Mass-Mobility Measurements of Aircraft Particulate Matter Using a Novel Measurement Method: A Centrifugal Particle Mass Analyzer and Differential Mobility Spectrometer System

  • Author / Creator
    Johnson, Tyler J
  • Mass-mobility measurements using a centrifugal particle mass analyzer (CPMA) and differential mobility spectrometer (DMS) are demonstrated. The CPMA, which classifies an aerosol by mass-to-charge ratio, is used upstream of a DMS, which measures the mobility size distribution of the mass-classified particles in real-time. Since the CPMA classifies particles by mass-to-charge ratio and multiply-charged particles are present, the particle mobility sizes of several different masses will be measured by the DMS. Therefore, a correction scheme is required to make accurate measurements. To validate this measurement scheme, two different CPMA-DMS systems were used to measure the known density of di(2ethylhexyl) sebacate (DEHS). The first system used a standard DMS500 (sDMS, Cambustion), while the second system used a modified DMS (mDMS), which had lower sizing uncertainties. The second configuration, a CPMA-mDMS system, was then used to measure the mass and mobility of aircraft particulate matter generated by CFM56-5B4-2P, CFM56-7B26 and PW4000-100 turbine engines.

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  • Type of Item
  • Degree
    Master of Science
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    This thesis is made available by the University of Alberta Libraries with permission of the copyright owner solely for non-commercial purposes. This thesis, or any portion thereof, may not otherwise be copied or reproduced without the written consent of the copyright owner, except to the extent permitted by Canadian copyright law.