Accession Number : ADP008994

Title :   Laser Velocimetry in Semi-Industrial Natural Gas, Oil and Coal Flames by Means of a Water-Cooled LDV Probe,

Corporate Author : TECHNICAL UNIV OF LISBON (PORTUGAL)

Personal Author(s) : Dugue, Jacques ; Weber, Roman

Report Date : 23 JUL 1992

Pagination or Media Count : 6

Abstract : A water-cooled jacket enclosing a small fiber-optics LDA probe has been designed to perform laser velocimetry measurements in semi-industrial scale flames. The paper presents details of the probe design for front optics cooling and prevention of window contamination. Experiments in natural gas, heavy fuel oil and coal flames have demonstrated fast and reliable operation. Laser velocimetry measurements are performed with the same speed as standard suction pyrometry. Operation for long periods in high temperature flames with high particle loading showed no heating of the LDV optics and no fouling of the front window. The effects of the probe intrusiveness and probe purge flow on the measurements accuracy were assessed and shown to be minor, provided that the measurement volume is located at least one and a half probe diameter from the probe tip. (Author)

Descriptors :   *FLAMES, *LASER VELOCIMETERS, *FIBER OPTICS, PROBES, WATER COOLING, HIGH RESOLUTION, ACCURACY, QUICK REACTION, EXPERIMENTAL DESIGN, NETHERLANDS.

Subject Categories : Combustion and Ignition
      Optical Detection and Detectors
      Fiber Optics and Integrated Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE