DEVELOPMENT OF ON-LINE INSTRUMENTATION AND TECHNIQUES TO DETECT AND MEASURE PARTICULATES

Wu, Sheng ; Palm, Steve ; Tang, Yongchun ; III, William A. Goddard

California Institute of Technology (United States)

关键词: Particulates;    Exhaust Gases;    Light Sources;    Measuring Methods;    Engines;   

DOI  :  10.2172/840431
RP-ID  :  NONE
RP-ID  :  FC26-02NT41581
RP-ID  :  840431

美国|英语

来源: UNT Digital Library

【 摘 要 】

In this quarter, we have rebuilt a new multiwavelength light source which boasts over 300mW combined output from 10 different wavelengths and loss of less than 15% for each wavelength and it is much more flexible than the previous version too. Compared to the previous version, the efficiency and construction complexity have been dramatically improved for field use. We also have refined the diode pumped laser which now could give out more pulse energy than before, and this will improve the signal to noise ratio. We are also using the water jet we built in the 2nd quarter to calibrate our laser scattering outside the engine exhaust, and water jet calibration data is used to simulate the scattering results in the exhaust line.