加油机喷流对受油机的气动干扰机理

The jet effect in aerial refueling was studied in hose-drogue after body (HDB), hose-drogue after pod (HDP) and flying boom (FB) refueling methods, based on structured multi-block grid and Reynolds-averaged Navier-Stokes(RANS) equations. This numerical method was verified by turbine powered simulation (TPS) and DLR-F6 cases. Compared with no jet situation, the mechanism of aerodynamic interference was explored in three different methods. Result showed that, the lift coefficient, drag coefficient and pitch down moment of receiver were larger than the case without jet flow. The receiver in FB refueling method was slightly affected, while the lateral characteristic in HDP refueling method was changed severely by jet. The increase of dynamic pressure, the change of local flow angle and the ejecting effect were main phenomena caused by jet flow, which resulted in remarkable pressure change on receiver. Moreover, the local flow angle was changed by acceleration effect and the wake vortex dissipated by jet.