A number of processes in the chemical industry and in combustion science involve the evaporation of atomised liquids in a turbulent environment. To allow an optimisation of such processes and to provide data for the validation of numerical calculations, the spray evaporation in a heated turbulent air stream was studied experimentally. The ¯ow con®guration was a pipe expansion with an expansion ratio of 3, where heated air entered through an annulus with the hollow cone spray nozzle being mounted in the centre. In the experiments isopropyl alcohol was used as a liquid because of its high evaporation rate. Measurements were taken for dierent ¯ow conditions, such as air ¯ow rate, air temperature, and liquid ¯ow rate in order to provide a set of reliable data. Phase-Doppler anemometry (PDA) was applied to obtain the spatial change of the droplet size spectrum in the ¯ow ®eld and to measure droplet size±velocity correlations. From these local measurements pro®les of droplet mean velocities, velocity ¯uctuations and droplet mean diameters were obtained by averaging over all droplet size classes. Moreover, recent extensions of the PDA signal processing allowed for accurate determination of the droplet mass ¯ux, from which also the global evaporation rates could also be determined. The data for the dierent ¯ow conditions also include the inlet conditions for air ¯ow and spray (i.e., for all three velocity components), inlet temperature, and wall temperature pro®les. The latter were measured using a thermocouple with a special wall sensor.