Affiliation of Author(s):航空学院
Journal:Hangkong Xuebao
Abstract:Steady low speed preconditioning is of poor convergence in dual-time iterations, and unsteady low speed preconditioning automatically reverts back to no preconditioning in numerical simulation of rotor aerodynamic interaction. To overcome these problems, we conduct an order analysis to blend the steady and unsteady low speed preconditioning eigenvalues matrices based on the unsteady low speed preconditioning framework. A new Blend low speed preconditioning method is developed from altering the dissipation formulation using this matrix. The unsteady flow around the circular cylinder, unsteady rotor-fuselage aerodynamic interaction in the helicopter forward and coupling ship/rotor flowfields are simulated to validate the proposed method. The numerical results indicate that the proposed method can solve the problem of automatical reversion of unsteady low speed preconditioning back to no preconditioning, and can improve significantly convergence of steady low speed preconditioning. © 2018, Press of Chinese Journal of Aeronautics. All right reserved.
ISSN No.:1000-6893
Translation or Not:no
Date of Publication:2018-08-25
Co-author:Xia Jian,Shuling Tian
Correspondence Author:cl
Date of Publication:2018-08-25