Inlet vortex alleviation

Funk, Robert; Parekh, David; Smith, D. M.; Dorris, John

doi:10.2514/6.2001-2449

Cited by 7 publications

(4 citation statements)

References 3 publications

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“…Ground vortices can, however, be formed also in the absence of any ambient flow. [10][11][12][13][14] Yet, in both cases, the flow generated by the sucked air is similar, which has been confirmed experimentally 15 and computationally.…”

Section: Introductionsupporting

confidence: 64%

Aerodynamics of intakes of high bypass ratio (hbpr) turbofan engines

El-Sayed¹,

Emeara²

2020

IRATJ

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Section: Introductionsupporting

confidence: 64%

Aerodynamics of intakes of high bypass ratio (hbpr) turbofan engines

El-Sayed¹,

Emeara²

2020

IRATJ

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“…Previous investigations suggested that inlet vortex is highly unsteady (Brix et al 2000;Funk et al 2001;Secareanu et al 2005;MacManus 2011a, 2011b). The present time-accurate PIV measurements at the inlet entrance indicate that the inlet vortex was meandering.…”

Section: Inlet Vortex Meanderingmentioning

confidence: 98%

“…Brix et al (2000) observed unsteadiness in their hot-wire measurements. Funk et al (2001) noted unsteadiness in flow visualization and PIV measurements of the inlet vortices, however these were not quantified. Karlsson and Fuchs (2000) performed Large Eddy Simulations of the unsteady characteristics of vortex systems between the engine inlet and the ground under headwind condition.…”

Section: Introductionmentioning

confidence: 98%

Unsteady characteristics of inlet vortices

Wang

Gursul

2012

Exp Fluids

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An experimental study of the unsteady characteristics of inlet vortices has been conducted using a high-frame-rate digital particle image velocimetry (DPIV) system. The results revealed the formation of a pair of counter rotating inlet vortices for the no-wind configuration and one single inlet vortex when there was crosswind. In all measurement = Circulation (m 2 /s) ω y = Vorticity in the vertical plane perpendicular to the axis of the inlet model (s-1) ω z = Vorticity in the horizontal planes parallel to the ground (s-1

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“…A group of researchers from MIT [13] discussed a mechanism of formation of these vortices. Ground vortices can, however, be formed also in the absence of any ambient flow [14][15][16][17]. Yet, in both cases the flow generated by the sucked air is similar, which has been confirmed experimentally (De Siervi et al, [18]) and computationally.…”

Section: Ground Vortexmentioning

confidence: 61%

Aero-Engines Intake: A Review and Case Study

El-Sayed¹

2016

J Robot Mech Eng Resr

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This paper presents an aerodynamic review for intakes of aero-engines. Classification of different types is introduced for both subsonic and supersonic aircrafts. Important parameters influencing intake performance like pressure recovery and spillage drag are discussed. In addition, crucial performance issues such as the angle of attack, ground vortex, swirl flow, noise propagation and icing are presented. These are critical issues which are carefully considered by airframe rather than engine manufacturers. Intake icing may be extremely dangerous and leads to drastic decrease in air mass flow and consequently aircraft propulsion.Calculation of intake performance is explained. The effect of intake performance on the whole engine performance is highlighted. Numerical analyses for present and previous researches are explained and critical parameters are identified.Finally, a case study resembling the intake of a high bypass ratio turbofan engine (in close similarity to that of GE CF-6 Turbofan Engine) is numerically analysed using the commercial code "ESI-CFD 2010" is thoroughly described and analysed. This paper is the first of a series of research work that will cover several R & D activities in HBPR and future EBPR turbofan intakes.

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Inlet vortex alleviation

Cited by 7 publications

References 3 publications

Aerodynamics of intakes of high bypass ratio (hbpr) turbofan engines

Aerodynamics of intakes of high bypass ratio (hbpr) turbofan engines

Unsteady characteristics of inlet vortices

Aero-Engines Intake: A Review and Case Study

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