Numerical Simulation Of Fluid-solid-heat Multiple Physical Fields In Airfoil

With the integration and complication of engineering technology, the analysis of singlephysical field couldn’t match the demand of technology. In traditional calculating methods,airfoil are often treated as rigid body, but the interaction between airflow and airfoil structuremay directly affect the mechanical，thermal and others properties of the airfoil. Aerodynamicforce, inertia force, elastic force and thermal stress must be considered in theaerothermoelasticity analysis of airfoil. In some case, these may have a significant influenceon material performance; therefore, it is important to predict material performance of airfoil inthe coupled physical field to confirm the safe flight condition.Recent years, Current research has turned towards the application of computational fluiddynamics (CFD) models to solve the aeroelastic and using computational structure dynamics(CSD) models to analyze mechanical and vibration characteristics of airfoil. By using anunsteady Euler or Navier-Stokes (N-S) CFD algorithm coupled with CSD solver, the completeaeroelastic response of the structure can be preliminary predicted.1. By using MpCCI, a CSD/CFD co-simulation method is presented, which is used forputting up a multi-physics coupled platform to solve the aerothermoelasticity problem of2Dand3D airfoil model with high efficiency and flexibility. The calculating process of coupledfields is described, and attention has been focused on the transfer of information betweenfluid and structure grids. MpCCI enables a direct communication between the coupled codesby providing adapters for a growing number of commercial codes. This technique allowsputting up a coupled platform to different dimensions and multi-physics problems.2.2D/3D fluid and structure models of NACA0012airfoil are created, which arecalculated on steady fluid-solid-heat coupling simulation. Comparing the coupled results withthe uncoupled results and results under different flight velocity, the rationality andconvergency of the co-simulation method using MpCCI are verified.3. The influence of different grid type and size on co-simulation is compared, and thedifference of using various data exchange methods is discussed. A three-dimensional movinggrid approach is presented to remesh the fluid grid when the airfoil structure is highlydeformed, to avoid bad mesh quality and calculation aborting.