The control of vortical lift on delta wings by tangential leading edge blowing

Wood, N. J.; Roberts, Leonard

doi:10.2514/6.1987-158

Cited by 25 publications

(17 citation statements)

References 2 publications

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“…As a result, LEV formation is delayed to η = 0.55, which results in the pitch-down moment. The reattachment of LEV is in agreement with previous reports by Wood and Roberts [24] who carried out the wind tunnel test using a simple geometric delta wing. The delay in LEV formation is also observed with the tuft visualization, as shown in Fig.…”

Section: Full Actuationsupporting

confidence: 91%

Active Flow Control on a UCAV Planform Using Synthetic Jets

Lee¹,

Lee²,

Kim³

et al. 2016

International Journal of Aeronautical and Space Sciences

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This paper deals with experimental investigation of active flow control via synthetic jets using an unmanned combat air vehicle (UCAV) planform. Fourteen arrays of synthetic jets, mounted along both leading edges, were fully or partially activated to increase aerodynamic efficiency and reduce pitch-up moment. The measurements were carried out using a six-component external balance, a pressure scanner, and tuft flow visualization. It was observed that aerodynamic efficiency (L/D) and pitching moment were clearly affected by the location of jets. In particular, inboard and outboard actuation could effectively increase L/D. Moreover, inboard actuation showed a reduction in the pitch-up, even more than that generated by the full actuation. These results suggest that inboard actuation not only effectively increases L/D but also reduces the pitch-up using only a few actuators.

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Section: Full Actuationsupporting

confidence: 91%

Active Flow Control on a UCAV Planform Using Synthetic Jets

Lee¹,

Lee²,

Kim³

et al. 2016

International Journal of Aeronautical and Space Sciences

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“…The fences were also less e!ective at high angles of attack as shown by Shah (1991), Lee et al (1990), and Meyn & James (1993). Some attempts have been made by Wong et al (1994) and Wood & Roberts (1988) to control the leading-edge vortices using tangential leading-edge blowing (TLEB), see Figure 2. The TLEB is aimed to delay #ow separation around rounded edges, and consequently the vortex breakdown by the means of Coanda e!ect.…”

Section: Introductionmentioning

confidence: 99%

Active Vortical Flow Control for Alleviation of Twin-Tail Buffet of Generic Fighter Aircraft

Sheta

Harrand

Huttsell

2001

Journal of Fluids and Structures

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“…8. In this work, efficiency is defined as (10) In all run cases, it is exhibited that as the injection angle increases, the efficiency increases. As shown in Fig.…”

Section: Hydrody Namic Char Acteristics and Efficiency Ratiomentioning

confidence: 99%

“…Wood and Nielsen [9] conducted a literature review regarding this issue. Wood and Robert [10] also presented a blowing method for controlling the lift of Delta Wings. Wood et al [11] proposed another control method for increasing the efficiency of aerofoils.…”

Section: Introductionmentioning

confidence: 99%

Effects of Boundary Layer Control Method on Hydrodynamic Characteristics and Tip Vortex Creation of a Hydrofoil

Ghadimi

Tanha

Kourabbasloo

et al. 2017

Polish Maritime Research

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There is currently a significant focus on using boundary layer control (BLC) approach for controlling the flow around bodies, especially the foil sections. In marine engineering this is done with the hope of increasing the lift -to -drag ratio and efficiency of the hydrofoils. In this paper, effects of the method on hydrodynamic characteristics and tip vortex formation of a hydrofoil are studied. Steady water injection at the tip of the hydrofoil is simulated in different conditions by using ANSYS-CFX commercial software. Validity of the proposed simulations is verified by comparing the obtained results against available experimental data. Effects of the injection on the lift, drag, and lift -to -dragratio are studied and the ranges within which the injection has the most positive or negative effects, are determined. Furthermore, flow pattern and pressure variation are studied upon the water injection to determine the most positive and negative case and to ascertain the main reasons triggering these phenomena.

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The control of vortical lift on delta wings by tangential leading edge blowing

Cited by 25 publications

References 2 publications

Active Flow Control on a UCAV Planform Using Synthetic Jets

Active Flow Control on a UCAV Planform Using Synthetic Jets

Active Vortical Flow Control for Alleviation of Twin-Tail Buffet of Generic Fighter Aircraft

Effects of Boundary Layer Control Method on Hydrodynamic Characteristics and Tip Vortex Creation of a Hydrofoil

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