Numerical investigation of CAI Combustion in the Opposed-Piston Engine with Direct and Indirect Water Injection

Rafał Pyszczek , Paweł Mazuro , Andrzej Teodorczyk

Abstract

This paper is focused on the CAI combustion control in a turbocharged 2-stroke Opposed-Piston (OP) engine. The barrel type OP engine arrangement is of particular interest for the authors because of its robust design, high mechanical efficiency and relatively easy incorporation of a Variable Compression Ratio (VCR). The other advantage of such design is that combustion chamber is formed between two moving pistons – there is no additional cylinder head to be cooled which directly results in an increased thermal efficiency. Furthermore, engine operation in a Controlled Auto-Ignition (CAI) mode at high compression ratios (CR) raises a possibility of reaching even higher efficiencies and very low emissions [1]. In order to control CAI combustion such measures as VCR and water injection were considered for indirect ignition timing control. Numerical simulations of the scavenging and combustion processes were performed with the 3D CFD multipurpose AVL Fire solver. Numerous cases were calculated with different engine compression ratios and different amounts of directly or indirectly injected water. The influence of the VCR and water injection on the ignition timing and engine performance was determined and their application in the real engine was discussed
Author Rafał Pyszczek ITC
Rafał Pyszczek,,
- The Institute of Heat Engineering
, Paweł Mazuro ITC
Paweł Mazuro,,
- The Institute of Heat Engineering
, Andrzej Teodorczyk ITC
Andrzej Teodorczyk,,
- The Institute of Heat Engineering
Pages0-12083
Publication size in sheets604.15
Book Brzezanski Marek, Mitianiec Wladyslaw (eds.): Scientific Conference on Automotive Vehicles and Combustion Engines (KONMOT 2016), 2016, IOP Conference Series: Materials Science and Engineering, ISBN 9781510830547, 833 p., DOI:10.1088/1757-899X/148/1/012057
Keywords in PolishSpalanie, Silniki Opposed-Piston, wtrysk wody, zmienny stopień sprężania, kontrolowany samozapłon, HCCI
Keywords in EnglishCombustion, Opposed-Piston, Water Injection, CAI, HCCI, VCR, CFD
Abstract in Polishbrak
DOIDOI:10.1088/1757-899X/148/1/012083
URL http://iopscience.iop.org/article/10.1088/1757-899X/148/1/012083
Languageen angielski
Score (nominal)15
ScoreMinisterial score = 15.0, 15-09-2017, BookChapterMatConf
Ministerial score (2013-2016) = 15.0, 15-09-2017, BookChapterMatConf
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