b'Figure 7. Here the airflow generated byFAN Power [W]the fan is crucial and far outweighs the400 350300250 200 150effect of radiator length.540As mentioned it is critical that all driving520conditions are met, Table 2 is a summary500of the designs that fail (red), meet480Radiator within 5C (yellow), and exceed (green)Length [mm] 460the requirements. 440It is also useful to plot these values as420seen in Figure 8. 400Conclusions OK OK within tolerance KOThe results obtained confirm someTable 2: Summary of resultsthings we already know: if radiator length is decreased, fan power needs to be increased and vice-versa. Also, results confirm radiator length has more influence at higher speeds, whereas fan power has more influence at lower speeds. The true value of this type of analysis is understanding the sensitivity of each parameter in the final results, and the boundary of viable radiator and fan combination setups.Ultimately, these results allow engineers to understand the trade-offs between variables and make better design choices amongst the viable cases. Selecting a configuration based on costs, fuel efficiency, reliability, aerodynamics and vehicle performance, etc. nFigure 8: Cooling requirements according to all driving conditionsRunning a Design of Experiments analysis is not always about searching for a single optimal configuration, but sometimes understanding the trade-offs between variables, finding the boundary of viable configurations and making smart decisions. With Simcenter Flomaster all of this can be done very early, even before all geometric information of the system is availableFabricio Thomaz Engineer FCA Fiat Chrysler Automobiles27'