Capability of state-of-the-art navier-stokes solvers for the prediction of helicopter fuselage aerodynamics

摘要

The purpose of this paper is to describe the influence of different Navier-Stokes solvers and grids on the prediction of the global coefficients for a simplified geometry of a helicopter fuselage. The calculations were conducted in the BRITE/EURAM HELIFUSE project in parallel at 3 National Research Institutes (DLR, ON-ERA and CIRA). 3 Helicopter Manufactures (AGUSTA, EUROCOPTER and GKN-WHL), 1 Software Company (SIMULOG) and 2 Universities (DTU and IAG). The objective of this paper is to analyze and explain the discrepancies observed between the numerical results and experimental data in a first stage of comparison exercise. For this purpose calculations using the same solver on different grids and computations with different solvers using one common grid have been conducted. A grid dependence is found to be one source. The calculations of different solvers on one grid have shown a similar influence on the predicted drag values as was observed in the calculation s using one solver with different grids.