Flight Testing on Cirrus Aircraft

Mandziuk, Matthew; Yurk, S.; Grashik, Martin; Liu, Tianshu

doi:10.2514/6.2009-571

Cited by 2 publications

(2 citation statements)

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“…Equation 9is the original form of harmonic balance equations in the frequency domain. One can develop a flow solver based on equation (9). However, the computation of the Fourier residualR is difficult and expensive.…”

Section: Harmonic Balance Methodsmentioning

confidence: 99%

“…Theoretical analysis, experimental investigation, and numerical simulation have been widely employed in dynamic derivative calculation. However, the difficulties involved in conducting tests and high cost prohibit the flight and wind-tunnel testing from common research, [8][9][10][11] and the theoretical calculation ceases to show practicability in complex flows and nonlinear problems. 12 With the recent advances of computer power and computational fluid dynamics (CFD) method, obtaining the dynamic derivatives through numerical calculation has become the most prospective way for current flight quality and stability analysis, and its reliability is expected to approach flight test.…”

Section: Introductionmentioning

confidence: 99%

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Prediction of dynamic derivatives for air-breathing hypersonic vehicle using a harmonic balance method

Chai

Liu

Yang

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part G:

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The harmonic balance method is an efficient frequency-domain approach for computing periodically unsteady flows. Applying harmonic balance method to the rapid calculation of forced periodic motions, an efficient prediction method for dynamic derivatives is established based on the Etkin unsteady aerodynamic model. The method is firstly validated by a standard model of the hypersonic missile hyper ballistic shape, and the harmonic balance method results show great consistency with both time-domain results and experimental data, consolidating the efficiency of our numerical algorithm. The method is subsequently applied for an air-breathing hypersonic vehicle to investigate the capability of the harmonic balance method in modeling unsteady flows around complex geometric configurations. Comparisons with the results of the time-domain method demonstrate that the harmonic balance method is capable of resolving such complicated flowfield with both accuracy and efficiency. To be specific, for the air-breathing hypersonic vehicle, the maximum difference of the dynamic derivatives calculated by the harmonic balance method and the time-domain method is only 6.56%, and the harmonic balance method shows at least an order of magnitude efficiency over the general time-domain method in the current study.

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Section: Harmonic Balance Methodsmentioning

confidence: 99%