Analysis of particulate matter concentration and size distribution in heavy-duty vehicle exhaust emissions

This study put forward a method to predict the concentration field in the plume of a heavy-duty truck, operating at highway speed. It provided information regarding computation of dispersion coefficients in the area near a stack.;The numerical cumulative frequency fit method obtained in this study provided an effective and quick means for determining the particle size distribution parameters (the mass median aerodynamic diameters and geometric standard deviations) of sample data for the multi-modal distribution.;The particle size distribution of the compressed natural gas buses tested was characterized by a bi-modal particle size distribution; the clean diesel buses had a uni-modal particle size distribution.;The heavy-duty diesel trucks exhibited the Count Median Diameter (CMD) values ranging from 30 nm to 60 nm. EC-Diesel truck test yielded a CMD of 33 run (baseline), a CMD of 37--39 nm (with a JM-CRT), and a CMD of 40--47 nm (with a Engelhard DPX). CARB's baseline was at 56 nm.;The thesis has 7 Chapters, 14 Tables, and 36 Figures.

Name thesis:degree_name

MS

Level thesis:degree_level

Thesis

Discipline thesis:degree_discipline

Mechanical and Aerospace Engineering

Year dc:date.available

2001

Author dc:creator

• Xu, Zhuyun

Contributors dc:contributor

• Mridul Gautam.

• Mechanical engineering
• Environmental engineering
• Automotive engineering

Identifier

https://researchrepository.wvu.edu/etd/1168

OAI identifier oai:identifier

oai:researchrepository.wvu.edu:etd-2171