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 “"PDPA"”.
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A study of droplet velocity and diameter measurements in a reacting diesel spray produced by a flow-blurring injector
… study, Phase Doppler particle analyzer (PDPA) and OH* Chemiluminescence (CL) imaging techniques are employed as a diagnostic technique to monitor the spray characteristics in the cold and reacting regions of a diesel spray flame using a flow-blurring (FB) injector. PDPA is a well-known …
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Adiabatic Developing Two-Phase Refrigerant Flow in Manifolds of Heat Exchangers
… R134a in a facility designed for visualization (PDPA, photo) and two-phase flow distribution measurements for various inlet tube and flow characteristics. For most experiments, a transparent manifold in simplified geometry was used. Further experimental analysis is done for a manifold of a real …
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Theoretical And Experimental Investigation Of The Cascading Nature Of Pressure-Swirl Atomization
… imaging, and Phase Doppler Particle Anemometry (PDPA) in order to investigate the cascade atomization process of pressure-swirl atomizers by examining swirling liquid film dynamics and the localized droplet characteristics of the resulting hollow cone spray. Specifically, experiments were …
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Pyrolysis oil combustion characteristics and exhaust emissions in a swirl-stabilized flame
… scattering and phase Doppler particle analysis(PDPA). Particulate emissions in pyrolysis oil have been found to consist predominately of unburned fuel residues (cenospheres), rather than soot, with higher emissions than LFO. Cenosphere emissions have been found to be greater for pressure …
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An Investigation of Mist/Air Film Cooling with Application to Gas Turbine Airfoils
… build. A Phase Doppler</p> <p>Particle Analyzer (PDPA) system is employed to measure droplet size, velocity and</p> <p>turbulence. Infrared camera and thermocouples are both used for temperature</p> <p>measurements.</p> <p>Mist film cooling performance is evaluated and compared against air-only …
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Dynamics of Lean Direct Injection Combustors
… oscillations in droplet diameters are discerned. PDPA measurement will be taken to identify coupling of the fuel spray with the instability, and a phase locking algorithm will be used to develop a new spray parameter than is more indicative of combustion heat release that the standard Sauter mean …
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Improving Evaporative Light Scattering Detector performance using Experiments and Modelling
… including the Phase Doppler Particle Analyzer (PDPA), the Aerodynamic Aerosol Classifier (AAC), and the Scanning Mobility Particle Sizer (SMPS), to characterise droplet and particle distributions at various stages within the device. Initial droplet size distributions were reconstructed using …
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Investigation of Particle Velocity and Drag with Spherical and Non-Spherical Particles Through a Backward Facing Step
… flakes, gravel, and cylinders. Since the PDPA is not able to measure the size of the non-spherical particles, the particles were first separated into size bins and a technique was developed using the PMT (photo multiplier tubes) gain to isolate the particle size of interest for each size …
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Investigation of atomization mechanisms and flame structure of a twin-fluid injector for different liquid fuels
… using a novel flow blurring (FB) injector. The PDPA measurements in the FB sprays at least 1.0 cm downstream of the injector exit quantitatively show the superior fuel-flexibility and atomization capability of the FB injector as compared to the AB atomizer. This study seeks to gain insight into …
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Experimental and Simulation Analysis of Water Mist Systems for Shielded Fire Applications
L'abstract è presente nell'allegato / the abstract is in the attachment