A Detailed Study of Boost Pressure and Injection Timing on an RCCI Engine Map Fueled with Iso-Octane and N-Heptane Fuels
By using two types of different fuels and changing the ratios of these fuels, Reactivity Controlled Compression Ignition Engine (RCCI) is able to provide a more effective control over combustion phase at different loads and speeds. In a typical RCCI engine which could be considered as a type of homo...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Isfahan University of Technology
2019-01-01
|
| Series: | Journal of Applied Fluid Mechanics |
| Subjects: | |
| Online Access: | http://jafmonline.net/JournalArchive/download?file_ID=49290&issue_ID=1001 |
| _version_ | 1818207224914247680 |
|---|---|
| author | H. R. Fajri A. H. Shamekhi S. Rezaie M. J. Jafari S. A. Jazayeri |
| author_facet | H. R. Fajri A. H. Shamekhi S. Rezaie M. J. Jafari S. A. Jazayeri |
| author_sort | H. R. Fajri |
| collection | DOAJ |
| description | By using two types of different fuels and changing the ratios of these fuels, Reactivity Controlled Compression Ignition Engine (RCCI) is able to provide a more effective control over combustion phase at different loads and speeds. In a typical RCCI engine which could be considered as a type of homogeneous charge compression ignition (HCCI) engine, a low reactive fuel is injected into the intake port and a high reactive fuel is directly injected into the combustion chamber. In this study, a multi-dimensional model coupled with chemical mechanism is developed to simulate an RCCI engine operation fueled with iso-octane as the low reactive fuel and n-heptane as the high reactive one. Initially, the engine map was derived using different quantities of total above-mentioned fuels at different ratios and then engine inappropriate operating points were detected and improved by changing intake air pressure and injection timing strategies. The improved criteria to extend engine map are ringing intensity limit, NOx formation standard and gross indicated efficiency. It was concluded that high ringing intensity and NOx formation can be reduced by increasing intake air pressure; also badfire and misfire points can get improved by retarding the injection timing. |
| first_indexed | 2024-12-12T04:25:32Z |
| format | Article |
| id | doaj.art-209dad6f06df4b918b05f311cf194bda |
| institution | Directory Open Access Journal |
| issn | 1735-3572 |
| language | English |
| last_indexed | 2024-12-12T04:25:32Z |
| publishDate | 2019-01-01 |
| publisher | Isfahan University of Technology |
| record_format | Article |
| series | Journal of Applied Fluid Mechanics |
| spelling | doaj.art-209dad6f06df4b918b05f311cf194bda2022-12-22T00:38:12ZengIsfahan University of TechnologyJournal of Applied Fluid Mechanics1735-35722019-01-0112411611175.A Detailed Study of Boost Pressure and Injection Timing on an RCCI Engine Map Fueled with Iso-Octane and N-Heptane FuelsH. R. Fajri0A. H. Shamekhi1S. Rezaie2M. J. Jafari3S. A. Jazayeri4Department of Mechanical Engineering, K. N. Toosi University of Technology, 470 Mirdamad Ave. West, 19697, Tehran, IranDepartment of Mechanical Engineering, K. N. Toosi University of Technology, 470 Mirdamad Ave. West, 19697, Tehran, IranDepartment of Mechanical Engineering, Semnan University, 19111-35131, Semnan, IranDepartment of Mechanical Engineering, K. N. Toosi University of Technology, 470 Mirdamad Ave. West, 19697, Tehran, IranDepartment of Mechanical Engineering, K. N. Toosi University of Technology, 470 Mirdamad Ave. West, 19697, Tehran, IranBy using two types of different fuels and changing the ratios of these fuels, Reactivity Controlled Compression Ignition Engine (RCCI) is able to provide a more effective control over combustion phase at different loads and speeds. In a typical RCCI engine which could be considered as a type of homogeneous charge compression ignition (HCCI) engine, a low reactive fuel is injected into the intake port and a high reactive fuel is directly injected into the combustion chamber. In this study, a multi-dimensional model coupled with chemical mechanism is developed to simulate an RCCI engine operation fueled with iso-octane as the low reactive fuel and n-heptane as the high reactive one. Initially, the engine map was derived using different quantities of total above-mentioned fuels at different ratios and then engine inappropriate operating points were detected and improved by changing intake air pressure and injection timing strategies. The improved criteria to extend engine map are ringing intensity limit, NOx formation standard and gross indicated efficiency. It was concluded that high ringing intensity and NOx formation can be reduced by increasing intake air pressure; also badfire and misfire points can get improved by retarding the injection timing.http://jafmonline.net/JournalArchive/download?file_ID=49290&issue_ID=1001RCCI engine; Iso-octane; N-heptane; Injection timing; Intake air pressure. |
| spellingShingle | H. R. Fajri A. H. Shamekhi S. Rezaie M. J. Jafari S. A. Jazayeri A Detailed Study of Boost Pressure and Injection Timing on an RCCI Engine Map Fueled with Iso-Octane and N-Heptane Fuels Journal of Applied Fluid Mechanics RCCI engine; Iso-octane; N-heptane; Injection timing; Intake air pressure. |
| title | A Detailed Study of Boost Pressure and Injection Timing on an RCCI Engine Map Fueled with Iso-Octane and N-Heptane Fuels |
| title_full | A Detailed Study of Boost Pressure and Injection Timing on an RCCI Engine Map Fueled with Iso-Octane and N-Heptane Fuels |
| title_fullStr | A Detailed Study of Boost Pressure and Injection Timing on an RCCI Engine Map Fueled with Iso-Octane and N-Heptane Fuels |
| title_full_unstemmed | A Detailed Study of Boost Pressure and Injection Timing on an RCCI Engine Map Fueled with Iso-Octane and N-Heptane Fuels |
| title_short | A Detailed Study of Boost Pressure and Injection Timing on an RCCI Engine Map Fueled with Iso-Octane and N-Heptane Fuels |
| title_sort | detailed study of boost pressure and injection timing on an rcci engine map fueled with iso octane and n heptane fuels |
| topic | RCCI engine; Iso-octane; N-heptane; Injection timing; Intake air pressure. |
| url | http://jafmonline.net/JournalArchive/download?file_ID=49290&issue_ID=1001 |
| work_keys_str_mv | AT hrfajri adetailedstudyofboostpressureandinjectiontimingonanrccienginemapfueledwithisooctaneandnheptanefuels AT ahshamekhi adetailedstudyofboostpressureandinjectiontimingonanrccienginemapfueledwithisooctaneandnheptanefuels AT srezaie adetailedstudyofboostpressureandinjectiontimingonanrccienginemapfueledwithisooctaneandnheptanefuels AT mjjafari adetailedstudyofboostpressureandinjectiontimingonanrccienginemapfueledwithisooctaneandnheptanefuels AT sajazayeri adetailedstudyofboostpressureandinjectiontimingonanrccienginemapfueledwithisooctaneandnheptanefuels AT hrfajri detailedstudyofboostpressureandinjectiontimingonanrccienginemapfueledwithisooctaneandnheptanefuels AT ahshamekhi detailedstudyofboostpressureandinjectiontimingonanrccienginemapfueledwithisooctaneandnheptanefuels AT srezaie detailedstudyofboostpressureandinjectiontimingonanrccienginemapfueledwithisooctaneandnheptanefuels AT mjjafari detailedstudyofboostpressureandinjectiontimingonanrccienginemapfueledwithisooctaneandnheptanefuels AT sajazayeri detailedstudyofboostpressureandinjectiontimingonanrccienginemapfueledwithisooctaneandnheptanefuels |