Please log in

Paper / Information search system




Please log in

  • Summary & Details

Effect of Exhaust Gas Velocity and Particle Size on Initial Filtration Efficiency and Pressure Drop of Gasoline Particulate Filter


Detailed Information



Author(J)1) 山本 和弘, 2) 青井 智弥
Author(E)1) Kazuhiro Yamamoto, 2) Tomoya Aoi
Affiliation(J)1) 名古屋大学, 2) 名古屋大学


Abstract(E)In comparison with port fuel injection (PFI) engines, gasoline direct injection (GDI) engines have higher fuel efficiency. However, there are more particulate matters (PMs) including soot in the exhaust gas. Then, we need gasoline particulate filters (GPFs) with high filtration efficiency for the future stringent PM emission regulations. In this study, we simulated the filtration process on the pore-scale of the filter wall by a lattice Boltzmann method (LBM). The structure of filter wall was obtained by an X-ray CT technique. We discussed pressure drop and initial filtration efficiency, which are important characteristics of GPFs, by changing the inlet velocity of exhaust gas and soot particle size. Results show that, as the soot particle size is smaller, the thicker soot cake layer is formed on the surface of the filter wall, resulting in the smaller pressure drop. The initial filtration efficiency is higher as the particle size is smaller due to the Brownian diffusion. Moreover, when the particle size is larger, the interceptional effect is dominant, and the initial filtration efficiency is higher. As the inlet velocity is smaller, the thicker soot cake is formed on the surface of the filter wall due to the higher filtration efficiency. The pressure drop decreases as the inlet velocity is smaller.

About search


How to use the search box

You can enter up to 5 search conditions. The number of search boxes can be increased or decreased with the "+" and "-" buttons on the right.
If you enter multiple words separated by spaces in one search box, the data that "contains all" of the entered words will be searched (AND search).
Example) X (space) Y → "X and Y (including)"

How to use "AND" and "OR" pull-down

If "AND" is specified, the "contains both" data of the phrase entered in the previous and next search boxes will be searched. If you specify "OR", the data that "contains" any of the words entered in the search boxes before and after is searched.
Example) X AND Y → "X and Y (including)"  X OR Z → "X or Z (including)"
If AND and OR searches are mixed, OR search has priority.
Example) X AND Y OR Z → X AND (Y OR Z)
If AND search and multiple OR search are mixed, OR search has priority.
Example) W AND X OR Y OR Z → W AND (X OR Y OR Z)

How to use the search filters

Use the "search filters" when you want to narrow down the search results, such as when there are too many search results. If you check each item, the search results will be narrowed down to only the data that includes that item.
The number in "()" after each item is the number of data that includes that item.

Search tips

When searching by author name, enter the first and last name separated by a space, such as "Taro Jidosha".