Developing an Accurate CFD Based Gust Model for the Truss Braced Wing Aircraft

Bartels, Randy A.

doi:10.2514/6.2013-3044

Cited by 9 publications

(9 citation statements)

References 23 publications

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“…Comparison of the CFD and ROM predicted lift and moment coefficients (131) . Figure 13 shows a comparison of time histories of the normalised lift and moment coefficients of a truss braced wing aircraft given by the ROM model and the FUN3D simulation for the one-minus-cosine gust conducted by Bartels (131) . The FUN3D was originally developed by NASA where gust modeling capability is embedded with the FVM approach (130) .…”

Section: Representative Resultsmentioning

confidence: 99%

Gust loads on aircraft

Cao

Ismail

2019

Aeronaut. j.

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An important prerequisite for the design, assessment and certification of aircraft and their associated control systems is a quantitative specification of the environment in which the aircraft is intended to operate, for example, atmospheric gust. Gust loads on aircraft may induce detrimental influences such as increased aerodynamic and structural loads, structural deformation and decreased flight dynamic performance. This paper presents a systematic and comprehensive overview of important concepts and applications of gust loads on aircraft. This overview includes a brief research background, concepts, research techniques, influences and load alleviation measures of gust. Finally, we summarise some potential improvements in the future work. It is also recommended to learn from previous experiences to avoid aviation accidents due to flight through atmospheric gusts and turbulence.

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Section: Representative Resultsmentioning

confidence: 99%

Gust loads on aircraft

Cao

Ismail

2019

Aeronaut. j.

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“…Furthermore, it fully accounts for the mutual interactions between the gust and the aerofoil. This is in contrast to the Field Velocity Method (FVM) 3,4 which neglects the additional gust source terms that exist in the SVM equations. In both methods the grid time metrics are modified to physically introduce the motion of the gust throughout the computational domain, without actually moving the grid itself.…”

Section: B Split Velocity and Field Velocity Methodsmentioning

confidence: 94%

Linear Frequency Domain Reduced Order Modelling of Aerofoil Gust Response

Bagheri¹,

Jones²,

Gaitonde³

2016

46th AIAA Fluid Dynamics Conference

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A method for constructing reduced order models of an aerofoil subject to gusts is presented. The method is based on subspace system identification in the frequency domain in order to obtain a model which retains the dynamic information of the original system, while having a comparatively smaller dimension. The gust is prescribed through the domain using the split velocity method to obtain the system frequency response. This is used to find the state matrices of the reduced system. By prescribing a series of 1-cosine gusts, it is shown that the reduced system obtained agrees well with the original system.

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“…Simulation technique based on computational fluid dynamics (CFD) [5][6][7][8][9][10][11][12] is a very popular and important way to understand some assumptions on the gust loads and verify the accuracy of prediction. In the work of Parameswaran, Baeder and Singh et al [8,9], unsteady Euler/Navier-stokes solver was directly used to compute not only the indicial responses of an airfoil in regard to step changes in attack angle and pitch rate, but also the penetration of a sharp-edged gust through exerting perturbation to flow fields.…”

Section: Introductionmentioning

confidence: 99%

Aerodynamic response of micro rotary wings in wind perturbation

Xu¹,

Wu²,

Chai³

2018

J. vibroeng.

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One high fidelity numerical method is extended to compute the unsteady aerodynamic loads when micro rotary wings suffer wind. The unsteady solutions are obtained by solving Navier-Stokes equations, where field velocity method is proposed to carry out the atmospheric perturbation. The convective terms are approximated by a high order WENO-Roe scheme, and time advance is performed by an implicit scheme of dual time stepping which can guarantee a degree of efficiency. Moving overset grids are used to facilitate the implement of rotational motion of rotary wings and relative movements between rotary wings, as well as the atmospheric perturbation. The results reveal that small atmospheric perturbation has an important impact on the flows of micro rotary wings under low Reynolds number. The response of thrust coefficient presents periodic fluctuation and its amplitude is proportional to that of wind disturbance, which provides the clue for active control research of rotary wing aircraft.

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Developing an Accurate CFD Based Gust Model for the Truss Braced Wing Aircraft

Cited by 9 publications

References 23 publications

Gust loads on aircraft

Gust loads on aircraft

Linear Frequency Domain Reduced Order Modelling of Aerofoil Gust Response

Aerodynamic response of micro rotary wings in wind perturbation

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