HEAT MASS TRANSFER FROM A CYLINDER IN THE STRONGLY OSCILLATING FLOW OF A PULSE COMBUSTOR TAILPIPE/

This paper presents the results of an experimental investigation on th e mass transport from a sintered cylinder placed inside the tailpipe o f a pulse combustor. Evaporation rates were measured at several differ ent oscillating and mean how conditions. Also measured were time resol ved velocity profiles and high speed laser schlieren video at a single operating condition. Velocity data were taken in front of and behind the cylinder as well as through the cylinder boundary layer, providing quantitative information on the temporal how behavior. Both the veloc ity data and schlieren video indicate that the momentum held is non-qu asi-steady. Over the range and combination of operating conditions stu died, the results show that mass transfer rates are strongly affected by the pressure amplitude, weakly affected by the mean flaw Reynolds n umber and unnoticeably affected by frequency.