. This measurement method is part of a larger study of airflow patterns, aerosol spatial distribution, ventilation effectiveness and airborne contaminant control strategies.
590 $a School code: 0090.
650 4 $a Engineering, Agricultural. $3 1019504
690 $a 0539
710 2 0 $a University of Illinois at Urbana-Champaign. $3 626646
773 0 $t Dissertation Abstracts International $g 61-05B.
790 1 0 $a Riskowski, Gerald L., $e advisor
790 1 0 $a Zhang, Yuanhui, $e advisor
790 $a 0090
791 $a Ph.D.
792 $a 2000
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9971238