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Experimental study on the combustion, emissions and fuel consumption of elliptical nozzle diesel engine

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  • Jia, Hekun
  • Jian, Yi
  • Yin, Bifeng
  • Yang, Junfeng
  • Liu, Zhiyuan

Abstract

A series of experiments are carried out to investigate the combustion, emissions characteristics and fuel consumption of a diesel engine equipped with elliptical nozzle. The elliptical holes, which are made with an aspect ratio of 1.5, have a similar flow area as that of the references. In-cylinder pressure, exhaust emissions and fuel consumption are measured with varied fuel injection timing under a constant speed and different loads. The elliptical nozzles are characterized by shorter ignition delays, lower maximum rates of heat release and in-cylinder average temperature, and longer combustion durations. The NOx emission of the ICE with an elliptical nozzle is lower and while Soot emission higher. Under variable fuel injection timing, the NOx-Soot trade-off are affected by the nozzle shape. A substantial improvement in the fuel consumption-NOx emission trade-off is obtained for elliptic nozzles at three different loads. Employing moderate earlier injection couple with elliptical nozzle can reduce fuel consumption 2.5% while NOx and Soot emission remain unchanged at 25% load, and NOx emission reduce by 8.3% and 12.7%, and Soot emission reduce by 5.7% and 10.9%, and fuel consumption reduce by 2.4% and 1.7% at 50% and 75% load respectively.

Suggested Citation

  • Jia, Hekun & Jian, Yi & Yin, Bifeng & Yang, Junfeng & Liu, Zhiyuan, 2023. "Experimental study on the combustion, emissions and fuel consumption of elliptical nozzle diesel engine," Energy, Elsevier, vol. 262(PB).
    • Handle: RePEc:eee:energy:v:262:y:2023:i:pb:s0360544222023313
    DOI: 10.1016/j.energy.2022.125449
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    References listed on IDEAS

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    1. Yu, Shenghao & Yin, Bifeng & Chen, Chen & Jia, Hekun & Wang, Weifeng, 2023. "A comparative analysis of internal flow and spray characteristics in triangular orifices with diesel and biodiesel," Energy, Elsevier, vol. 285(C).

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