Modelling Flow and Pressure Losses in Gasoline Particulate Filters
Gasoline emissions control catalysis has been around for more than 30 years. However, imminent introduction of Euro 6 emissions standards means increased interest in GPF (Gasoline Particular Filter) technology. Although the wall-flow filter geometry is similar to Diesel Particulate Filter (DPF) and Selective Catalyst Reduction Filter (SCRF) geometries, there are differences in structure (GPF does not have cement segments), operating regime (mass flow rates and temperatures + continuous regeneration) and wall surface parameters.
Several models exist (e.g. widely used model by Konstandopoulos 1989). These usually assume one- or two-dimensional flow and take into account basic friction losses and Darcy losses through the porous walls. However, the existing models fail to predict the flow adequately even for moderate mass flow rates characteristic for gasoline engines. Therefore, separate studies of GPF pressure losses and flow uniformity are needed to improve predictions offered by existing DPF/SCRF research, and to provide adequate models for CAE analysis.
The purpose of this project is to investigate (experimentally and numerically) flows in gasoline particulate filters and to develop a semi-analytical model describing the flow and pressure loss in such systems in terms of the filter properties and flow configuration. It will involve modelling the flow in StarCCM+ as well as experimental measurements of the pressure losses and velocities upstream and downstream of the filter.
Duration: Full Time 3 years Fixed Term or Part Time 5 years Fixed Term (April start date)
About the Centre/Department
Our research in Mobility & Transport works across our faculties and focuses on the design and engineering of future transport systems, including the growing influence of the internet and connectivity. The focus is on inclusive, sustainable and safe transport integrating the strongest research elements in design and engineering.
The successful applicant will work with the group of researchers with more than 20 years of experience in engine and emissions research. We are one of a small number of leading European research groups active in this field providing both technical expertise and dedicated test facilities. The research is supported by two well-equipped laboratories: a computerised engine test cell and an advanced flow laboratory.
Our research involves computational and experimental studies and centres around the development and validation of computer software for the prediction of the performance of emission after-treatment systems associated with Diesel and spark-ignition (SI) engines. An important strand is understanding the multi-physics associated with these systems, namely the fluid flow, heat and mass transfer and heterogeneous kinetic processes.
Successful applicants will have:
- A minimum of a 2:1 first degree in a relevant discipline/subject area with a minimum 60% mark in the Project element or equivalent with a minimum 60% overall module average,or
- A Masters Degree in a relevant subject area will be considered as an equivalent. The Masters must have been attained with overall marks at merit level (60%). In addition, the dissertation or equivalent element in the Masters must also have been attained with a mark at merit level (60%).
- The potential to engage in innovative research and to complete the PhD within a prescribed period of study
- Language proficiency (IELTS overall minimum score of 7.0 with a minimum of 6.5 in each component).
- The candidate is expected to have a solid Fluid Mechanics background and good understanding of mechanisms and properties of turbulent flows. Modelling experience is beneficial
Find out how to apply: http://www.coventry.ac.uk/research/research-students/how-to-apply/?id=88848
See the website: http://www.coventry.ac.uk/research/research-students/research-studentships/modelling-flow-and-pressure-losses-in-gasoline-particulate-filters/