Experimental Study on Local Flame Properties of Hydrogen Added Hydrocarbon Premixed Turbulent Flames
This experimental study is performed to investigate directly the local flame properties of turbulent propagating flames at the same weak turbulence condition (u'/SL0=1.4), in order to clarify basically the influence of the addition of hydrogen to lean and rich methane or propane mixtures on...
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| Format: | Article |
| Language: | English |
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The Japan Society of Mechanical Engineers
2009-06-01
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| Series: | Journal of Thermal Science and Technology |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/jtst/4/1/4_1_190/_pdf/-char/en |
| _version_ | 1819205328368041984 |
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| author | Masaya NAKAHARA Takamori SHIRASUNA Jun HASHIMOTO |
| author_facet | Masaya NAKAHARA Takamori SHIRASUNA Jun HASHIMOTO |
| author_sort | Masaya NAKAHARA |
| collection | DOAJ |
| description | This experimental study is performed to investigate directly the local flame properties of turbulent propagating flames at the same weak turbulence condition (u'/SL0=1.4), in order to clarify basically the influence of the addition of hydrogen to lean and rich methane or propane mixtures on its local burning velocity. The mixtures having nearly the same laminar burning velocity with different rates of addition of hydrogen δH are prepared. A two-dimensional sequential laser tomography technique is used to obtain the relationship between the flame shape and the flame displacement in a constant-volume vessel. Some of the key parameters of local flame properties quantitatively measured are the local flame displacement velocity SF, curvature and stretch of turbulent flames. Additionally, the Markstein number Ma was obtained from outwardly propagating spherical laminar flames, in order to examine the effect of positive stretch on burning velocity. It was found that the trends of the mean values of measured SF with respect to δH, the total equivalence ratio Φ and fuel types corresponded well its turbulent burning velocity. The trend of the obtained Ma could explain the SF of turbulent flames only qualitatively. The local burning velocity at the part of turbulent flames with positive stretch and curvature using this Ma, SLt, attempted to be estimated quantitatively. As a result, a quantitative relationship between the estimated SLt and the SF at positive stretch and curvature of turbulent flames could be observed only for mixtures with Le > 1 or Ma >0. |
| first_indexed | 2024-12-23T04:49:57Z |
| format | Article |
| id | doaj.art-b457de054a3240248939cee418c207b5 |
| institution | Directory Open Access Journal |
| issn | 1880-5566 |
| language | English |
| last_indexed | 2024-12-23T04:49:57Z |
| publishDate | 2009-06-01 |
| publisher | The Japan Society of Mechanical Engineers |
| record_format | Article |
| series | Journal of Thermal Science and Technology |
| spelling | doaj.art-b457de054a3240248939cee418c207b52022-12-21T17:59:29ZengThe Japan Society of Mechanical EngineersJournal of Thermal Science and Technology1880-55662009-06-014119020110.1299/jtst.4.190jtstExperimental Study on Local Flame Properties of Hydrogen Added Hydrocarbon Premixed Turbulent FlamesMasaya NAKAHARA0Takamori SHIRASUNA1Jun HASHIMOTO2Ehime UniversityKyushu UniversityTsuyama National College of TechnologyThis experimental study is performed to investigate directly the local flame properties of turbulent propagating flames at the same weak turbulence condition (u'/SL0=1.4), in order to clarify basically the influence of the addition of hydrogen to lean and rich methane or propane mixtures on its local burning velocity. The mixtures having nearly the same laminar burning velocity with different rates of addition of hydrogen δH are prepared. A two-dimensional sequential laser tomography technique is used to obtain the relationship between the flame shape and the flame displacement in a constant-volume vessel. Some of the key parameters of local flame properties quantitatively measured are the local flame displacement velocity SF, curvature and stretch of turbulent flames. Additionally, the Markstein number Ma was obtained from outwardly propagating spherical laminar flames, in order to examine the effect of positive stretch on burning velocity. It was found that the trends of the mean values of measured SF with respect to δH, the total equivalence ratio Φ and fuel types corresponded well its turbulent burning velocity. The trend of the obtained Ma could explain the SF of turbulent flames only qualitatively. The local burning velocity at the part of turbulent flames with positive stretch and curvature using this Ma, SLt, attempted to be estimated quantitatively. As a result, a quantitative relationship between the estimated SLt and the SF at positive stretch and curvature of turbulent flames could be observed only for mixtures with Le > 1 or Ma >0.https://www.jstage.jst.go.jp/article/jtst/4/1/4_1_190/_pdf/-char/enturbulent propagating flamehydrogen added hydrocarbonlocal burning velocitymarkstein numberpreferential diffusionlewis number |
| spellingShingle | Masaya NAKAHARA Takamori SHIRASUNA Jun HASHIMOTO Experimental Study on Local Flame Properties of Hydrogen Added Hydrocarbon Premixed Turbulent Flames Journal of Thermal Science and Technology turbulent propagating flame hydrogen added hydrocarbon local burning velocity markstein number preferential diffusion lewis number |
| title | Experimental Study on Local Flame Properties of Hydrogen Added Hydrocarbon Premixed Turbulent Flames |
| title_full | Experimental Study on Local Flame Properties of Hydrogen Added Hydrocarbon Premixed Turbulent Flames |
| title_fullStr | Experimental Study on Local Flame Properties of Hydrogen Added Hydrocarbon Premixed Turbulent Flames |
| title_full_unstemmed | Experimental Study on Local Flame Properties of Hydrogen Added Hydrocarbon Premixed Turbulent Flames |
| title_short | Experimental Study on Local Flame Properties of Hydrogen Added Hydrocarbon Premixed Turbulent Flames |
| title_sort | experimental study on local flame properties of hydrogen added hydrocarbon premixed turbulent flames |
| topic | turbulent propagating flame hydrogen added hydrocarbon local burning velocity markstein number preferential diffusion lewis number |
| url | https://www.jstage.jst.go.jp/article/jtst/4/1/4_1_190/_pdf/-char/en |
| work_keys_str_mv | AT masayanakahara experimentalstudyonlocalflamepropertiesofhydrogenaddedhydrocarbonpremixedturbulentflames AT takamorishirasuna experimentalstudyonlocalflamepropertiesofhydrogenaddedhydrocarbonpremixedturbulentflames AT junhashimoto experimentalstudyonlocalflamepropertiesofhydrogenaddedhydrocarbonpremixedturbulentflames |