Gas and particle instantaneous velocity measurement in swirling particle-laden turbulent reacting flow

Experimental study of particle-laden turbulent reacting flow was conducted on a test facility for swirl combustor. The Three-Dimension Particle Dynamic Analyzer (PDA) was employed to measure the gas and particle instantaneous velocities. The measured results provide the distributions of time-averaged axial and tangential velocities, root mean square of axial and tangential fluctuating velocities, and correlation moments of axial-tangential fluctuating velocities for both gas and particle phases and the distribution of particle mean diameter. The Probability Density Functions (PDF) for the instantaneous particle axial and tangential velocities are also obtained at each measuring location. The gas and particle axial and tangential velocities as well as axial and tangential fluctuating velocities are large in the upstream central region of the combustor. Differences are found evidently between the gas and particle fluctuating velocity components.