Measurement of the local gas velocity at the outlet of a wall flow particle filter CUTEC-Institut GmbH, Clausthal Zellerfeld, Germany

Format:

Conference/Event

Author/Creator:

Benker, Bernd, author.

Conference Name:

7th International Conference on Engines for Automobile (2005-09-11 : Naples, Italy)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Naples, ITALY Consiglio Nazionale delle Ricerche 2005

Summary:

Recent measurements and models show that the soot distribution and the permeability of the soot layer depend on the selected engine operating points both while loading and during regeneration. The influence of an upstream oxidation catalyst on the soot distribution has been shown. Most interestingly, a radial velocity profile has been observed by an optical measuring technique.However, in actual practice only the overall pressure drop due to the thousands of parallel channels of a wall flow filter is measured. In order to find out experimentally whether or not aging and thermal instability of diesel particle filter correlate with inhomogeneous flow conditions a simple set-up was developed to measure the outlet velocity profile.A Prandtl-tube with an inner diameter of 1 mm was scanned in x- and y-direction across the outlet channels of a catalytically coated wall flow filter, which was attached to a blower. The settings of its electro motor were kept constant in all the experiments. The resolution of the micro Prandtl-tube is sufficient to resolve the flow profile of individual channels.Different loading strategies and a regeneration were examined in a time-sequence

Notes:

Vendor supplied data

Publisher Number:

2005-24-001

Access Restriction:

Restricted for use by site license