Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 10 of 10 for “"particle sampling"”.
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Optical Field Instrumentation for Characterizing Particle Sampling Sensors
Particle ingestion in gas turbine applications can be detrimental to performance and pose significant safety concerns. Areas of high sand concentration are hazardous to aircraft, requiring precautions like routine inspections and maintenance. The engine failure modes are dependent on particle …
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Evaluation of a Particle Sampling Probe to Measure Mass Concentration in Particle-Laden Flows
Particle ingestion is a prevalent issue for jet engines. During operation, sand and ash particles enter the engine and can cause serious problems, including erosion and buildup of Calcia-Magnesia-Alumina-Silicate (CMAS) deposits. Analyzing the particle mass concentration of the airflow can help …
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Modeling of particulate matter creation and evolution in aircraft engines, plumes and particle sampling systems
… arguments are used to suggest that gas to particle conversion at ground level temperatures is a process too slow for volatile particles to exist before the plume reaches the sampling system and thus little if no modification of the PM characteristics should be measured. However, the …
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Development of Diagnostic Tools for Use in a Gas Turbine Engine Undergoing Solid Particulate Ingestion
… operations as significant amounts of groundlevel particles can be entrained in the surrounding air and subsequently ingested into the engine. Prolonged exposure to particle ingestion events leads to premature engine wear and, in extreme cases, rapid engine failure. Expanding our current …
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Development of a Novel Probe for Engine Ingestion Sampling in Parallel With Initial Developments of a High-speed Particle-laden Jet
Particle ingestion remains an important concern for turbine engines, specifically those in aircraft. Sand and related particles tend to become suspended in air, posing an omnipresent health threat to engine components. This issue is most prevalent during operation in sandy environments at low …
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Microphysical Mechanisms in Stratiform Precipitation as Observed in OLYMPEX
… simultaneous in-situ aircraft microphysical sampling and ground-based dual-polarization radar measurements. On 12 November, the University of North Dakota Citation research aircraft flew through a widespread region of stratiform precipitation in the pre-warm frontal sector of the storm. In …
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Development of a semivolatile aerosol dichotomous sampler
… some of the problems of existing personal sampling methods such as evaporative loss during filter sampling. The main difference between virtual impactors and the SADS was the inverted flow ratio between the major and the minor flow. Sampling in the SADS settings gave a lower cutsize in both …
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In-Cylinder Soot Oxidation in an Optically Accessible Automotive Diesel Engine
… soot formation, whereas the oxidation of soot particles remains an unexplored and least studied topic. To bridge this gap, this thesis aims to improve the fundamental knowledge about the in-cylinder soot oxidation and its significant role in lowering late-cycle soot levels. Of particular …
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Topics in the Theory of Quantum Degenerate Gases
… particular implementation that we chose (free particle sampling) is not sufficient to produce reliable results at low temperatures. In the second part we consider the Josephson Effect between two spatially separated Bose-Einstein condensates of atoms each of which can be in two hyperfine …
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Topics in the theory of quantum degenerate gases
… particular implementation that we chose (free particle sampling) is not sufficient to produce reliable results at low temperatures. In the second part we consider the Josephson Effect between two spatially separated Bose-Einstein condensates of atoms each of which can be in two hyperfine …