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Modeling and analysis of fuel injection parameters for combustion and performance of an RCCI engine

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  • Nazemi, M.
  • Shahbakhti, M.

Abstract

The Reactivity Controlled Compression Ignition (RCCI) is a promising dual-fuel Low Temperature Combustion (LTC) strategy that provides a precise means for controlling the heat release rate and combustion phasing. Optimum RCCI engine operation depends on optimum selection of fuel injection parameters. In this study, a detailed 3D/Computational Fluid Dynamics (CFD) combustion model in CONVERGE CFD code is developed and validated against experimental data at different engine operating conditions. Next, the effects of fuel injection parameters on the performance and emissions characteristics of an RCCI engine are analyzed. The fuel injection parameters include spray angle, injection pressure, Start of Injection (SOI) timing, and Premixed Ratio (PR). The baseline simulation results show that a proper selection of spray angle can cause significant reduction in HC and CO emissions, while improving combustion and gross indicated efficiencies. Furthermore, decreasing injection pressure and PR along with advancing SOI timing can improve the RCCI engine’s HC and CO emissions productions. The developed CFD model is then used in an extensive computational study to determine optimum fuel injection parameters for the best RCCI engine performance. The optimization results show that spray angle 55°, SOI=−53° aTDC, 580bar injection pressure, and PR=0.76 provide the best combination of four major fuel injection parameters for the speed and load conditions studied. By choosing this set of parameters, HC and CO emissions decrease by 23% and 39% from the baseline condition while a notable improvement is observed in gross indicated and combustion efficiencies.

Suggested Citation

  • Nazemi, M. & Shahbakhti, M., 2016. "Modeling and analysis of fuel injection parameters for combustion and performance of an RCCI engine," Applied Energy, Elsevier, vol. 165(C), pages 135-150.
    • Handle: RePEc:eee:appene:v:165:y:2016:i:c:p:135-150
    DOI: 10.1016/j.apenergy.2015.11.093
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    References listed on IDEAS

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    1. Wei, Shengli & Ji, Kunpeng & Leng, Xianyin & Wang, Feihu & Liu, Xin, 2014. "Numerical simulation on effects of spray angle in a swirl chamber combustion system of DI (direct injection) diesel engines," Energy, Elsevier, vol. 75(C), pages 289-294.
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    Cited by:

    1. Han, Guopeng & Yao, Anren & Yao, Chunde & Wu, Taoyang & Wang, Bin & Wei, Hongyuan, 2017. "Mechanism analysis on controllable methanol quick combustion," Applied Energy, Elsevier, vol. 206(C), pages 558-567.
    2. Liu, Xinlei & Wang, Hu & Wang, Xiaofeng & Zheng, Zunqing & Yao, Mingfa, 2017. "Experimental and modelling investigations of the diesel surrogate fuels in direct injection compression ignition combustion," Applied Energy, Elsevier, vol. 189(C), pages 187-200.
    3. Raza, Mohsin & Wang, Hu & Yao, Mingfa, 2019. "Numerical investigation of reactivity controlled compression ignition (RCCI) using different multi-component surrogate combinations of diesel and gasoline," Applied Energy, Elsevier, vol. 242(C), pages 462-479.
    4. Razmara, M. & Bidarvatan, M. & Shahbakhti, M. & Robinett, R.D., 2016. "Optimal exergy-based control of internal combustion engines," Applied Energy, Elsevier, vol. 183(C), pages 1389-1403.
    5. Motlagh, Tara Yazdani & Azadani, Leila N. & Yazdani, Kaveh, 2020. "Multi-objective optimization of diesel injection parameters in a natural gas/diesel reactivity controlled compression ignition engine," Applied Energy, Elsevier, vol. 279(C).
    6. Li, Jing & Ling, Xiang & Liu, Deng & Yang, Wenming & Zhou, Dezhi, 2018. "Numerical study on double injection techniques in a gasoline and biodiesel fueled RCCI (reactivity controlled compression ignition) engine," Applied Energy, Elsevier, vol. 211(C), pages 382-392.
    7. Li, Zilong & Zhang, Yaoyuan & Huang, Guan & Zhao, Wenbin & He, Zhuoyao & Qian, Yong & Lu, Xingcai, 2020. "Control of intake boundary conditions for enabling clean combustion in variable engine conditions under intelligent charge compression ignition (ICCI) mode," Applied Energy, Elsevier, vol. 274(C).
    8. Asgari, Behrad & Amani, Ehsan, 2017. "A multi-objective CFD optimization of liquid fuel spray injection in dry-low-emission gas-turbine combustors," Applied Energy, Elsevier, vol. 203(C), pages 696-710.
    9. Pachiannan, Tamilselvan & Zhong, Wenjun & Rajkumar, Sundararajan & He, Zhixia & Leng, Xianying & Wang, Qian, 2019. "A literature review of fuel effects on performance and emission characteristics of low-temperature combustion strategies," Applied Energy, Elsevier, vol. 251(C), pages 1-1.
    10. Han, Weiqiang & Li, Bolun & Pan, Suozhu & Lu, Yao & Li, Xin, 2018. "Combined effect of inlet pressure, total cycle energy, and start of injection on low load reactivity controlled compression ignition combustion and emission characteristics in a multi-cylinder heavy-d," Energy, Elsevier, vol. 165(PB), pages 846-858.
    11. Fang, Cheng & Ouyang, Minggao & Tunestal, Per & Yang, Fuyuan & Yang, Xiaofan, 2018. "Closed-loop combustion phase control for multiple combustion modes by multiple injections in a compression ignition engine fueled by gasoline-diesel mixture," Applied Energy, Elsevier, vol. 231(C), pages 816-825.
    12. Ansari, Ehsan & Shahbakhti, Mahdi & Naber, Jeffrey, 2018. "Optimization of performance and operational cost for a dual mode diesel-natural gas RCCI and diesel combustion engine," Applied Energy, Elsevier, vol. 231(C), pages 549-561.
    13. Jia, Guorui & Wang, Hu & Tong, Laihui & Wang, Xiaofeng & Zheng, Zunqing & Yao, Mingfa, 2017. "Experimental and numerical studies on three gasoline surrogates applied in gasoline compression ignition (GCI) mode," Applied Energy, Elsevier, vol. 192(C), pages 59-70.
    14. Mikulski, Maciej & Bekdemir, Cemil, 2017. "Understanding the role of low reactivity fuel stratification in a dual fuel RCCI engine – A simulation study," Applied Energy, Elsevier, vol. 191(C), pages 689-708.
    15. Zheng, Zunqing & Xia, Mingtao & Liu, Haifeng & Wang, Xiaofeng & Yao, Mingfa, 2018. "Experimental study on combustion and emissions of dual fuel RCCI mode fueled with biodiesel/n-butanol, biodiesel/2,5-dimethylfuran and biodiesel/ethanol," Energy, Elsevier, vol. 148(C), pages 824-838.
    16. Ayat Gharehghani & Alireza Kakoee & Amin Mahmoudzadeh Andwari & Thanos Megaritis & Apostolos Pesyridis, 2021. "Numerical Investigation of an RCCI Engine Fueled with Natural Gas/Dimethyl-Ether in Various Injection Strategies," Energies, MDPI, vol. 14(6), pages 1-25, March.

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