In order to study the atomization characteristics of fuel in the high temperature cross airflow with high temperature,a Particle Image Velocimetry(PIV) and the digital image processing techniques are employed to capture digital pictures of the fuel spray fields for the simple nozzle in such a flow.Experimental results of the spray field show that:(1) With the injection pressure increasing,the particle PDF distribution changes little;(2) In high temperature flow,the increase of injection pressure leads to th...