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- W2326960032 abstract "The flow field in a rotating low Mach number axial fan is studied by large-eddy simulations (LES). The Reynolds number based on the outer casing diameter and the rotational speed of the fan tip is 9.36 × 10. A parallelized finite-volume flow solver for unsteady compressible Navier-Stokes flows based on hierarchical Cartesian grids and a conservative cut-cell method to describe the complex fan geometry is used. For a simulation of a 72 fan section, which resolves one out of five blades, and for a flow rate coefficient of Φ = 0.165 and tip-gap size of s/Do = 0.01 an interaction of the turbulent wake caused by the decay of the tip-gap vortex with the neighboring blade is observed. For this critical case, the impact of the periodic boundary condition in the circumferential direction on the axial fan flow field is investigated. Therefore, besides the single-blade solution, a 360 full-fan computation is conducted using the same grid resolution. Numerical results of the flow field from both computations are compared and analyzed in detail. It is shown that the impact of prescribed periodicity for the investigated configuration and operating point is marginal such that the use of periodic boundary conditions is reasonable not only in the context of efficient flow analyses." @default.
- W2326960032 created "2016-06-24" @default.
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- W2326960032 date "2016-01-02" @default.
- W2326960032 modified "2023-09-27" @default.
- W2326960032 title "Impact of Periodic Boundary Conditions on the Flow Field in an Axial Fan" @default.
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- W2326960032 doi "https://doi.org/10.2514/6.2016-0610" @default.
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