粒子法を用いた平板に衝突する２金属液滴の凝固シミュレーション

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  • Numerical Simulation of Solidification of Two Metal Droplets Impinged on Flat Plate Using Particle-based Method

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<p>This paper describes deposition phenomenon which is one of the serious problems of gas turbines. Various numerical studies have been performed on the deposition behavior of single metal droplet, while the deposition behavior of multiple metal droplets has not sufficiently been studied by numerical simulations. In the present study, for the numerical simulation, the particle-based method was used to reproduce the spreading and solidification of the droplets impinging on the iso-thermal and non iso-thermal substrates. The calculation target was two molten tin droplets with the diameter of 2.2 mm, where the second droplet was sequentially dropped to the substrate with the center distance offsets of 3 and 4 mm. Particles were arranged on the surface of the substrate, and the temperature change was calculated by performing the grid-based computation inside the substrate. The numerical results were compared with the experimental and computed results. The results showed that the spreading shape of the second metal droplet is strongly affected by the deposit of the first droplet. Moreover, the spreading of the droplets become similar to the experiment in comparison to the isothermal case. In addition, the transient tendency of the spread factor shows reasonable agreement with the experiment by computing the temperature change in the substrate.</p>

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