Sensitivity Analysis of Fuel Injection Characteristics of GDI Injector to Injector Nozzle Diameter
The accuracy of a nozzle diameter directly affects the difference of the injection characteristics between the holes and productions of a GDI (gasoline direct injection) injector. In order to reduce the difference and guarantee uniform injection characteristics, this paper carried out a CFD simulati...
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| Format: | Article |
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MDPI AG
2019-01-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/12/3/434 |
| _version_ | 1798025997071679488 |
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| author | Xinhai Li Yong Cheng Shaobo Ji Xue Yang Lu Wang |
| author_facet | Xinhai Li Yong Cheng Shaobo Ji Xue Yang Lu Wang |
| author_sort | Xinhai Li |
| collection | DOAJ |
| description | The accuracy of a nozzle diameter directly affects the difference of the injection characteristics between the holes and productions of a GDI (gasoline direct injection) injector. In order to reduce the difference and guarantee uniform injection characteristics, this paper carried out a CFD simulation of the effect of nozzle diameter which fluctuated in a small range on single-cycle fuel mass. The sensitivity of the fuel injection quantity to the injector nozzle diameter was obtained. The results showed that the liquid phase ratio at the nozzle outlet decreased and the velocity of the outlet increased with the increase of the nozzle diameter. When fluctuating in a small range of nozzle diameters, the sensitivity of the single-hole fuel mass to the nozzle diameter remained constant. The increase of the injection pressure lead to the increase of the sensitivity coefficient of the single-hole fuel mass to the nozzle diameter. The development of cavitation in the nozzle and the deviation of the fuel jet from the axis were aggravated with the increase of the injection pressure. However, the fluctuation in a small range of nozzles had little effect on the near-nozzle flow. |
| first_indexed | 2024-04-11T18:29:12Z |
| format | Article |
| id | doaj.art-db0dfe185f324f75b27c99900498073e |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-04-11T18:29:12Z |
| publishDate | 2019-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-db0dfe185f324f75b27c99900498073e2022-12-22T04:09:32ZengMDPI AGEnergies1996-10732019-01-0112343410.3390/en12030434en12030434Sensitivity Analysis of Fuel Injection Characteristics of GDI Injector to Injector Nozzle DiameterXinhai Li0Yong Cheng1Shaobo Ji2Xue Yang3Lu Wang4School of Energy and Power Engineering, Shandong University, Jinan 250061, ChinaSchool of Energy and Power Engineering, Shandong University, Jinan 250061, ChinaSchool of Energy and Power Engineering, Shandong University, Jinan 250061, ChinaSchool of Energy and Power Engineering, Shandong University, Jinan 250061, ChinaSchool of Energy and Power Engineering, Shandong University, Jinan 250061, ChinaThe accuracy of a nozzle diameter directly affects the difference of the injection characteristics between the holes and productions of a GDI (gasoline direct injection) injector. In order to reduce the difference and guarantee uniform injection characteristics, this paper carried out a CFD simulation of the effect of nozzle diameter which fluctuated in a small range on single-cycle fuel mass. The sensitivity of the fuel injection quantity to the injector nozzle diameter was obtained. The results showed that the liquid phase ratio at the nozzle outlet decreased and the velocity of the outlet increased with the increase of the nozzle diameter. When fluctuating in a small range of nozzle diameters, the sensitivity of the single-hole fuel mass to the nozzle diameter remained constant. The increase of the injection pressure lead to the increase of the sensitivity coefficient of the single-hole fuel mass to the nozzle diameter. The development of cavitation in the nozzle and the deviation of the fuel jet from the axis were aggravated with the increase of the injection pressure. However, the fluctuation in a small range of nozzles had little effect on the near-nozzle flow.https://www.mdpi.com/1996-1073/12/3/434gasoline direct injection injectornozzle diametercavitationnear-nozzle flowsensitivity coefficient |
| spellingShingle | Xinhai Li Yong Cheng Shaobo Ji Xue Yang Lu Wang Sensitivity Analysis of Fuel Injection Characteristics of GDI Injector to Injector Nozzle Diameter Energies gasoline direct injection injector nozzle diameter cavitation near-nozzle flow sensitivity coefficient |
| title | Sensitivity Analysis of Fuel Injection Characteristics of GDI Injector to Injector Nozzle Diameter |
| title_full | Sensitivity Analysis of Fuel Injection Characteristics of GDI Injector to Injector Nozzle Diameter |
| title_fullStr | Sensitivity Analysis of Fuel Injection Characteristics of GDI Injector to Injector Nozzle Diameter |
| title_full_unstemmed | Sensitivity Analysis of Fuel Injection Characteristics of GDI Injector to Injector Nozzle Diameter |
| title_short | Sensitivity Analysis of Fuel Injection Characteristics of GDI Injector to Injector Nozzle Diameter |
| title_sort | sensitivity analysis of fuel injection characteristics of gdi injector to injector nozzle diameter |
| topic | gasoline direct injection injector nozzle diameter cavitation near-nozzle flow sensitivity coefficient |
| url | https://www.mdpi.com/1996-1073/12/3/434 |
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