Optimizing computational high-order schemes in finite volume simulations using unstructured mesh and topological data structures

Pola, Fernanda Paula Barbosa; Pola, Ives Renê Venturini

doi:10.1016/j.amc.2018.07.046

Cited by 1 publication

(1 citation statement)

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“…Figure 5 shows that a good agreement was obtained between the numerical results and the experimental results. To accurately simulate the flow characteristics near the blade, the O topology method and [33] local mesh refinement were employed around the blade as shown in Figure 4c. The tip clearance with a size of 0.5 and 1.5 mm was filled with different mesh nodes, as shown in Figure 4d.…”

Section: Validation Of the Simulation Methodsmentioning

confidence: 99%

Experimental and Numerical Investigation on the Tip Leakage Vortex Cavitation in an Axial Flow Pump with Different Tip Clearances

Shen

Zhang

et al. 2019

Processes

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The tip gap existing between the blade tip and casing can give rise to tip leakage flow and interfere with the main flow, which causes unstable flow characteristics and intricate vortex in the passage. Investigation on the tip clearance effect is of great important due to its extensive applications in the rotating component of pumps. In this study, a scaling axial flow pump used in a south-north water diversion project with different sizes of tip clearances was employed to study the tip clearance effect on tip leakage vortex (TLV) characteristics. This analysis is based on a modified turbulence model. Validations were carried out using a high-speed photography technique. The tip clearance effect on the generation and evolution of TLV was investigated through the mean velocity, pressure, and vorticity fields. Results show that there are two kinds of TLV structures in the tip region. Accompanied by tip clearance increasing, the viscous loss in the tip area of the axial flow pump increases. Furthermore, the tip clearance effect on pressure distribution in the blade passage is discussed. Beyond that, the tip clearance effect on vortex core pressure and cavitation is studied.

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Section: Validation Of the Simulation Methodsmentioning

confidence: 99%