Oxygen Fluorescence as a Means for Temperature and Pressure Measurement

摘要

The application of interest in this work is the measurement of air temperature and pressure using broadband laser-induced fluorescence (LIF). Because of the cost, bulkiness, and operating complications of ArF lasers, a xenon flashlamp is used instead of LIF. The oxygen is excited by photons in the 185-200nm range. Large wavelength windows (100nm and 65nm) are used to reduce the fluctuations in the total measured fluorescence. A correlation between temperature and fluorescence ratio is developed with an error in fluorescence ratio of approximately +-1.3%, resulting in an error in temperature of +-1.35°C for temperatures from 25- 50°C.