Sensitivity Analysis of Injection Mass Flow to the Inlet Orifice Radius of a GDI Injector Nozzle
Abstract
:1. Introduction
2. Object Description and Validation
- (1)
- Cavitation model
3. Results and Discussion
3.1. The Injection Process of the Injector Nozzle Called “Spray G”
3.2. The Effect of Inlet Orifice Radius of the GDI Injector on the Injection Characteristic
3.3. Sensitivity Analysis of Fuel Mass to Inlet Orifice Radius
3.4. Effect of Inlet Orifice Radius on the Near-Nozzle Flow Characteristic
4. Conclusions
Author Contributions
Funding
Data Availability Statement
Conflicts of Interest
Nomenclature
GDI | gasoline direct injection |
inlet velocity of the CFD model | |
outlet velocity of the injector nozzle | |
pin | injection pressure |
pback | back pressure |
pv | saturated vapor pressure |
injector nozzle mass flow | |
Cd | the discharge coefficient |
Sr | sensitivity coefficient |
Δd | the change in inlet orifice radius |
CN | cavitation number |
ξ | local resistant coefficient |
hl | local resistance |
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Type | Value | Type | Value |
---|---|---|---|
Injector | GDI injector | Fuel | Gasoline |
Nozzle number | 6 | Density | 0.7–0.78 kg/m3 |
d | 0.15 mm | Dynamic viscosity | 0.76 mm2/s |
L1 | 0.15 mm | BND_inlet | 15, 25 and 35 MPa |
D | 0.45 mm | BND_Outlet | 0.5 MPa |
L2 | 0.45 mm | Temperature | 293.7 K |
R | 0.04 mm | Needle_moving | Move |
α | 35° | Symmetry | Periodic |
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Li, X.; Guo, J.; Shen, B.; Zhang, P. Sensitivity Analysis of Injection Mass Flow to the Inlet Orifice Radius of a GDI Injector Nozzle. Processes 2024, 12, 1740. https://doi.org/10.3390/pr12081740
Li X, Guo J, Shen B, Zhang P. Sensitivity Analysis of Injection Mass Flow to the Inlet Orifice Radius of a GDI Injector Nozzle. Processes. 2024; 12(8):1740. https://doi.org/10.3390/pr12081740
Chicago/Turabian StyleLi, Xinhai, Jian Guo, Bing Shen, and Peijie Zhang. 2024. "Sensitivity Analysis of Injection Mass Flow to the Inlet Orifice Radius of a GDI Injector Nozzle" Processes 12, no. 8: 1740. https://doi.org/10.3390/pr12081740