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論文
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椎名, 亮介 ; 荒木, 幹也 ; CHEN, Lai ; 中村, 壽雄 ; 志賀, 聖一 ; 小保方, 富夫
概要:
application/pdf<br />Journal Article<br />This paper presents basic combustion characteristics of a spark-ignition engine fuelled with three kinds of gaseous fuels; H_2, CO and CH_4. A single-cylinder engine was operated under WOT at
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1500min^<-1> condition. CO gas gives lower thermal efficiency than H_2 and CH_4, since the energy of the fuel can not be transferred to the pressure or the work, although it gives higher combustion temperature which makes the higher exhaust gas temperature and much higher NO_x emissions than those for CH_4. H_2 gives upper limit of flammability due to the occurrence of backfire and almost comparable thermal efficiency with that for CH_4 at its stoichiometric condition.
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論文 |
論文
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椎名, 亮介 ; 荒木, 幹也 ; CHEN, Lai ; 中村, 壽雄 ; 志賀, 聖一 ; 小保方, 富夫
概要:
application/pdf<br />Journal Article<br />This paper presents basic combustion characteristics of a spark-ignition engine fuelled with three kinds of gaseous fuels; H_2, CO and CH_4. A single-cylinder engine was operated under WOT at
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1500min^<-1> condition. CO gas gives lower thermal efficiency than H_2 and CH_4, since the energy of the fuel can not be transferred to the pressure or the work, although it gives higher combustion temperature which makes the higher exhaust gas temperature and much higher NO_x emissions than those for CH_4. H_2 gives upper limit of flammability due to the occurrence of backfire and almost comparable thermal efficiency with that for CH_4 at its stoichiometric condition.
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論文
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林田, 守正 ; 成澤, 和幸 ; 倉嶌, 大輔 ; 紙屋, 雄史
概要:
application/pdf<br />Journal Article<br />The driving conditions of suburban transit buses were investigated with a chartered bus. Based on this data, a series hybrid system was designed for transit buses from the viewpoint of the
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acceleration performance and the energy saving. In order to measure the electric energy flow on board, the dynamometer bench tests and the static simulated experiments were carried out with storage batteries and ultra capacitors. It was clarified that the charge discharge loss in the storage devices can be estimated by the calculation using the internal resistance and current. And, the energy efficiency of the series hybrid system was evaluated in compared with conventional engine-powered buses for a trial.
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論文
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INADA, Shigeaki ; YANG, Wen Jei ; SONG, Jun
概要:
application/pdf<br />Journal Article<br />A theoretical analysis of impact dynamics and heat transfer is performed on single, deformable, saturated drops to determine heat transfer effectiveness, using idealized shapes to model the
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deformation. Numerical results are obtained for various liquid drops in the nonwetting regime with diameters of 0.22 to 4.0 mm, wall superheat temperatures of 200 to 600 K and Weber numbers of 12.3 to 50. The drop heat transfer effectiveness is expressed in the form of a correlation equation of four dimensionless parameters, including Weber, Bond and Prandtl numbers, and a new parameter which can be interpreted as the ratio of the inertial force induced by the accelerating vapor flow inside the superheated vapor layer to the elastic restitution force of the drop itself due to surface tension forces. The correlation equation agrees well with the existing experimental data in the absence of air entrainment and drop subcooling.
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