Heat Transfer

Parametric 3D model to evaluate different motors

Electric motors generate heat during their operation as a result of both electrical and mechanical losses. This emitted heat is essential to be removed in order to ensure the proper operation of the motor. The dissipation of the heat is achieved in most cases through conductive cooling (housing of the motor). To increase the outer heat exchange surface between the housing and the cooling medium usually fins are placed on the housing. Apart from their power electric motors may differ in the housing geometry (i.e. dimension, number and size of the fins etc).

Impact of wall heat transfer on engine behavior

The effect of thermal wall functions is discussed in terms of engine thermal balance, thermal state characterization and impact on engine performance. In particular, the newly implemented GruMo-UniMORE wall function is applied to improve the prediction of knock limit in SI engines and combustion behavior in CI engines.

Pulley blade shape optimization using Optimate+

Target is to design optimized blade shape on a pulley in order to cool down a rubber that drag a belt.

The blade shape designs are optimized using Optimate+ and  STAR-CCM+® 3D CAD model.

Parameters are defined and 100 simulations are launched in order to find the best design.

Steady simulations are performed with rotation, and the best design giving high heat transfer coefficient and high velocity is found.