Euler analysis of transonic propeller flows

Barton, J. M.; Yamamoto, Osamu; Bober, L. J.

doi:10.2514/3.22985

Cited by 6 publications

(1 citation statement)

References 15 publications

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“…highly three-dimensional nature of the blade designs do not lend themselves easily to standard two-dimensional design philosophies, and therefore require advanced CFD analysis techniques to verify the performance of candidate designs. Numerical analyses for steady propfan flows in three spatial dimensions have been given by Barton et al (1987), Usab et al (1988) Saito et al (1988), Matsuo et al (1988), Kobayawa and Hatano (1988), Celestina et al (1986), Whitfield et al (1987) and others.…”

Section: Introductionmentioning

confidence: 99%

Time-Dependent Aerodynamic Analysis of Ducted and Unducted Propfans at Angle of Attack

Hall¹,

Delaney²

1991

Volume 5: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation;

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A three-dimensional unsteady aerodynamic analysis is described for predicting the time-dependent flow about ducted and unducted propfans operating at angle of attack. Although the freestream is assumed to be uniform, the flow relative to the rotating blades varies with circumferential position, resulting in an inherent unsteadiness due to the nonaxial inflow. The time-dependent Euler equations are solved utilizing a Runge-Kutta time-stepping scheme. The analysis is based on a finite-volume discretization employing a multiple-block grid network. To permit the use of large calculation time steps, an implicit residual smoothing scheme previously tested for unsteady flow calculations in two dimensions is extended to three spatial dimensions. For unducted propfans, a single H-type grid block is used for each blade passage to determine the time-periodic flowfield. For ducted propfans (ultra-high bypass fans) a body-centered C-type grid is wrapped about the cowl to improve the accuracy of the analysis in the high gradient flow region near the cowl leading edge. Numerical results are compared with available data for both ducted and unducted propfans operating at angle of attack.

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