Experimental measurement of combustion instabilities in Rijke-Zhao tubes

This project aims to investigate the onset and selection of combustion-excited oscillations in uniquely configured combustion systems through experimental approaches such as thermal imaging and flow visualization. The insights gained on the behavior of such combustion systems can be used in future r...

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Main Author: Chow, Zhi Hao.
Other Authors: School of Mechanical and Aerospace Engineering
Format: Final Year Project
Language:English
Published: 2012
Subjects:
Online Access:http://hdl.handle.net/10356/50932
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-509322023-03-04T18:54:02Z Experimental measurement of combustion instabilities in Rijke-Zhao tubes Chow, Zhi Hao. School of Mechanical and Aerospace Engineering Zhao Dan DRNTU::Engineering This project aims to investigate the onset and selection of combustion-excited oscillations in uniquely configured combustion systems through experimental approaches such as thermal imaging and flow visualization. The insights gained on the behavior of such combustion systems can be used in future researches to develop control methodologies to minimize and eliminate combustion instability, or to improve efficiencies in applications such as industrial dryers and engine systems. In this paper, the theoretical concept of pulse combustion will also be explained and demonstrated. The experimental set-up consists of Rijke-Zhao tubes of various configurations, being placed vertically above a flame. The Rijke-Zhao tubes are made of quartz and they are Y-shaped, with configurations varying in terms of the branch lengths and angles. High speed camera at 20 frames per second (fps) was used to capture flow motion within the quartz tubes, while infrared camera was used to display the temperature distribution. To measure the pressure field within the tube, two arrays of microphones were strategically positioned along the upper branches. Finally, a flow anemometer and a K-type thermocouple were used to measure the flow velocity and flow temperature at the ends of the branches respectively. The results gathered were tabulated and analyzed. Bachelor of Engineering (Aerospace Engineering) 2012-12-21T07:44:08Z 2012-12-21T07:44:08Z 2012 2012 Final Year Project (FYP) http://hdl.handle.net/10356/50932 en Nanyang Technological University 101 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Engineering
spellingShingle DRNTU::Engineering
Chow, Zhi Hao.
Experimental measurement of combustion instabilities in Rijke-Zhao tubes
description This project aims to investigate the onset and selection of combustion-excited oscillations in uniquely configured combustion systems through experimental approaches such as thermal imaging and flow visualization. The insights gained on the behavior of such combustion systems can be used in future researches to develop control methodologies to minimize and eliminate combustion instability, or to improve efficiencies in applications such as industrial dryers and engine systems. In this paper, the theoretical concept of pulse combustion will also be explained and demonstrated. The experimental set-up consists of Rijke-Zhao tubes of various configurations, being placed vertically above a flame. The Rijke-Zhao tubes are made of quartz and they are Y-shaped, with configurations varying in terms of the branch lengths and angles. High speed camera at 20 frames per second (fps) was used to capture flow motion within the quartz tubes, while infrared camera was used to display the temperature distribution. To measure the pressure field within the tube, two arrays of microphones were strategically positioned along the upper branches. Finally, a flow anemometer and a K-type thermocouple were used to measure the flow velocity and flow temperature at the ends of the branches respectively. The results gathered were tabulated and analyzed.
author2 School of Mechanical and Aerospace Engineering
author_facet School of Mechanical and Aerospace Engineering
Chow, Zhi Hao.
format Final Year Project
author Chow, Zhi Hao.
author_sort Chow, Zhi Hao.
title Experimental measurement of combustion instabilities in Rijke-Zhao tubes
title_short Experimental measurement of combustion instabilities in Rijke-Zhao tubes
title_full Experimental measurement of combustion instabilities in Rijke-Zhao tubes
title_fullStr Experimental measurement of combustion instabilities in Rijke-Zhao tubes
title_full_unstemmed Experimental measurement of combustion instabilities in Rijke-Zhao tubes
title_sort experimental measurement of combustion instabilities in rijke-zhao tubes
publishDate 2012
url http://hdl.handle.net/10356/50932
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