Propeller Slipstream Development

Roosenboom, Eric; Heider, André; Schröder, Andreas

doi:10.2514/6.2007-3810

Cited by 2 publications

(2 citation statements)

References 5 publications

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“…They proposed to install the nacelle over the wing in order to reduce the adverse effects. Secondary flow vorticies were observed by Roosenboom (9) in the propeller slipstream. In contrast, it was also shown by Witkowski (10) that the propeller downstream has improving effects on the wing lift.…”

Section: Introductionmentioning

confidence: 90%

Aerodynamic investigation of S-duct intake for high power turboprop installed on a channel wing

2017

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Installation effects on the S-duct intakes of a high power turboprop were investigated by comparing three different nacelle configurations as the channel wing, over-the-wing and conventional tractor wing using computational fluid dynamic methods. The interaction of the propeller, the wing, and the nacelle on the scoop type turboprop intakes were identified in terms of recovery and distortion on the aerodynamic interface planes. An actuator disc model was used to simulate the propeller downstream effects. The channel wing installation of S-ducts showed approximately 2% higher total pressure recovery than the other configurations. The channel wing configuration with a wrap-around S-duct experienced a 2% lower circumferential distortion intensity, whereas over-the-wing had an increase by 3% in comparison to the tractor wing. It was also observed that the S-duct type had a greater influence on the radial distortion intensity than the installation type. The swirl coefficient distribution showed that multiple peaks occurred as opposed to swirl results based on a single sector of the aerodynamic interface plane. The difference between swirl peaks of shaft penetration S-duct was reduced by 14% when installed on channel wing, whereas the peaks of wrap-around experienced 90° phase shift, and their difference showed 10% increase on channel wing.

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Section: Introductionmentioning

confidence: 90%

Aerodynamic investigation of S-duct intake for high power turboprop installed on a channel wing

2017

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“…The flow topology stemming from a rotating propeller has typical vortical structures, see for example figure 1. Roosenboom et al (2007).…”

Section: Introductionmentioning

confidence: 99%

Qualitative investigation of a propeller slipstream with Background Oriented Schlieren

Roosenboom¹,

Schröder²

2009

J Vis

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The Background Oriented Schlieren (BOS) method has been used to qualitatively identify the (variation of) density gradients in the helical structure of a propeller slipstream. The helical structures are identified for two sideslip angles. In contrast to standard BOS correlations between exposures and a reference image, two exposures at a given time interval were cross-correlated. This revealed a more clear description of the propeller slipstream as it determines the variation of the density gradient during this interval. It enhances the visualization of the helical structure of the propeller slipstream. Based on the visualizations of the blade tip vortex trajectories the propeller slipstream contraction can be estimated.

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Propeller Slipstream Development

Cited by 2 publications

References 5 publications

Aerodynamic investigation of S-duct intake for high power turboprop installed on a channel wing

Aerodynamic investigation of S-duct intake for high power turboprop installed on a channel wing

Qualitative investigation of a propeller slipstream with Background Oriented Schlieren

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