UC Irvine

The use of a compensated thermocouple probe to measure time-resolved temperature simultaneously with time-resolved axial and azimuthal velocity is assessed in a compl ex flow Di lute Swirl Combust or (DSC). ~esults indic~te that the measured val ues of tlie mean and root- mean-square temperature and velocity-temperature correlations are sensitive to the amount of compensati on. Variation in the compensation coefficient of 25% leads to a variation of 20% in the indicated root-mean- square temperature and 50% in the axilll heat flux. The effect of probe perturbation on the velocity field is also assessed and found tn he ( 1 ) s ignificant nellr the ll>C i s of the combustc)r. cind to become l ess significant off axis, and (2) not confined t o the immediate !lrell downstream. of the probe but to extend up to one combustor diameter. 1ipstream. Finally, the Reynolr1s stress and lizimuthal !ind axia 1 heat fluxes as well as other statistical rruanti ties of fluid mechanic interest obtainP.d from simult aneous time-resolved measurement s of the temperature ana velocity are presentea.