\r胡春明^{1, 2}，王赫¹，王旸¹，刘娜¹

AuthorsHTML:\r胡春明^{1, 2}，王赫¹，王旸¹，刘娜¹

AuthorsListE:\rHu Chunming^{1, 2}，Wang He¹，Wang Yang¹，Liu Na¹

AuthorsHTMLE:\rHu Chunming^{1, 2}，Wang He¹，Wang Yang¹，Liu Na¹

Unit:\r1. 天津大学内燃机研究所，天津300072；
2. 天津大学内燃机燃烧学国家重点实验室，天津 300072

Unit_EngLish:\r1. Internal Combustion Engine Research Institute，Tianjin University，Tianjin 300072，China；
2. State Key Laboratory of Engines，Tianjin University，Tianjin 300072，China\r
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Abstract_Chinese:\r针对喷射截止时刻、点火提前角以及过量空气系数等影响因素，在一台自主研发的单缸试验机上，开展了煤油航空直喷发动机冷机起动燃烧特性以及相关影响因素的冷机起动敏感度分析研究．结果表明：喷射截止时刻为60°,CA BTDC、点火提前角为27°,CA～30°,CA BTDC 时，发动机容易顺利起动；过量空气系数为0.65～0.70 时，最大爆发压力循环变动率最低，失火现象消失，煤油航空直喷发动机平稳顺利起动．冷起动敏感度分析表明：敏感性强弱顺序依次是进气行程中的喷射截止时刻、过量空气系数、压缩行程中的喷射截止时刻、点火提前角．\r
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Abstract_English:\rFocusing on some factors including the end of injection，spark advance angle and excess air ratio，the investigations of cold start combustion characteristics of kerosene direct injection aviation engine and the sensitivity analysis of relevant factors were conducted on a self-developed single cylinder engine. The results show that when the end of injection is 60°,CA BTDC and spark advance angle is 27°,CA～30°,CA BTDC，the engine can be started up smoothly；when excess air ratio ranges from 0.65 to 0.70，cyclical variation of peak cylinder pressure descends to the lowest point，misfire disappears and kerosene direct injection aviation engine can be started up smoothly. Cold start sensitivity analysis shows that the strong-to-weak sequence of sensibility is the end of injection in the intake stroke，excess air ratio，the end of injection in the compression stroke and spark advance angle.\r
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Keyword_Chinese:冷起动；敏感度分析；航空煤油；活塞式航空发动机\r

Keywords_English:cold start；sensitivity analysis；aviation kerosene；piston aviation engine\r


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