HCCI modelling progress

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HCCI modelling progress

• Sebastian Mosbach
• 20 March 2007

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The CoMo group at Cambridge

• Founded in 1999

• Headed by Dr. Markus Kraft

• Currently 22 members

• Areas of application

Engines
Nanoparticles
Particle processes

• Novel methods Numerics, CFD, Quantum Chemistry,
  etc.

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Dual Injection HCCI

• Effect of charge stratification on maximum
  pressure rise rates

• Z. Wang, J.-X. Wang

Int. J. Eng. Res., Feb. 2007
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Dual Injection HCCI

• Evaporation of liquid fuel

• Gaseous fuel mass fraction

Int. J. Eng. Res., Feb. 2007
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Dual Injection HCCI

• Parameter dependence of charge stratification
  level

Int. J. Eng. Res., Feb. 2007
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Dual Injection HCCI

• Higher stratification levels

• Evolution of fluid parcels

Int. J. Eng. Res., Feb. 2007
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Partial charge stratification

• Future work Prediction of soot aggregates

• Particle size distributions

• Aggregate morphology

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Real-time transient simulation

• M. Sjöberg, J. Dec

• Studies of transient engine operation, control,
  DOE, and optimization involve simulations over
  many cycles

• Problem Computational expense

• Solution Storage/retrieval

• Full-cycle 1D CFD, GT-Power 6.2

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Example Transient control
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Example Transient control
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Example Transient control
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Example Transient control

• Live simulation