Experience

• VTF ignition system model

The VTF ignition system model consists of several submodels, including models for electrical circuitry, arc, ignition and combustion. The electrical circuitry model is employed to describe the current, voltage, electrical energy of ignition coil, the spark plug, and air column. The arc is modeled using a set of Lagrangian particles. The animations below show how the spark plug orientation affects flame kernel growth, arc development, and flame propagation.

• Optimization of a HSDI diesel engine for passenger car

• Simultaneous optimization of multiple operating conditions for diesel engine

• Coupling scaling laws and genetic algorithm for diesel engine development

• Development of mesh-independent spray models 

• Development of a two-zone G-equation model for SI engine combustion

without multi-grid model

with two-zone multi-grid model

• Development of improved parameterization method for piston bowl

• Development of a flash boiling model for GDI SI engines 

• Development of a two-step combustion model for gasoline combustion

• Development of standard processes for 3D combustion CFD for one OEM

• Development of standard processes for conjugated heat transfer for one OEM

• 1D/3D coupling for SI engine combustion simulation

• Simulation of off-centered swirl and its effects on combustion

• Simulation of fuel film and propagation flame interaction 

• Implementation of advanced spray models and combustion models into KIVA4 

• Implementation of advanced spray models and combustion models into KIVA-hpFE

• Simulation of high-pressure direct-injection natural gas engine

• Simulation of turbulent jet ignition in a rapid compression machine

Both LES and RANS have been employed to investigate the ignition mechanism in the main chamber of turbulent jet ignition in a rapid compression machine.

• Simulation of diesel engine combustion

• Simulation of SI engine combustion

• Simulation of transient breath processes 

• Oil jet cooling for permanent magnetic actuator

• Simulation of jet flow and flames

• Simulation of an annular multiple injector combustor

Both LES and RANS have been used to simulate ignition and flame propagation processes in an annular multiple injector combustor. Detailed mechanism and 2-step mechanism are considered.

• Simulation of premixed flame stabilized by a bluff-body

• Simulation of fan-driven flow

• high-temperature performance and thermal runaway of Li-ion batteries

Simulation shows that the maximum temperature of the battery occurs at the interface of the cylindrical region and battery region.

effects of chemical kinetics on thermal runaway