We present in this paper the results of an experimental study conducted on the analysis of the clogging influence of a filter installed on the suction pipe, on the axial fan operating parameters. In this study, we used an axial fan driven by a variable speed electric motor. The filter used has a removable filter element, in this context, we tested five filter elements with different filter surfaces and this to model the effect of clogging the filter on the pressure losses generated at the level of the filter in question. To obtain a differential pressure gauge installed upstream and downstream of the filter is used, the pressure value detected by the latter characterizes the relationship between the filtering surface (the surface crossed by the air flow at the filter) and the singular losses. The tests were carried out for different flow rates and speeds. The results obtained clearly show the effect of the filter clogging on the operating parameters of the fan, and characterize the relationship of these parameters with local pressure losses.
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