Spray-Wall Interactions in a Small-Bore, Multi-Cylinder Engine Operating With Reactivity-Controlled Compression Ignition [electronic resource]
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| Online Access: |
Full Text (via OSTI) |
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| Format: | Government Document Electronic eBook |
| Language: | English |
| Published: |
Washington, D.C. : Oak Ridge, Tenn. :
United States. Department of Energy. ; distributed by the Office of Scientific and Technical Information, U.S. Department of Energy,
2017.
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| Abstract: | Experimental work on reactivity-controlled compression ignition (RCCI) in a small-bore, multi-cylinder engine operating on premixed iso-octane and direct-injected n-heptane has shown an unexpected combustion phasing advance at early injection timings, which has not been observed in large-bore engines operating under RCCI at similar conditions. In this work, computational fluid dynamics (CFD) simulations were performed to investigate whether spray-wall interactions could be responsible for this result. Comparison of the spray penetration, fuel film mass, and in-cylinder visualization of the spray from the CFD results to the experimentally measured combustion phasing and emissions provided compelling evidence of strong fuel impingement at injection timings earlier than -90 crank angle degrees (°CA) after top dead center (aTDC), and transition from partial to full impingement between -65 and -90°CA aTDC. Based on this evidence, explanations for the combustion phasing advance at early injection timings are proposed along with potential verification experiments. |
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| Item Description: | Published through SciTech Connect. 10/15/2017. Proceedings of the Technical Conference of the ASME Internal Combusion Engine Division 1 none ISSN 1524-9433; ISBN; 978-0-7918-5831-8. ASME 2017 Internal Combustion Engine Division Fall Technical Conference , Seattle, Washington, United States of America, 10/15/2017 4:00:00 AM-10/18/2017 4:00:00 AM. Wissink, Martin; Curran, Scott; Kavuri, Chaitanya; Kokjohn, Sage. |
| Physical Description: | V001T03A010 : digital, PDF file. |