Experimental analysis and numerical modeling using lisa-ddb hybrid breakup model of direct injected gasoline spray

2003 ◽  
Vol 17 (11) ◽  
pp. 1812-1819 ◽  
Author(s):  
Sung Wook Park ◽  
Hyung Jun Kim ◽  
Chang Sik Lee
Keyword(s):  
Numerical Modeling ◽  
Experimental Analysis ◽  
Hybrid Breakup Model ◽  
Breakup Model

scholarly journals Large-eddy spray simulation under direct-injection spark-ignition engine-like conditions with an integrated atomization/breakup model

2020 ◽  
pp. 146808741988186
Author(s):  
Hongjiang Li ◽  
Christopher J Rutland ◽  
Francisco E Hernández Pérez ◽  
Hong G Im
Keyword(s):  
Direct Injection ◽  
Spark Ignition ◽  
Spark Ignition Engine ◽  
Computational Domain ◽  
Eddy Simulation ◽  
Large Eddy ◽  
Hybrid Breakup Model ◽  
Direct Injection Spark Ignition ◽  
Breakup Model ◽  
The Given

In this work, a hybrid breakup model tailored for direct-injection spark-ignition engine sprays is developed and implemented in the OpenFOAM CFD code. The model uses the Lagrangian–Eulerian approach whereby parcels of liquid fuel are injected into the computational domain. Atomization and breakup of the liquid parcels are described by two sub-models based on the breakup mechanisms reported in the literature. Evaluation of the model has been carried out by comparing large-eddy simulation results with experimental measurements under multiple direct-injection spark-ignition engine-like conditions. Spray characteristics including liquid and vapor penetration curves, droplet velocities, and Sauter mean diameter distributions are examined in detail. The model has been found to perform well for the spray conditions considered in this work. Results also show that after the end of injection, most of the residual droplets that are still in the breakup process are driven by the bag and bag–stamen breakup mechanisms. Finally, an effort to unify the breakup length parameter is made, and the given value is tested under various ambient density and temperature conditions. The predicted trends follow the measured data closely for the penetration rates, even though the model is not specifically tuned for individual cases.

Numerical modeling and experimental analysis on coupled torsional-longitudinal vibrations of a ship's propeller shaft

2017 ◽  
Vol 136 ◽  
pp. 272-282 ◽  
Author(s):  
Qianwen Huang ◽  
Xinping Yan ◽  
Yikun Wang ◽  
Cong Zhang ◽  
Zhihua Wang
Keyword(s):  
Numerical Modeling ◽  
Experimental Analysis ◽  
Propeller Shaft ◽  
Longitudinal Vibrations
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