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Computation of the stability derivatives via CFD and the sensitivity equations

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Abstract

The method to calculate the aerodynamic stability derivates of aircrafts by using the sensitivity equations is extended to flows with shock waves in this paper. Using the newly developed second-order cell-centered finite volume scheme on the unstructured-grid, the unsteady Euler equations and sensitivity equations are solved simultaneously in a non-inertial frame of reference, so that the aerodynamic stability derivatives can be calculated for aircrafts with complex geometries. Based on the numerical results, behavior of the aerodynamic sensitivity parameters near the shock wave is discussed. Furthermore, the stability derivatives are analyzed for supersonic and hypersonic flows. The numerical results of the stability derivatives are found in good agreement with theoretical results for supersonic flows, and variations of the aerodynamic force and moment predicted by the stability derivatives are very close to those obtained by CFD simulation for both supersonic and hypersonic flows.

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Authors and Affiliations

  1. Department of Engineering Mechanics, Tsinghua University, 100084, Beijing, China

    Guo-Dong Lei & Yu-Xin Ren

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  1. Guo-Dong Lei
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  2. Yu-Xin Ren
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Correspondence to Guo-Dong Lei.

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Lei, GD., Ren, YX. Computation of the stability derivatives via CFD and the sensitivity equations. Acta Mech Sin 27, 179–188 (2011). https://doi.org/10.1007/s10409-011-0426-z

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  • DOI: https://doi.org/10.1007/s10409-011-0426-z

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