The objective of this work is to study a spray generated by an airblast atomizer at elevated ambient pressures. The study includes the measurement of a typical spray's integral parameters (average drop diameter and average three-dimensional velocity vector of liquid and gas phases), numerical simulation of spray propagation, and models validation. The numerical study of the spray evolution was carried out using an accurate numerical spray module based on an Euler-Lagrange method accounting for drops evaporation. The experimental data were collected using the phase Doppler and particle image velocimetry techniques. The drop diameter and two velocity components were measured simultaneously using two-dimensional phase Doppler system. These data were used as initial conditions for the numerical simulations (data in the neighborhood of the atomizer exit) and for the validation of the numerical method (data on the spray parameters measured at various distances from the atomizer). The droplet diameter and spray velocity are shown to be influenced by the enhancing of the ambient chamber pressure.