PIV Measurement And Study Of Particle-laden Turbulent Round Jet

It is common knowledge that the turbulent coherent structure is a hard nut to crack in fluid mechanics.particle-laden jet is a model problem for complex and applied flows such as swirling jet.burners and reactor.lt is worth paying more efforts to the study of coherent structures of the particle-laden turbulent round jet and the interactions of solid particles with these temporal structures. A variety of advanced research techniques and methods such as experimental observation, theoretical analysis and numerical simulation are all employed to study this problem. Every means has its peculiar roles and can not be replaced by others.Based on the thoroughly review and summary in the research status quo of two phase turbulent structures and PIV development, the thesis is initiated the study of particle-laden turbulent round jet with PIV and The Streamline System. It is yielded some creative achievements with important theoretical significance and engineering application value.First.a comprehensive experimental system is established to obtain the instantaneous flow field images of the turbulent round jet. Visual images and correlative data are of captured under the typical operating conditions, which reveals the variability of the turbulent round jet.The second part of this dissertation is the study of the dispersion characteristic and concentration field of solid particles.With the experiment study in different combination operating conditions(Ratio of mass flow rate = 10 20% 30%;Re=Re= 3190 Re=6230 Re =10010;and dp=30?0 m dp=75?0 m dp=125?m),we get lots of visual images and valuable data.lt is revealed by this thesis: dispersion characteristic and concentration field of solid particles;the influence of the variety of Stokes number; the influence of the variety of ratio of mass flow rate ; the influence of the variety of Re;and the dispersion characteristic and concentration field of solid particles in different axial direction section from center to edge.With the experiment study particle-laden turbulent round jet.we get lots of visual images and valuable data.which can be the consult and according to DNS (Direct Numerical Simulation) and engineering application.