Concentration Measurements In A Cold Flow Model Annular Combustor Using Laser Induced Fluorescence
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Concentration Measurements in a Cold Flow Model Annular Combustor Using Laser Induced Fluorescence
Author | : Anonim |
Publsiher | : Unknown |
Total Pages | : 112 |
Release | : 1996 |
Genre | : Electronic Book |
ISBN | : NASA:31769000683881 |
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Monthly Catalog of United States Government Publications
Author | : Anonim |
Publsiher | : Unknown |
Total Pages | : 1076 |
Release | : 1998-07 |
Genre | : Government publications |
ISBN | : MINN:31951P00742649E |
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Flow Interaction Experiment Volume 1 Aerothermal Modeling Phase 2
Author | : Anonim |
Publsiher | : Unknown |
Total Pages | : 388 |
Release | : 1993 |
Genre | : Electronic Book |
ISBN | : NASA:31769000688989 |
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Masters Theses in the Pure and Applied Sciences
Author | : Wade H. Shafer |
Publsiher | : Springer |
Total Pages | : 448 |
Release | : 1990-09-30 |
Genre | : Science |
ISBN | : 0306437325 |
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Masters Theses in the Pure and Applied Sciences was first conceived, published, and disseminated by the Center for Information and Numerical Oata Analysis and Synthesis (CINOAS) * at Purdue. University in 1957, starting its coverage of theses with the academic year 1955. Beginning with Volume 13, the printing and dissemination phases of the activity were transferred to University Microfilms/Xerox of Ann Arbor, Michigan, with the thought that such an arrangement would be more beneficial to the academic and general scientific and technical community. After five years of this joint undertaking we had concluded that it was in the interest of all con cerned if the printing and distribution of the volumes were handled by an interna tional publishing house to assure improved service and broader dissemination. Hence, starting with Volume 18, Masters Theses in the Pure and Applied Sciences has been disseminated on a worldwide basis by Plenum Publishing Cor poration of New York, and in the same year the coverage was broadened to include Canadian universities. All back issues can also be ordered from Plenum. We have reported in Volume 33 (thesis year 1988) a total of 13,273 theses titles from 23 Canadian and 1 85 United States universities. We are sure that this broader base for these titles reported will greatly enhance the value of this important annual reference work. While Volume 33 reports theses submitted in 1988, on occasion, certain univer sities do report theses submitted in previous years but not reported at the time.
AIAA 90 2251 AIAA 90 2299
Author | : Anonim |
Publsiher | : Unknown |
Total Pages | : 378 |
Release | : 1990 |
Genre | : Airplanes |
ISBN | : PSU:000018484069 |
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Strategies for Planar Laser induced Fluorescence Thermometry in Shock Tube Flows
Author | : Ji Hyung Yoo |
Publsiher | : Stanford University |
Total Pages | : 151 |
Release | : 2011 |
Genre | : Electronic Book |
ISBN | : STANFORD:sj041st9908 |
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This thesis was motivated by the need to better understand the temperature distribution in shock tube flows, especially in the near-wall flow regions. Two main ideas in planar laser-induced fluorescence (PLIF) diagnostics are explored in this thesis. The first topic is the development of a single-shot PLIF diagnostic technique for quantitative temperature distribution measurement in shock tube flow fields. PLIF is a non-intrusive, laser-based diagnostic technique capable of instantaneously imaging key flow features, such as temperature, pressure, density, and species concentration, by measuring fluorescence signal intensity from laser-excited tracer species. This study performed a comprehensive comparison of florescence tracers and excitation wavelengths to determine the optimal combination for PLIF imaging in shock tube flow applications. Excitation of toluene at 248nm wavelength was determined to be the optimal strategy due to the resulting high temperature sensitivity and fluorescence signal level, compared to other ketone and aromatic tracers at other excitation wavelengths. Sub-atmospheric toluene fluorescence yield data was measured to augment the existing photophysical data necessary for this diagnostic technique. In addition, a new imaging test section was built to allow PLIF imaging in all regions of the shock tube test section, including immediately adjacent to the side and end walls. The signal-to-noise (SNR) and spatial resolution of the PLIF images were optimized using statistical analysis. Temperature field measurements were made with the PLIF diagnostic technique across normal incident and reflected shocks in the shock tube core flow. The resulting images show uniform spatial distribution, and good agreement with conditions calculated from the normal shock jump equations. Temperature measurement uncertainty is about 3.6% at 800K. The diagnostic was also applied to image flow over a wedge. The resulting images capture all the flow features predicted by numerical simulations. The second topic is the development of a quantitative near-wall diagnostic using tracer-based PLIF imaging. Side wall thermal boundary layers and end wall thermal layers are imaged to study the temperature distribution present under constant pressure conditions. The diagnostic technique validated in the shock tube core flow region was further optimized to improve near-wall image quality. The optimization process considered various wall materials, laser sheet orientations, camera collection angles, and optical components to find the configuration that provides the best images. The resulting images have increased resolution (15[Mu]m) and are able to resolve very thin non-uniform near-wall temperature layers (down to 60[Mu]m from the surface). The temperature field and thickness measurements of near-wall shock tube flows under various shock conditions and test gases showed good agreement with boundary layer theory. To conclude this thesis, new applications and future improvements to the developed PLIF diagnostic technique are discussed. These suggested refinements can provide an even more robust and versatile PLIF imaging technique capable of measuring a wider range of flow conditions near walls.
Fossil Energy Update
Author | : Anonim |
Publsiher | : Unknown |
Total Pages | : 808 |
Release | : 1984 |
Genre | : Fossil fuels |
ISBN | : UIUC:30112087480775 |
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Japanese Science and Technology 1983 1984
Author | : United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch |
Publsiher | : Unknown |
Total Pages | : 1080 |
Release | : 1985 |
Genre | : Science |
ISBN | : CORNELL:31924004930727 |
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