Development of a Rotary Wing Navier-Stokes CFD Code Based on TLNS3D Code

摘要

This report documents the development of a multi-grid Navier-Stokes code forrotary wing calculations, TLNS3DR. The TLNS3DR is based on the fixed-wing TLNS3D code by adding a rotation term and making necessary modifications on boundary conditions. The TLNS3D code solves the thin-layer Navier-Stokes equations using an explicit multistage Runge-Kutta type of time stepping with multigrid method. The TLNS3DR code re-formulates the TLNS3D code in the rotor blade-fixed moving frame of reference and solves relative motion of fluids. In this report, the formulation of the Navier-Stokes equations in the moving frame of reference in terms of relative velocity is given. Several numerical examples are then presented. The results of rotor blade in hover calculated by the new TLNS3DR code seems quantitatively correct. The computation also shows that this multigrid code is efficient. (AN).