Browse

Optimal Flow Control Using Unsteady Sensitivity Analysis

Cited 1 time in Web of Science Cited 1 time in Scopus
Authors
Kim, Hyoung-Jin; Kim, Chongam; Rho, Oh-Hyun
Issue Date
2005-07
Publisher
日本航空宇宙學會 = The Japan Society for Aeronautical and Space Sciences
Citation
Trans. Japan Soc. Aero. Space Sci (2005), pp.102-109
Keywords
flow controlunsteady sensitivity analysisadjoint method
Abstract
The present paper investigates methods to control dynamic stall using an optimal approach. Exploiting an unsteady aerodynamic sensitivity analysis based on a direct differentiation method from a two-dimensional unsteady compressible Navier–Stokes solver including a two-equation turbulence model, dynamic-stall control is conducted by minimizing an objective function defined at an instant instead of integrating for a period of time. Unsteady sensitivity derivatives of the objective function are calculated by the sensitivity code, and then optimization is carried out using a linear line search method at every physical time step. Adopting several control parameters such as nose radius, and maximum thickness of airfoil and suction, their effects on the delay or suppression of dynamic stall are examined in detail. Numerous results and comparisons indicate that the present approach yields predictive and more efficient results compared to conventional methods, and suction near the leading edge is essentially more effective than the geometric changes of airfoil in controlling dynamic stall.
ISSN
0549-3811
Language
English
URI
http://hdl.handle.net/10371/6939
DOI
https://doi.org/10.2322/tjsass.48.102
Files in This Item:
Appears in Collections:
College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Mechanical Aerospace Engineering (기계항공공학부)Journal Papers (저널논문_기계항공공학부)
  • mendeley

Items in S-Space are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse