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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

Farajollahi, A. H ; Sharif University of Technology | 2022

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  1. Type of Document: Article
  2. DOI: 10.1007/s40430-021-03306-9
  3. Publisher: Springer Science and Business Media Deutschland GmbH , 2022
  4. Abstract:
  5. 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. © 2021, The Author(s), under exclusive licence to The Brazilian Society of Mechanical Sciences and Engineering
  6. Keywords:
  7. Diesel engine performance ; Emissions ; Grooves ; Rotationary flow ; Carbon monoxide ; Fuel injection ; Fuels ; Geometry ; Nitrogen oxides ; Spray nozzles ; Emission ; Fuel injection angle ; Groove ; Injector nozzle ; Injector nozzle geometry ; Nozzle geometries ; Nozzle holes ; Performance and emissions ; Diesel engines
  8. Source: Journal of the Brazilian Society of Mechanical Sciences and Engineering ; Volume 44, Issue 1 , 2022 ; 16785878 (ISSN)
  9. URL: https://link.springer.com/article/10.1007/s40430-021-03306-9