Discrete Adjoint based Sensitivity Analysis for Optimal Flow Control of a 3D High-Lift Configuration
Discrete Adjoint based Sensitivity Analysis for Optimal Flow Control of a 3D High-Lift Configuration
复制标题
基于离散伴随的灵敏度分析，用于 3D 高升力配置的最佳流量控制
DOI：
10.2514/6.2013-2585
复制
发表时间：
2013
影响因子：
2.9
通讯作者：
F. Thiele
中科院分区：
文献类型：
--
作者：
Anil Nemili;Özkaya Emre;N. Gauger;F. Kramer;A. Carnarius;F. Thiele
主动流动控制技术用于延迟或防止高升力结构襟翼上的湍流分离。通过寻找一组最优的驱动参数，可以实现有效的分离控制，从而提高升力。本文以求出最优驱动参数集为目标，建立了三维一致非定常离散伴随RANS求解器。将伴随代码应用于实际相关的三维大扬程结构的灵敏度分析。用有限差分法比较了基于一致伴随法的驱动参数对灵敏度的影响。研究了冻结湍流假设对驱动灵敏度精度的影响。
Active flow control techniques are used to delay or prevent the turbulent flow separation on the flap of a high-lift configuration. Effective separation control and thus lift enhancement can be achieved by finding the optimal set of actuation parameters, which may be in very large number. In this paper, a consistent unsteady discrete adjoint RANS solver in three-dimensions is developed towards the objective of finding the optimal set of actuation parameters. The adjoint code is applied to the sensitivity analysis of a practically relevant three-dimensional high-lift configuration. The sensitivities with respect to actuation parameters based on the consistent adjoint approach are compared with finite differences. The effect of frozen turbulence assumption on the accuracy of actuation sensitivities is studied.