Optimal Loading of a Tension Kite

Jackson, Peter S.

doi:10.2514/1.3543

Cited by 11 publications

(7 citation statements)

References 14 publications

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“…Sanchez [22] has started from Lagrangian equations of motion to formulate a model for longitudinal dynamics of a kite and uses this to develop a controller for this symmetric flight mode. Stevenson [23] deals with the existence of possible static equilibrium points and Jackson [24] investigates the shape of the kite in relation to its optimal loading using a static analysis based on Prandtl's lifting line theory.…”

Section: Introductionmentioning

confidence: 99%

Flight Dynamics and Stability of a Tethered Inflatable Kiteplane

Terink

Breukels

Schmehl

et al. 2011

Journal of Aircraft

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The combination of lightweight flexible membrane design and favorable control characteristics renders tethered inflatable airplanes an attractive option for high-altitude wind power systems. This paper presents an analysis of the flight dynamics and stability of such a Kiteplane operated on a single-line tether with a two-line bridle. The equations of motion of the rigid body model are derived by Lagrange's equation, which implicitly accounts for the kinematic constraints due to the bridle. The tether and bridle are approximated by straight line elements. The aerodynamic force distribution is represented by 4 discrete force vectors according to the major structural elements of the Kiteplane. A case study comprising analytical analysis and numerical simulation reveals, that for the specific kite design investigated, the amount and distribution of lateral aerodynamic surface area is decisive for flight dynamic stability. Depending on the combination of wing dihedral angle and vertical tail plane size, the pendulum motion shows either diverging oscillation, stable oscillation, converging oscillation, aperiodic convergence, or aperiodic divergence. It is concluded that dynamical stability requires a small vertical tail plane and a large dihedral angle to allow for sufficient sideslip and a strong sideslip response.

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Section: Introductionmentioning

confidence: 99%

Flight Dynamics and Stability of a Tethered Inflatable Kiteplane

Terink

Breukels

Schmehl

et al. 2011

Journal of Aircraft

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“…Diameter of the rope kite trace can be simply estimated as a two-dimensional equilibrium of the force acting on the rigid kite system at a given moment using a circular cylinder (Jackson, 2005;Williams et al, 2007;Vaikil and Green, 2009), as shown in Fig. 6.…”

Section: Resultsmentioning

confidence: 99%

Performance of an Active Stimulating Device Using a Rope Kite or Array in the Cod End to Reduce Juvenile by-catch

Kim¹

2010

Fisheries and aquatic sciences

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An active stimulating device (ASD) using a rope apparatus may operated by the flow of turbulence inside a cod end, generating variable stimuli in addition to flow-related effects to minimize the bycatch of juvenile fishes. Preliminary testing involved a hydrodynamic effect inside the cod end with a rotating rope kite or conical rope array to generate variable stimuli (visual stimuli, water flow, or physical contact with fish) to change fish position. The experimental rope kite offered more choice in rotating period and range of sweeping action; adjusting the towing line or flow velocity helped to drive fish toward the net panel and encouraged escape. The conical shape of the rope array in the cod end helped to clear a path for fish by disturbing the rigging and providing more contrast between objects, preventing an optomotor response. This enabled more black porgy to be herded toward the net at an early stage of towing. Therefore, either a conical rope array or a rotating rope kite can be used as an effective ASD to prevent juvenile by-catch.

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“…These data can be evaluated experimentally (De Wachter 2008;Dadd et al2010;Behrel et al 2018ab;Roncin et al 2020) or numerically by means of methods like lifting line (Leloup et al 2012;Duport et al 2015;Jackson et al 2005), VLM (Gohl et al 2005), panel methods or RANSE (Reynolds-Average Navier-Stokes Equations) simulation (de Wachter 2008;Duport et al 2015;Maneia et al 2013).…”

Section: State Of the Artmentioning

confidence: 99%

Influence of Kite Characteristics on Propulsive Power Applied to Ship Auxiliary Propulsion

Penloup¹,

Roncin

Parlier³

2021

Journal of Sailing Technology

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A Design of Experiment method was applied combined with a performance prediction program to assess the influence of four design parameters on the propulsive capacity of kites used as auxiliary propulsion for merchant vessels. Those parameters are the lift coefficient, the lift to drag ratio or drag angle, the maximal load bearable by the kite and the ratio of the tether length on the square root of the kite area. These parameters are independent from the kite area and, therefore, they could be used with various kite ranges and types. The maximum wing load parameter is the one that shows the most influence on the propulsive force. Over 50% of the gains obtained through this study are directly attributable to it. Then the ratio of the tether length on the square root of the kite area comes as the second greatest influence factor for true wind angles above 70°. While the drag angle is more influential for the narrower angles. In fact, the most substantial gains are made upwind.

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Optimal Loading of a Tension Kite

Cited by 11 publications

References 14 publications

Flight Dynamics and Stability of a Tethered Inflatable Kiteplane

Flight Dynamics and Stability of a Tethered Inflatable Kiteplane

Performance of an Active Stimulating Device Using a Rope Kite or Array in the Cod End to Reduce Juvenile by-catch

Influence of Kite Characteristics on Propulsive Power Applied to Ship Auxiliary Propulsion

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