The laser-induced-fluorescence method has been employed for remote, non-instructive and instantaneous measurements of a fuel droplet burning under microgravity. A fuel droplet was doped with naphthalence and TMPD. The fluorescence emission spectra from a droplet subjected to the incident nitrogen laser beam were measured with an image-intensifying optical multichannel analyser. The microgravity was generated in a capsule of a 100 m drop shaft. The results showed that the newly developed diagnostic system could be applied succesfully for the simultaneous measurements of droplet temperature and diameters of the droplet, flame and soot shell under microgravity. The droplet temperature was determined from the measured ratio of fluorescence emission intensities at two different wavelengths. The soot shell was located in the vicinity of the droplet surface deep inside the flame during the early of the burning and moved away from the droplet with the elapse of time.
Laser-induced fluorescence for the non-intrusive diagnostics of a fuel droplet burning under microgravity in a drop shaft
Measurement Science and Technology ; 10 , 10 ; 853-858
1999
6 Seiten, 13 Bilder, 16 Quellen
Article (Journal)
English
Laser Diagnostics for Microgravity Droplet Studies
British Library Conference Proceedings | 1994
|Laser Diagnostics for Microgravity Droplet Studies
British Library Conference Proceedings | 1994
|Laser diagnostics for microgravity droplet studies
AIAA | 1994
|