Combustion diagnostics

Project: Research area

Project Details

Description

A High Temperature Anemometer (HTA) which allows the measurement of gas velocities in dusty atmospheres at temperatures up to 1400°C in the range between 1 and 40 m/s was developed. The most important features of this vane-anemometer are the frictionless aerostatic bearing and the internal air cooling. The frequency of rotation is detected by a high temperature resistant optical fibre. The frequency of rotation is proportional to the gas velocity. The instrument-head is mounted on a water-cooled probe of any necessary length up to 5 m. This is long enough for the most technical applications. A combined probe for simultaneous measurement of the local gas velocity and oxygen concentration was developed in co-operation with University of Magdeburg. A zirconium oxide sensor is attached to the HTA measuring head. The simultaneous measurement of the local gas velocity and oxygen concentration gives valuable information about the mixing in a reactor. The HTA-system is rugged, easy to handle and costs only a fraction of a comparable Laser Doppler Anemometer (LDA). The comparison of results obtained from HTA and LDA measurements in the flame of a coal fired burner are nearly identically. Over 30 successful measurements at different types of furnaces (coal and biomass fired boilers, CFB, waste incinerators,...) have been carried out until now.
StatusFinished
Effective start/end date1/01/9430/06/01