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Numerical study on the effects of creating rotationary flow inside the injector nozzle and changing fuel injection angle on the performance and emission of caterpillar diesel engine

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Abstract

One way of improving the performance of diesel engines is to produce modifications in the fuel supply systems. In this article, the effects of creating rotationary flow inside the nozzle and changing fuel injection angle on the performance and emission of caterpillar diesel engine have been examined in two separate stages using AVL FIRE software. First, the injector and its spray have been simulated with various geometries. The numerical results of this step indicate that creating rotationary flow inside the nozzle decreases the penetration length, while increases fuel spray cone angle and improves atomization quality. In the subsequent step, the diesel engine has been simulated with its conventional and different nozzle hole geometries and injection angles. The numerical results of this step show that the nozzle with grooves has better performance and lower emission compared to other geometries. In this case, the fuel consumption decreases by 37 percent than that of the cylindrical one, while the engine power and its torque increase by 75 percent than the cylindrical nozzle hole. In addition, the amount of nitrogen oxide (NOx) and carbon monoxide for the grooved nozzle geometry reduces by 45.45 percent and 42.73 percent, respectively, than cylindrical nozzle hole, while the soot produced during the combustion process is well oxidized.

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No data, models, or code were generated or used during the study.

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Acknowledgements

I thank the following individuals for their expertise and assistance throughout all aspects of our study and for their help in writing the manuscript (Kazem Hejranfar).

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Authors and Affiliations

  1. Department of Aerospace Engineering, Imam Ali University, Tehran, Iran

    Amir Hamzeh Farajollahi & Mohsen Rostami

  2. Department of Mechanical Engineering, Imam Khomeini International University, Qazvin, Iran

    Reza Firuzi

  3. Department of Aerospace Engineering, Sharif University of Technology, Tehran, Iran

    Amir Mardani

Authors
  1. Amir Hamzeh Farajollahi
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  2. Reza Firuzi
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  3. Mohsen Rostami
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  4. Amir Mardani
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Contributions

AHF performed the numerical simulation, analyzed the data and co-wrote the paper. RF performed the numerical simulation and co-wrote the paper. MR and AM co-wrote the paper.

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Correspondence to Amir Hamzeh Farajollahi.

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Technical Editor: Mario Eduardo Santos Martins.

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Farajollahi, A.H., Firuzi, R., Rostami, M. et al. Numerical study on the effects of creating rotationary flow inside the injector nozzle and changing fuel injection angle on the performance and emission of caterpillar diesel engine. J Braz. Soc. Mech. Sci. Eng. 44, 3 (2022). https://doi.org/10.1007/s40430-021-03306-9

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  • DOI: https://doi.org/10.1007/s40430-021-03306-9

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