High Speed H2O Concentration Measurements Using Absorption Spectroscopy to Monitor Exhaust Gas

摘要: This paper demonstrates the potential for fast absorption spectroscopy measurements in diesel-engine exhaust to track H2O concentration transients. Wavelength-agile is an optical technique that measures broadband spectra between 10kHz and 100 MHz. From these measured spectra, gas temperature absorber can be determined. The Fourier-domain mode-locking (FDML) laser becoming recognized as one of most robust reliable wavelength-agile sources available. during combustion events at crank angle resolved speeds are beneficial a wide variety applications, such product improvements industry, control reliability checks experimental researchers, fit numerical simulations. difficulties associated with measuring diesel compared in-cylinder discussed. A full description configuration data processing explained. Measurements engine transients 10- s temporal resolution presented range conditions.