Combustion Characteristics Coupled with Direct Water Injection through Double-Needle Type Injector
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Accession number;07A0040599
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| Title;Combustion Characteristics Coupled with Direct Water Injection through Double-Needle Type Injector |
| Author;
TAJIMA HIROSHI
(Kyushu Univ., Jpn)
STROM ALEXANDER
(Kyushu Univ., Jpn)
HIROTA KAZUHITO
(Kyushu Univ., Jpn)
NARUSE YUICHI
(Kyushu Univ., Jpn)
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Journal Title;Marine Engineering
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Journal Code:S0651A
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ISSN:1346-1427
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VOL.42;NO.1;PAGE.137-144,IV-V(2007)
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| Figure&Table&Reference;FIG.10, TBL.4, REF.6 |
| Pub. Country;Japan |
| Language;English |
| Abstract;Direct water injection (DWI) seems to be a promising solution for NOx reductions from marine diesels thanks to its wide flexibility in water injection. Its true potential, however, remains uncertain because both numerical and experimental investigations are necessary to determine the best injection pattern, which can balance greater NOx reduction and less thermal efficiency loss especially for two-stroke diesel engines with peripheral injector location. In this study, a double-needle single-injector type DWI system was tested in a two-stroke engine with peripheral injector layout to evaluate its NOx reduction capability under the existence of swirling flow. Its effect on flame temperature was investigated experimentally by flame temperature measurement and numerically by CFD simulation. It was found that injected water affected fuel spray penetration and its air entrainment around spray tip. For tested engine configuration, it is found simultaneous fuel and water injection was most effective in reducing NOx emission. (author abst.) |
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