This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Experimental Study of the Ignition Delay for Ethanol-Powered in a Rapid Compression Machine
Technical Paper
2014-36-0127
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
The period between the start of fuel injection into the combustion chamber and the start of combustion it's known as Ignition Delay (ID) or Delay Time. Delay period in the diesel engine exerts a very great influence on both engine design and performance. Functionally, the ID can be divided into two parts: the physical and chemical delay. The physical delay, it is the time between the beginning of injection and the attainment of chemical reaction conditions. During this period, the fuel is atomized, vaporized, mixed with air and raised to self-ignition temperature. Viscosity governs the physical delay of fuel combustion process, for low viscosity fuels, the physical delay tends to be small and vice versa. The chemical delay, during this period reactions start slowly and the accelerate until inflammation or ignitions takes place. Generally, chemical delay is larger than the physical delay. However, it depends on the temperatures thus physical delay becomes longer than the chemical delay. The methods to determine the ignition delay can be broadly classified into two categories: The direct and the indirect methods. Once the rapid compression machine (RCM) already has a piston with a quartz visibility window, the method adopted in the present work was based on the direct method. All tests performed in the RCM had their combustions filmed using a high speed camera. A post-processing of these images enabled us to determine with good precision in which frame the combustion was initiated. Knowing the frame that the combustion starts, the frame rate used during the films and the exact moment when the fuel was injected was possible to evaluate the ignition delay.
Authors
- Fernando Z. Sánchez - Pontifical Catholic University of Rio de Janeiro
- Carlos V. M. Braga - Pontifical Catholic University of Rio de Janeiro
- Leonardo C. Braga - Pontifical Catholic University of Rio de Janeiro
- Sergio L. Braga - Pontifical Catholic University of Rio de Janeiro
- Flávio G. Dias - PSA Peugeot Citroën do Brasil
- Franck Y. Turkovics - PSA Peugeot Citroën do Brasil
- Renata N. C. De Souza - PSA Peugeot Citroën do Brasil
Topic
Citation
Sánchez, F., Braga, C., Braga, L., Braga, S. et al., "Experimental Study of the Ignition Delay for Ethanol-Powered in a Rapid Compression Machine," SAE Technical Paper 2014-36-0127, 2014, https://doi.org/10.4271/2014-36-0127.Also In
References
- BNDE e CGEE Bioetanol de Caña de Azúcar: Energía para el desarrollo sostenible Rio de Janeiro - Brasil 2008 320
- Centro de Gestão e Estudos Estratégicos Bioetanol Combustível: Uma Oportunidade para o Brasil Brasília DF - Brasil 2009
- Yilmaz , N. , Donaldson , A. , and Johns , A. Some Perspectives on Alcohol Utilization in a Compression Ignition Engine SAE Technical Paper 2005-01-3135 2005 10.4271/2005-01-3135
- Simonsen , H. and Chomiak , J. Testing and Evaluation of Ignition Improvers for Ethanol in a DI Diesel Engine SAE Technical Paper 952512 1995 10.4271/952512
- Schaefer , A. and Hardenberg , H. Ignition Improvers for Ethanol Fuels SAE Technical Paper 810249 1981 10.4271/810249
- CENBIO - Centro Nacional de referencia em Biomassa Projeto Best - Bioetanol Para um Transporte Sustentável São Paulo - Brazil 2008
- Heywood , J. Internal Combustion Engine Fundamentals Mc Graw-Hill Book Company 1st 1988
- Shahabuddin , M. et al. Ignition delay, combustion and emission characteristics of diesel engine fueled with biodiesel Renewable and Sustainable Energy Reviews 21 623 632 2013
- Reddy , P. , Krishna , D. , Mallan , K. and Ganesan , V. Evaluation of Combustion Parameters in Direct Injection Diesel Engines - An Easy and Reliable Method SAE Technical Paper 930605 1993 10.4271/930605
- Da Silva E. and Tôrres R. Thermophysical Properties Of Diesel/Biodiesel Blends 22nd International Congress of Mechanical Engineering (COBEM 2013) São Paulo - Brasil 6577 6584 2013
- Olofsson , M. SEKAB - Polish Bioethanol as Clean Alternative for urban Heavy Transport Warsaw - Poland 2009
- Sánchez , F. , Braga , C. , Braga , L. , Braga , S. et al. Ethanol-Powered Combustion Experimental Study in a Rapid Compression Machine SAE Technical Paper 2013-36-0313 2013 10.4271/2013-36-0313