Accession Number:

ADA581970

Title:

Development and Application of Novel Sampling Methodologies for Study of Volatile Particulate Matter in Military Aircraft Emissions

Descriptive Note:

Final rept. Mar 2008-Sep 2012

Corporate Author:

OAK RIDGE NATIONAL LAB TN

Personal Author(s):

• Cheng, Meng-Dawn

Report Date:

2012-09-01

Pagination or Media Count:

66.0

Abstract:

Understanding the contribution of aircraft emissions to atmospheric particles starts with accurate measurement of volatile particles in the engine exhaust. We focused on the development of an advanced sampling and measurement system consisting of a dilution chamber DC and vapor-particle separator VPS. Results using monodisperse synthetic particles indicate nonvolatile nanoparticles evaporated through sublimation thus their population size remained unchanged but the number concentration decreased as the temperature increased. Volatile particles shrink and evaporate thereby reducing both the particle population size and number concentration. The results unequivocally apply to both particles from conventional diesel compression and turboshaft engine emissions. The VPS could also be used to generate thermogram that can be used to derive evaporation kinetics and energy barrier both are fundamental quantities of the thermal behavior of an aerosol population.

Descriptors:

• *AIRCRAFT EXHAUST
• *ATMOSPHERIC CHEMISTRY
• *PARTICULATES
• *VOLATILITY
• EXHAUST GASES
• MILITARY AIRCRAFT
• NITRIC OXIDE
• SAMPLERS
• SAMPLING
• SOOT
• TURBOSHAFT ENGINES

Subject Categories:

• Atmospheric Physics
• Physical Chemistry
• Test Facilities, Equipment and Methods
• Jet and Gas Turbine Engines

Distribution Statement:

APPROVED FOR PUBLIC RELEASE