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- W2952646633 abstract "Simulations of periodic fluidic excitations in the context of active flow control are per-formed using a frequency domain solver for the efficient prediction of global air loads.Frequency domain methods have become a viable choice whenever the disturbance of theflow is small and periodic, and can reduce the computational effort substantially in compar-ison to time-accurate unsteady simulations. Although time-accurate unsteady simulationsresolve the entire spectrum of the flow, they suffer from a long transient phase and thusrequire an extensive use of computational resources. The goal is to extend the time-linearized frequency domain method of the DLR TAU-code toward load control by blowingfluidic actuators. This paper presents the set of discretized unsteady equations and as-sociated boundary conditions for both the time accurate and frequency domain method.The applied time-linearized frequency method decouples each harmonic, forming a linearapproach, which renders the sequential calculation of the individual harmonics to evaluatethe time response of air loads. At first, blowing actuation for a two-dimensional airfoil witha single slot is considered for which constant as well as periodic excitations are used forvalidation and investigation purposes of air loads between the time-accurate and nonlinearfrequency domain method. In addition, a 2-element high-lift wing with a flow separationon the trailing edge flap is simulated that demonstrates the good prediction quality of airload derivatives with the frequency domain method." @default.
- W2952646633 created "2019-06-27" @default.
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- W2952646633 date "2019-06-14" @default.
- W2952646633 modified "2023-09-26" @default.
- W2952646633 title "Linear Frequency Domain Method for Load Control by Fluidic Actuation" @default.
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- W2952646633 doi "https://doi.org/10.2514/6.2019-3039" @default.
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