Abstract: The Three-Dimension Laser Particle Dynamic Analyzer (PDA) wasused in the present experimental study. The instantaneous gas andparticle velocities were measured for the particle-laden turbulent reactingflow in a combustor with staged air injection. Theinstantaneous gas velocity was also measured. The distributions of time-averaged axial and tangential velocities,root mean squares of axial and tangential fluctuating velocities, andsecond-order correlation moments of axial and tangential fluctuatingvelocities were obtained both for the gas and particle phases and for thesingle gas phase.