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Skip to Search Results- 1Ahsan, Hamza
- 1Chen, Kerry
- 1Dickau, Matthew A
- 1Falahati, Farjad
- 1Ferraz Albani, Luis A
- 1Graves, Brian M
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Spring 2018
The centrifugal particle mass analyzer (CPMA)-electrometer system has been proposed as an alternative method of calibration for devices that measure black carbon. This system is proposed to replace the current calibration standard of NIOSH 5040. The repeatability and intermediate precision of the...
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Spring 2020
To reduce CO2 emissions, the aviation industry has begun looking into alternative biofuels as a replacement for conventional fossil-fuel based jet fuel. Although biofuels may reduce aircraft CO2 emissions, it is also important to consider how other emissions are effected such as particle...
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Improving Measurements of the Mixing State and Mass Concentration of Particulate Emissions from Aircraft Engines
DownloadSpring 2016
This research is focused towards improving techniques used to measure particulate emissions from aircraft engines, on two fronts: first, to characterize and quantify the mixing state of particulate emissions; and second, to calibrate black carbon mass instruments with a traceable mass...
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Development and Applications of an Emissions Micro-Simulation Tool for Transportation Infrastructure Design
DownloadFall 2014
Transportation emissions constitute a significant portion of overall emissions inventories, and contribute to air quality health concerns. Reductions in transportation emissions can be achieved through efficient design of infrastructure, effective policy and regulation, and informed planning...
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Experimental Investigation of the Effect of NaCl Additive on the Formation and Evolution of Particles in a Diffusion Flame
DownloadSpring 2017
Formation and evolution of nano-particles in a laminar co-flow methane diffusion flame were investigated under two conditions: a pure methane flame and a methane flame doped with NaCl particles. Samples of nano-particles from different heights above the burner were extracted by a probe sampling...
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Measurements of Methane Pyrolysis in a Constant Volume Batch Reactor at High Temperatures and Pressures
DownloadFall 2021
Methane pyrolysis is a process used to generate hydrogen gas and carbon black without the creation of carbon dioxide. Methane pyrolysis in a constant volume batch reactor was investigated at temperatures of 892 K, 1093 K, and 1292 K with reaction times of 15 s, 30 s, 60 s, 180 s, and 300 s with...
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Fall 2021
Flaring has been a routine practice in the petroleum and petrochemical industry and flaring levels have remained virtually constant over the past ten years despite the efforts to reduce or eliminate the activity. Injecting an inert fluid into the combustion area in order to induce complete...
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Fall 2014
The experimental work described in this thesis was conducted to study the particulate emissions from different automotive applications. The effect of fuel choice (gasoline vs. liquefied petroleum gas, LPG) on particle emissions from passenger vehicles was studied. It was shown LPG produces 5...
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Mass-Mobility Measurements of Aircraft Particulate Matter Using a Novel Measurement Method: A Centrifugal Particle Mass Analyzer and Differential Mobility Spectrometer System
DownloadFall 2013
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...
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Estimation of the Evaporation Rate of an Isolated Water Microdroplet Subjected to Infrared Radiative Heating
DownloadFall 2014
A combined numerical-experimental investigation was performed to study the influence of infrared radiation on the evaporation of a single-component droplet in the range between 10 and 50 micrometers, under different environmental conditions of relative humidity and temperature of air. A numerical...