0103 固体粒子が付加された低Reynolds数気相噴流の渦法解析(OS1-1 噴流,後流および剥離流れの流動解析と応用,オーガナイズドセッション)

概要

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An air jet, which remains laminar and axisymmetric in the single-phase flow, is simulated in the particle-laden condition. The vortex method proposed by the authors is employed. An air issues with velocity U_0 from a nozzle into the air co-flowing with velocity U_a. The Reynolds number based on U_0 is 1333, the velocity ratio U_a/U_0 is 0.4. Glass particles with diameter 65μm are loaded at the mass loading ratio 0.025. The particles impose disturbances on the air and induce the three-dimensional flow, resulting in the transition from the axisymmetric flow to the non-axisymmetric one. As the particles make the air velocity fluctuation increase, the air momentum diffuses more in the radial direction, and accordingly the spread of the jet becomes larger. The abovementioned results agree well with the trend of the existing experiments. The vortex method can capture the flow transition caused by the particles laden on an axisymmetric air jet.
社団法人日本機械学会の論文
2009-11-06