Increasing Boundary Layer Stability for Varying Degrees of Diffuser Loading

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dc.identifier.uri Mimic, Dajan ger Jätz, Christoph ger Sauer, Philipp ger Herbst, Florian ger 2018-12-20T10:59:50Z 2018-12-20T10:59:50Z 2018
dc.identifier.citation Mimic, D.; Jätz, C.; Sauer, P.; Herbst, F.: Increasing Boundary Layer Stability for Varying Degrees of Diffuser Loading. Zenodo (2018). DOI: ger
dc.description.abstract Increasing the pressure recovery in diffusers is an ongoing endeavour in engineering. In this paper, we analyse, based on extensive numerical simulations and experiments conducted for a wide range of half-opening angles, the effect of boundary layer stability on pressure recovery in diffusers under the influence of an unsteady rotor outflow. We present, based on integral stage design parameters, analytically devised and empirically confirmed correlations for the quantification of additional pressure recovery in diffusers under non-uniform, unsteady inflow conditions and their sensitivity to the half-opening angle. We demonstrate that the sensitivity of the pressure recovery to the half-opening angle is caused mainly by a change of the effective area ratio due to blockage effects and provide a simple ansatz to estimate the magnitude of this effect. The estimate is shown to agree with experimental and numerical data. We define a parameter, based on the diffusion of vorticity, to quantify the processes that stabilise the boundary layer and, for the first time, present a correlation that unites a wide range of different half-opening angles. ger
dc.language.iso eng ger
dc.publisher Zug : Global Power and Propulsion Society
dc.relation.ispartof Proceedings of GPPS Forum 18 ger
dc.rights CC BY-NC-ND 4.0 Unported
dc.subject.ddc 600 | Technik ger
dc.title Increasing Boundary Layer Stability for Varying Degrees of Diffuser Loading eng
dc.type conferenceObject ger
dc.type Text ger
dc.relation.doi 10.5281/zenodo.1345494
dc.description.version publishedVersion ger
tib.accessRights frei zug�nglich

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