Measurements of Combustion Gases Using Tunable Diode Laser Absorption Spectroscopy PDF Download
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Author: Reynolds Reed Skaggs
Publisher:
ISBN:
Category :
Languages : en
Pages : 554
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Book Description
Author: Reynolds Reed Skaggs
Publisher:
ISBN:
Category :
Languages : en
Pages : 554
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Book Description
Author: R. K. Hanson
Publisher:
ISBN:
Category :
Languages : en
Pages : 9
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Book Description
Applications of tunable infrared diode lasers for combustion gas measurements are described. The diode laser serves as a source of narrow-linewidth infrared radiation whose wavelength can be rapidly modulated to perform fast, high-resolution absorption spectroscopy. Measurements of fully resolved vibration-rotation lines in the fundamental band of CO are used to infer temperature, CO species concentrations and CO collisions halfwidths in the post-flame gases of a flat flame burner. The feasibility of diode laser measurements in fluctuating and particle-laden combustion flows is also demonstrated. (Author).
Author: Susan M. Schoenung
Publisher:
ISBN:
Category : Absorption spectra
Languages : en
Pages : 21
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Book Description
The initial work in a program at Stanford to develop laser-based combustion diagnostics has focused on tunable laser absorption spectroscopy using an infrared diode laser. An important aspect of this program is the validation of the laser technique under controlled conditions and by comparison with established probe-based methods. This paper reports preliminary results from such experiments, which consisted of CO concentration measurements in a flat premixed flame using a tunable diode laser, and both CO and CO2 measurements in a similar flame using an uncooled, aerodynamically quenched quartz sampling probe. CO was chosen for this study for several reasons: it is an important flame species whose concentration can be predicted under equilibrium conditions which prevail in the post-flame region of fuel-rich flames; its concentration in combustion products can be easily varied from 10 ppm to greater than 10%, a range which is compatible with commercial NDIR instruments; and it has a well-understood infrared absorption spectrum which simplifies analysis of the absorption measurements.
Author: Susan Marie Schoenung
Publisher:
ISBN:
Category : Carbon monoxide
Languages : en
Pages : 234
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Book Description
Author: Patricia Kuntz Falcone
Publisher:
ISBN:
Category : Absorption spectra
Languages : en
Pages : 209
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Book Description
Author: Cristian Ravariu
Publisher: BoD – Books on Demand
ISBN: 1789233046
Category : Technology & Engineering
Languages : en
Pages : 254
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Book Description
The Green Electronics book is intended to stimulate people's thinking toward the new concepts of an environment-friendly electronics - the main challenge in the future. The book offers multiple solutions to push the classical electronic industry toward green concepts, aided by nanotechnologies, with revolutionary features that provide low power consumption in electronics, use biomaterials for integrated structures, and include environmental monitoring tools. Based on organic semiconductors/insulators without toxic precursors, green electronic technologies launched promising devices like OLED, OTFT, or nano-core-shell transistors. The Green Electronics book successfully presents the recent directions collected worldwide and leaves free space for continuing year by year with new subtopics.
Author: M. P. Arroyo
Publisher:
ISBN:
Category :
Languages : en
Pages : 6
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Book Description
A tunable diode laser diagnostic based spectrally resolved laser absorption has been developed to detect water vapor. The system uses a distributed feedback InGaAsP diode laser, emitting around 1.385 micrometer. The diode laser is tuned in wavelength by modulating its driving current at frequencies up to 5 KHz Temperatures, concentrations and pressures are inferred from the directly measured absorption spectra. Velocity is derived from the Doppler shift of these absorption spectra. The technique has been demonstrated for multiple-parameter measurements of the water vapor present in laboratory room air, in the postflame gases above a methane-air flat fame burner and in the high speed unidimensional transient flows generated in a shock tube. The results agree well with the calculated valves and independent measurements. (Author).
Author: Christoph Dyroff
Publisher:
ISBN: 9783866443280
Category : Technology (General)
Languages : en
Pages : 0
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Book Description
This book discusses the mechanical and opto-electronic design of laser spectrometers for measuring two very important atmospheric gases, namely water vapor and its isotopic ratios, and formaldehyde. For measuring water vapor, shot-noise limited sensitivity has been achieved by a careful choice of system components and data processing. For measuring formaldehyde, a selective sample modulation exploiting the Stark effect has been used to greatly improve the sensitivity.
Author: J. H. Miller
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Author: Xiaojuan Cui
Publisher:
ISBN:
Category : Technology
Languages : en
Pages :
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Book Description
Due to the fact of global warming, air quality deterioration and health concern over the past few decades, great demands and tremendous efforts for new technology to detect hazard gases such as CH4, CO2, CO, H2S, and HONO have been performed. Tunable diode laser absorption spectroscopy (TDLAS) is a kind of technology with advantages of high sensitivity, high selectivity, and fast responsivity. It has been widely used in the applications of greenhouse gas measurements, industrial process control, combustion gas measurements, medicine, and so on. In this chapter, we will briefly summarize the most recent progress on TDLAS technology and present several kinds of gas sensors developed mainly by our group for various field applications. These could expand from energy, environment, and public safety to medical science.
