Velocity and Temperature Measurements in a Can-Type Gas-Turbine Combustor,
IMPERIAL COLL OF SCIENCE AND TECHNOLOGY LONDON (ENGLAND) DEPT OF MECHANICAL ENGINEERING
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Velocity and temperature measurements were obtained in a can-type combustor operating at near atmospheric pressure. Velocity characteristics are determined with a laser Doppler velocimeter and a digitally compensated fine bare-wire thermocouple was used to measure the mean and rms values of temperature fluctuations. This paper emphasises the experimental methods, identifies the main sources of imprecision, evaluates the estimate of the related errors and presents sample results so as to demonstrate the effect of air-fuel ratio on the velocity and temperature characteristics of the combustor. The imprecision in velocity measurements was mainly associated with statistical errors and velocity gradient broadening effects due to the finite size of the measurement volume. The error in the mean temperature was mainly due to radiation losses which monotonically increased with temperature and were less than 8. The effect of AFR on the velocity and temperature characteristics was relatively weak in the primary zone of the combustor.
- Fluid Mechanics
- Test Facilities, Equipment and Methods
- Combustion and Ignition