Reduced Order Gust Response Simulation using Computational Fluid Dynamics

Bekemeyer, Philipp; Timme, Sebastian

doi:10.2514/6.2016-1485

Cited by 14 publications

(15 citation statements)

References 18 publications

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“…Comparisons are shown for three different flow conditions to demonstrate the capability of the ROM for a variety of problems including sub-(S1) and transonic (T1) cases and an additional case exhibiting a shock-induced flow separation (T2). Comparisons of the full order model with a frequency-domain ROM are presented for S1 and T1 in [12]. The Reynolds number based on the chord length is 10 million, while the remaining flow parameters are summarised in Table 1.…”

Section: Resultsmentioning

confidence: 99%

“…The same basis can be used to project the LFD system in eq. (3) onto the POD subspace as shown in [12]. However, there are two advantages of the time-domain ROM over the frequency-domain method.…”

Section: Proper Orthogonal Decompositionmentioning

confidence: 99%

“…An extension to three-dimensional cases, generating snapshots for all structural modes of interest, has also been presented [11]. Recently, this approach was extended towards gust responses and a ROM is presented [12]. The LFD method is first used to generate snapshots of sinusoidal gusts while varying the reduced frequency.…”

Section: Introductionmentioning

confidence: 99%

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Reduced Order Modelling of Gust Analysis Using Computational Fluid Dynamics

Thormann¹,

Bekemeyer²,

Timme³

2016

Proceedings of the VII European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS Congress 2016)

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Section: Resultsmentioning

confidence: 99%

Section: Proper Orthogonal Decompositionmentioning

confidence: 99%

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Reduced Order Modelling of Gust Analysis Using Computational Fluid Dynamics

Thormann¹,

Bekemeyer²,

Timme³

2016

Proceedings of the VII European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS Congress 2016)

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“…However, linear frequency domain based methods, also known as time-linearised methods, have shown large runtime improvements while maintaining the accuracy of the underlying nonlinear CFD model [3]. More commonly used for forced-motion simulations, an extension towards gust excitation has been presented recently for the Reynolds-averaged Navier-Stokes (RANS) equations [4]. Results are shown for an aerofoil at subsonic and transonic flight conditions.…”

Section: Introductionmentioning

confidence: 99%

Linearised Frequency Domain Gust Analysis of Large Civil Aircraft

Bekemeyer¹,

Thormann²,

Timme³

2016

Proceedings of the VII European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS Congress 2016)

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Abstract. Predicting loads due to atmospheric turbulence is crucial in the aircraft design and certification process. Efficient methods are important regarding the large number of simulations needed to cover the parameter space of e.g. Mach number, flight altitude and gust shape. Since commercial aircraft operate at transonic flight speeds, applied methods should consider aerodynamic nonlinearities such as shocks and boundary layer separation. Based on a recently presented method using frequency domain computational fluid dynamics for gust interaction, an extension towards industry-relevant three-dimensional cases is proposed. Results are shown for a large civil aircraft solving the Reynolds-averaged Navier-Stokes equations. Complex-valued surface pressures from time-linearised simulations are compared to nonlinear unsteady timemarching investigations. Responses to 1-cos gusts are obtained to discuss time histories of load factors and worst case surface pressure distributions. 7390P. Bekemeyer, R. Thormann and S. Timme

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“…The method described in the present work has been intended for Linear Frequency Domain Analysis (LFD) 19,20 . However, since LFD for gust were not available in the standard release of the CFD TAU code, when this method was being developed, equivalent frequency domain analysis has been recreated using time domain CFD analysis.…”

Section: Cfd Integrated Loads In the Frequency Domainmentioning

confidence: 99%

A Doublet-Lattice Method Correction Approach for High Fidelity Gust Loads Analysis

Valente¹,

Lemmens²,

Wales³

et al. 2017

58th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference

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This paper presents a new methodology to increase the accuracy of gust loads analysis, evaluated by means of traditional potential flow models. Linearised frequency domain aerodynamic loads have been used to estimate the correction factors necessary to update the Aerodynamic Interference Coefficients matrices for gust and mode shapes deformation. The results, obtained using a corrected doublet-lattice method, are presented and compared to the fully coupled CFD/FEM results computed with a Fluid Structure Interaction interface. The application of this technique to a wing model, representative of a general single aisle civil aircraft, has shown an excellent agreement to the fully coupled results, both for rigid and flexible aerodynamic loads in the transonic regime.

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Reduced Order Gust Response Simulation using Computational Fluid Dynamics

Cited by 14 publications

References 18 publications

Reduced Order Modelling of Gust Analysis Using Computational Fluid Dynamics

Reduced Order Modelling of Gust Analysis Using Computational Fluid Dynamics

Linearised Frequency Domain Gust Analysis of Large Civil Aircraft

A Doublet-Lattice Method Correction Approach for High Fidelity Gust Loads Analysis

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