3-pentanone fluorescence yield measurements and modeling at elevated temperatures and pressures |
| |
Authors: | B H Cheung and R K Hanson |
| |
Institution: | (1) High Temperature Gasdynamics Laboratory, Department of Mechanical Engineering, Stanford University, Stanford, CA 94305, USA |
| |
Abstract: | Measurements of 3-pentanone fluorescence quantum yield (FQY) over a wide range of temperatures and pressures in air and nitrogen
bath gases are reported and a comprehensive FQY model in support of quantitative planar laser-induced fluorescence diagnostics
at elevated pressures and temperatures is presented. Measurements were made of the FQY for 20 mbar of 3-pentanone in nitrogen
and air for pressures between 1 and 25 bar in a high-pressure and high-temperature cell for excitation wavelengths of 248,
266, 277, and 308 nm. The measurements were performed in nitrogen from 298 to 745 K and in air from 298 to 567 K. The 3-pentanone
FQY data were used to optimize FQY model parameters, including the oxygen and nitrogen quenching rates and vibrational relaxation
cascade parameters for nitrogen and oxygen. This work introduces vibrational energy dependence for cascade parameters, as
well as a nitrogen quenching rate. The new 3-pentanone FQY model agrees with the measurements within 10%, as well as with
fluorescence signal measurements from optical internal combustion engines at pressures and temperatures up to 28 bar and 1100 K. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|