著者

小池 誠 宮川 浩 鈴置 哲典 小笠原 和人

出版者

一般社団法人 日本燃焼学会

雑誌

日本燃焼学会誌 (ISSN:13471864)

巻号頁・発行日

vol.58, no.184, pp.99-106, 2016 (Released:2018-01-26)

参考文献数

18

被引用文献数

3

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Anhydrous liquid ammonia offers a considerable advantage over hydrogen in that it has a large volumetric energy density. The total amount of energy that would be expended for its production and transportation to consumers is estimated to be less than that for liquid hydrogen transportation, even if some lower heating value is lost through chemical conversion. From a storage viewpoint, the advantages of energy density would be particularly beneficial to automobiles carrying traveling energy with them. Ammonia has some attractive thermodynamic properties for internal combustion engines as well as higher ignition temperature to mitigate knocking. Although ammonia has a low flame velocity for use in internal combustion engines, an auto-thermal-cracker providing hydrogen helps the engine to run stably. A challenge in SIP program is promoting combustion to achieve as high combustion efficiency as current gasoline combustion with minimum auxiliary fuel.

著者

大友 光彰 鈴置 哲典 山本 征治 宮川 浩

出版者

一般社団法人 日本機械学会

雑誌

日本機械学会論文集 (ISSN:21879761)

巻号頁・発行日

vol.83, no.850, pp.17-00044-17-00044, 2017 (Released:2017-06-25)

参考文献数

5

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This paper studies the condition of reducing knock intensity which is the pressure oscillation initiated by auto-ignition of the end gas. The knock intensity is thought to be decreased by suppressing the reaction rate of auto-ignition. In this study, the effect of the mixture dilution which decreases the reaction rate on the knock intensity was investigated by using a spark ignition engine. In the case of low dilution, knock was observed when the auto-ignition of the end gas occurred. When the dilution ratio was over 30%, there was the condition that the knock did not occur even if the end gas auto-ignited. The combustion with low knock intensity was observed in either case that dilution gas was inert gas or air. The knock intensity was shown as a function of the maximum temperature and the maximum pressure which affected the reaction rate although the knock intensity was affected by the composition of the mixture, load, ignition timing, auto-ignition timing of the end gas and heat release quantity of the auto-ignited mixture.