STAR-CCM+

Automatic gasket tuning optimization algorithms

The cooling system has a key role in the design process of diesel engines: it allows the survival and the durability of the hottest components; also, performances and emissions are related to its efficiency.

Main aim of the system is to prevent cracks and thermal fatigue stress in base engine components: head and block first of all; for these components, a fluid core (cooling jacket) surrounds the hot surfaces related to the combustion and has to be designed as a main component of the system.

Complete engine thermal model

Thermal management has become a crucial issue in the design of modern vehicles. On one side, with high specific power outputs, the amount of excess heat to be disposed of is a serious challenge for vehicle reliability. On the other hand, at ordinary use, the excess heat available is limited and often insufficient to provide adequate heating to the cabin and to the catalytic converter controlling the vehicle harmful emissions. This is particularly true during the vehicle warm-up process in cold climates, significantly influencing real-world fuel consumption.

Conjugate heat transfer for cylinder head

Cylinder head temperatures are critical for understanding engine performance and durability. Accurate predictions of head temperatures are difficult due to the amount of physics interacting with the head. These interactions such as heat release due to combustion, valve heat transfer and friction, internal and external cooling, and oil splash cooling all contribute to head temperatures. To predict head temperature, a conjugate heat transfer (CHT) analysis integrating all of the interactions was performed.

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