![]() The primal solution was driven to convergence by successively increasing the coupled solver Courant number. A moving reference frame approach was used to simulate the effects of the moving geometry. ![]() The solution was solved steady-state, using a coupled solver approach and k-epsilon turbulence. First, a well-converged primal solution was obtained on a polyhedral mesh. The optimization process was accomplished using the Adjoint solver and mesh morpher in STAR-CCM+. Adjoint optimization is an efficient sensitivity analysis method for aerodynamic shape and pressure drop evaluation. To optimize the fan-shroud shape to maximize cooling air mass flow rates through the heat exchangers, researchers from Argonne National Laboratory, Cummins and CD-Adapco used the Adjoint approach to optimization. In heavy-duty trucks, the cooling package includes the heat exchanger, fan shroud and fan. The vehicle underhood compartment consists of the engine and cooling package. Shroud design affects both the airflow and the noise generated by the fan. Fan shrouds funnel cooling air, which is sucked by the fan and passed through heat exchangers. Fan and fan-shroud design is crucial for underhood airflow management. Tighter emissions requirements and underhood packing due to higher power demands from engines necessitate more optimized cooling packages. The main difference between the original (i) and optimized (ii) fan shroud is variation in the shape of the surface edges.
0 Comments
Leave a Reply. |
Details
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |