A procedure was employed to calibrate a flow resistivity test set-up, using a rigid plate featuring cylindrical holes of a well-defined radius, as suggested in the ISO9053 standard. At low flow rates, the flow motion though such cylindrical holes could be described by a Poiseuille model as mentioned in the standard. However, end-effects should be taken into account, which are not mentioned in the standard. Formulas are given to account for these end-effects. Furthermore, at higher flow rates the Poiseuille model does not represent the physics of the problem any more due to jet-forming, requiring a numerical CFD model to describe the flow through the holes of the calibration plate. This work considers both models, comparing the numerical outcome with measurements carried out on the calibration plate, and gives design rules for the aforementioned calibration plate.
On the use of a perforated plate for the calibration of a flow resistivity measurement apparatus
Piana E. A.;
2021-01-01
Abstract
A procedure was employed to calibrate a flow resistivity test set-up, using a rigid plate featuring cylindrical holes of a well-defined radius, as suggested in the ISO9053 standard. At low flow rates, the flow motion though such cylindrical holes could be described by a Poiseuille model as mentioned in the standard. However, end-effects should be taken into account, which are not mentioned in the standard. Formulas are given to account for these end-effects. Furthermore, at higher flow rates the Poiseuille model does not represent the physics of the problem any more due to jet-forming, requiring a numerical CFD model to describe the flow through the holes of the calibration plate. This work considers both models, comparing the numerical outcome with measurements carried out on the calibration plate, and gives design rules for the aforementioned calibration plate.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
