کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
11015608 | 1782157 | 2018 | 23 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Experimental analysis of super-knock occurrence based on a spark ignition engine with high compression ratio
ترجمه فارسی عنوان
تجزیه و تحلیل تجربی از رخداد فوق العاده دست انداز بر اساس موتور احتراق جرقه با نسبت فشرده سازی بالا
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کلمات کلیدی
سوپر دست کشیدن، قبل از احتراق نسبت فشرده سازی بالا، نوسان فشار، حالت های احتراق
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
انرژی (عمومی)
چکیده انگلیسی
The super-knock phenomenon is a major obstacle for further improving the power density in SI engines. The objective of this paper is to experimentally investigating the mechanism involved in the occurrence of super-knock. In this work, a high compression ratio (CRâ¯=â¯13) coupled with advanced spark timings were employed to achieving intense or critical thermal-dynamic conditions to easily inducing the super-knock. The results show that super-knock can originate from spark ignition, which is different from previous results regarding pre-ignition. Changing the spark timing super-knock can be induced with very high pressure oscillation at the present high compression ratio. The high compression ratio could generate sufficiently high thermal-dynamic conditions to inducing the abnormal combustion. In this research, four combustion phenomena were observed. The present work indicates that there is a nonlinear relationship between knock intensity and knocking onset in terms of pressure profiles at different cycles. The super-knock or knock phenomena were dominantly induced by spark ignition, which were controlled by the pre-ignition after several cycles. Finally, the analysis of the mechanism of super-knock with severe pressure oscillation was employed based on the thermal explosion theory and cavity resonances. There are two possible auto-ignition combustion modes that can induce the intense pressure oscillation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Energy - Volume 165, Part B, 15 December 2018, Pages 68-75
Journal: Energy - Volume 165, Part B, 15 December 2018, Pages 68-75
نویسندگان
Lei Zhou, Rui Kang, Haiqiao Wei, Dengquan Feng, Jianxiong Hua, Jiaying Pan, Rui Chen,