Laser spectroscopy: Multiphoton techniques expand combustion diagnostic potential
نویسندگان
چکیده
منابع مشابه
Advanced Laser Spectroscopy in Combustion Diagnostics
In recent years, a large number of linear and nonlinear laser-based diagnostic techniques for non-intrusive measurements of species concentrations, temperatures, and gas velocities in a wide pressure and temperature range with high temporal and spatial resolution were developed and have become extremely valuable tools to study many aspects of combustion. Nonlinear laser spectroscopic techniques...
متن کاملNew diagnostic methods for laser plasma- and microwave-enhanced combustion.
The study of pulsed laser- and microwave-induced plasma interactions with atmospheric and higher pressure combusting gases requires rapid diagnostic methods that are capable of determining the mechanisms by which these interactions are taking place. New rapid diagnostics are presented here extending the capabilities of Rayleigh and Thomson scattering and resonance-enhanced multi-photon ionizati...
متن کاملDiode laser induced fluorescence spectroscopy for combustion thermometry
This paper describes the first use of novel blue diode lasers to make temperature measurements based on fluorescence. As a demonstration of this principle, indium atoms were seeded as a probe species into flames and the resulting diode laser induced fluorescence allowed an accurate determination of the temperature at a point. This permits spatially resolved measurements to be made, which are im...
متن کاملDi Diesel Engine Combustion Visualized by Combined Laser Techniques
In this work we demonstrate that the progress of the combustion cycle in a four-cylinder (in-line) 1.9 1 direct injection Diesel engine can be studied effectively using different laser visualization techniques. Direct optical access to the piston bowl was facilitated by inserting quartz windows in one of the pistons. The flow field at the time of injection was characterized by seeding the flow ...
متن کاملNew Laser Techniques for Time-Resolved Spectroscopy
A novel spectroscopic tool is presented for measuring the incoherent resonance decay (IRD) of selectively (6 MHz) prepared electronic states. The method utilizes electro-optic switching of a single laser mode that is on or off resonance with respect to the homogeneous molecular packets in the excited ensemble. The technique is applied to a variety of systems: gases at low and high pressures, mo...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Nature
سال: 1983
ISSN: 0028-0836,1476-4687
DOI: 10.1038/301467a0