Analysis of fluid flow distribution in air filtration elements for automotive applications is required in order to reduce the pressure drop and maximize the dust holding capacity. For the analysis here, a thermal imaging technique is used to visualize the fluid flow distribution of the air at the surface of the filter element. During the experiment, the feed temperature is constantly modified and the temperature at the filter element surface is monitored. The results show, that the temperature is distributed unevenly across the surface of the filter element. It is concluded, that the temperature measurement at the locale can be related to the flow rate. Therefore, the thermal imaging method is a non-contact measurement method to analyze flow rates in filter elements. The use of the thermal imaging method leads to an optimization of the fluid flow in the filtration model. The results of the thermal imaging are further compared with results of numerical simulations. In conclusion, the thermographic imaging method is a non-contact measurement to predict fluid flow distributions in filter systems. The results of this method where validated by measurements of the changes in air permeability during experimental loading under predefined conditions and can be compared with results from computational fluid dynamics (CFD) simulation. Further, CFD results can be validated with thermographic imaging.
Optimisation of airflow filters based on thermography
Optimierung von Luftfiltern auf thermographischer Basis
2005
8 Seiten, 12 Bilder, 3 Quellen
Conference paper
English
NTRS
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