Fuel Spray Simulation of High-Pressure Swirl-Injector for DISI Engines and Comparison with Laser Diagnostic Measurements

2003 ◽  
Author(s):  
Christos A. Chryssakis ◽  
Dennis N. Assanis ◽  
Jee-Kuen Lee ◽  
Keiya Nishida
Keyword(s):  
High Pressure ◽  
Fuel Spray ◽  
Laser Diagnostic ◽  
Swirl Injector ◽  
Pressure Swirl

Experimental and numerical study of high-pressure-swirl injector sprays in a direct injection gasoline engine

2005 ◽  
Vol 219 (8) ◽  
pp. 617-629 ◽  
Author(s):  
J Gao ◽  
D Jiang ◽  
Z Huang ◽  
X Wang
Keyword(s):  
High Pressure ◽  
Direct Injection ◽  
Fuel Spray ◽  
Spray Characteristics ◽  
Engine Operation ◽  
Injection Condition ◽  
Partial Load ◽  
Swirl Injector ◽  
Gdi Engine ◽  
Pressure Swirl

The characteristics of free spray of a new type high-pressure-swirl injector in gasoline direct injection (GDI) engine under various injection conditions are investigated. The fuel spray with hollow-cone structure, wide spreading, and large spray angle is observed under the injection condition simulating to the GDI engine operation at full load. The study shows that a vortex structure can be clearly observed in the periphery of the spray. Meanwhile, an initial spray slug also appears at the tip of the main spray. Under the injection condition of GDI engine partial load, the structure of fuel spray changes into the more compact and solid-cone shape with decreased spray width. Moreover, the influences of the injection pressures and ambient pressures on the spray characteristics of the injector are studied. Along with the experimental studies, a general numerical model for the swirl spray is developed. Then, the model is implemented into a multi-dimensional computational fluid dynamics code (KIVA-3V) to theoretically study the pressure-swirl injector sprays. Comparisons between the computed and measured spray characteristics such as spray structure, spray tip penetration, and droplet sizes are made, and good agreement has been achieved between the model prediction and measurement.

PIV Measurements of High-Pressure Swirl Injector Spray near Nozzle Exit for GDI engine

2003 ◽  
Vol 2003.3 (0) ◽  
pp. 49-50
Author(s):  
Nobuyuki KAWAHARA ◽  
Eiji TOMITA ◽  
Daisuke FUKUDA
Keyword(s):  
High Pressure ◽  
Nozzle Exit ◽  
Piv Measurements ◽  
Swirl Injector ◽  
Gdi Engine ◽  
Pressure Swirl

CHARACTERIZATION OF PROTOTYPE HIGH-PRESSURE SWIRL INJECTOR NOZZLES, PART II: CFD EVALUATION OF INTERNAL FLOW

2000 ◽  
Vol 10 (2) ◽  
pp. 19 ◽  
Author(s):  
Changsoo Jang ◽  
Choongsik Bae ◽  
Sangmin Choi
Keyword(s):  
High Pressure ◽  
Internal Flow ◽  
Swirl Injector ◽  
Pressure Swirl

Performance of Prototype High Pressure Swirl Injector Nozzles for Gasoline Direct Injection

1999 ◽  
Author(s):  
Changsoo Jang ◽  
Sangmin Choi ◽  
Choongsik Bae ◽  
Jooyoung Kim ◽  
Seungkook Baik
Keyword(s):  
High Pressure ◽  
Direct Injection ◽  
Gasoline Direct Injection ◽  
Swirl Injector ◽  
Pressure Swirl
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