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확산 화염 내 생성된 그을음 입자의 농도 측정에 관한 연구

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Author(s)
류명호
Issued Date
2016
Abstract
In the present study, non-intrusive technique for the concentration measurements of
soot particles formed within the flames was experimentally investigated. In the previous
investigations, the light extinction technique has been widely used to measure the
concentration of soot particles produced from the combustion process since its optical
system consists of less expensive optical components and can be easily configured
compared to other non-intrusive optical measurement systems. Although the light extinction
technique is one of the most common measurement methods for soot particle concentration
due to its ease of use and cost competitiveness, there exists some disadvantages that should
be overcame. For example, only the concentration of soot particles which is integrated
along the line path of light source can be calculated using the conventional light extinction
technique.
The local concentration and distribution of soot particles formed within the flame
(that can not be obtained from the conventional light extinction technique) are factors for a
qualitative flame analysis (that can influence the flame temperature through radiative heat
transfer process and thus the flame extinction). To overcome such disadvantages of the
conventional light extinction method, the full field light extinction apparatus (that enables
us to obtain the spatial distribution and local concentration of soot particle within the
flames) was developed and implemented as part of this study. The 3 point abel inversion algorithm was also coded using a Fortran software to recover the spatial distribution and
concentration of soot particles from the projected values obtained from the CCD camera.
The dimensionless extinction constant of soot particle is a critical parameter that is
inevitably needed to the concentration measurement of particles. In this thesis, the
dimensionless extinction constant of soot particles produced from a small laminar flame
burning kerosene was measured at the wave length of 635 nm. Measurements were fulfilled
with a Transmission Cell (TC) in which simultaneous gravimetric sampling and light
extinction techniques were employed. The measured dimensionless extinction constant for
kerosene fuel was 11.3 ± 0.3. To obtain the local concentration and distribution of soot
particles formed within the flame, laser-backlit images produced with a 635 nm light source
were captured using a CCD camera built in the full field light extinction apparatus and
digitized. From digitized laser-backlit images, projected values along the path line were
determined and deconvoluted using a 3 point abel inversion technique. The abel inversion
analysis clearly indicates that the spatial distribution of soot particles within the flame can
be faithfully reconstructed from the projected light extinction image captured by a CCD
camera.
Alternative Title
A Study of the Concentration Measurements of Soot Particles formed within Diffusion Flames
Alternative Author(s)
Myung-Ho Ryu
Affiliation
조선대학교 산업기술융합대학원 융합자동차공학과
Department
산업기술융합대학원 융합자동차공학과
Advisor
박설현
Awarded Date
2017. 2
Table Of Contents
목 차
LIST OF TABLES Ⅰ
LIST OF FIGURES Ⅱ
ABSTRACT Ⅲ
1. 서 론 1
1.1 연구배경 및 필요성 1
1.2 연구 목적 및 내용 4
2. 실험장치 및 방법 7
2.1 액적 확산화염 내 그을음 농도 측정 실험 장치 및 방법 7
2.2 그을음 입자의 무차원 광소멸계수 측정 실험 장치 및 방법 12
3. 실험결과 및 고찰 15
3.1 액적 확산화염 내 그을음 가시화 15
3.2 그을음의 무차원 광소멸계수 측정 결과 18
3.3 액적 확산화염 내 그을음 농도 계산 결과 23
4. 결 론 28
【참고문헌】29
Degree
Master
Publisher
조선대학교 산업기술융합대학원
Citation
류명호. (2016). 확산 화염 내 생성된 그을음 입자의 농도 측정에 관한 연구
Type
Dissertation
URI
https://oak.chosun.ac.kr/handle/2020.oak/1976
http://chosun.dcollection.net/common/orgView/200000266243
Appears in Collections:
Engineering > Theses(Master)(산업기술창업대학원)
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