Zobrazeno 1 - 10
of 17
pro vyhledávání: '"D. W. Mattison"'
Autor:
S. De Zilwa, Jay B. Jeffries, Wontae Hwang, John E. Dec, D. W. Mattison, Ronald K. Hanson, Magnus Sjöberg, Richard R. Steeper
Publikováno v:
Proceedings of the Combustion Institute. 31:791-798
A wavelength-multiplexed, fiber-optic-based, line-of-sight, diode-laser absorption sensor is developed for crank-angle-resolved measurements of temperature and water concentration in a homogeneous-charge-compression-ignition (HCCI) engine. An initial
Autor:
Christopher I. Morris, Z. C. Owens, D. W. Mattison, Ronald K. Hanson, Ethan A. Barbour, Jay B. Jeffries, Matthew A. Oehlschlaeger
Publikováno v:
Proceedings of the Combustion Institute. 30:2799-2807
Two novel, laser-based sensors employing ultraviolet (UV) wavelengths are developed and applied to measure time-resolved temperature and OH concentration in a pulse detonation tube. These results, along with pressure data, are employed to evaluate tw
Publikováno v:
Proceedings of the Combustion Institute. 30:2791-2798
A diode-laser velocimeter based on cesium absorption spectroscopy has been used to measure the axial burned gas velocity in a pulse detonation engine (PDE) configured with and without a converging–diverging nozzle. These data are compared to simula
Autor:
Scott T. Sanders, Ronald K. Hanson, Lin Ma, Christopher Brophy, Jay B. Jeffries, D. W. Mattison, Kevin Michael Hinckley
Publikováno v:
Journal of Propulsion and Power. 19:568-572
One of the phenomena limiting the performance of pulse detonation engines (PDEs) is detonation failure due to pulse-to-pulse interference. To better understand and control such interferences, two novel laser diagnostic techniques, based on absorption
Publikováno v:
Shock Waves. 12:435-441
A diode-laser velocimeter based on atomic absorption spectroscopy has been developed and applied to a pulse detonation engine (PDE). The velocimeter uses a salt-coated sting to seed an atomic absorber at any desired location and a single, fixed-wavel
Publikováno v:
Proceedings of the Combustion Institute. 29:2661-2667
Practical combustors often produce a hostile environment for optical sensors, owing to elevated pressures, multiple phases, and unsteady behavior. Fortunately, new lasers and wavelength-tuning strategies have produced a class of wavelength-agile diod
Publikováno v:
Optics express. 10(12)
The rapid, broad wavelength scanning capabilities of advanced diode lasers allow extension of traditional diode-laser absorption techniques to high pressure, transient, and generally hostile environments. Here, we demonstrate this extension by applyi
Publikováno v:
Optics letters. 26(20)
Enhanced wavelength tuning of a distributed-feedback InGaAsP diode laser is demonstrated by use of rapid temperature cycling. The laser-active region is cycled from -10 to +50 degrees C (scanning the output from 1399 to 1403 nm) at kilohertz rates by
Autor:
Jonathan T. C. Liu, D. W. Mattison, Christopher Brophy, Jay Jeffries, Ronald K. Hanson, Jose Sinibaldi
Publikováno v:
43rd AIAA Aerospace Sciences Meeting and Exhibit.
Autor:
Wolfgang G. Bessler, David F. Davidson, Christof Schulz, Tonghun Lee, Jay Jeffries, D. W. Mattison, Ronald K. Hanson, Matthew A. Oehlschlaeger
At room temperature, CO2 is transparent in the ultraviolet (UV) at wavelengths longer than 205 nm; however, at temperatures above 1000 K the CO2 absorption cross-section becomes significant in the region between 200 and 320 nm. Because CO2 is a major
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