Studies on Aero Thermodynamics performance in the Gap between the Base Side and Baseboard of Air Rudders in Arc Wind Tunnel

摘要

The experimental studies on aero thermodynamic performance in the gap between the base side and the baseboard of air rudders were conducted in the arc wind tunnel. The height of the gap was between 3mm and 5mm and the deflection angles of the rudder were respectively 0°,10°and 35°. In the experiments, some parameters such as the cold wall heat fluxes, the static pressures on the baseboard and the rudder post in the gap were measured. The results showed that the cold wall heat fluxes on the baseboard were relatively smaller and first decreased little by little, afterwards, increased to the highest at the rudderpost along the flow when the deflection angle was 0°; On the other hand, the cold wall heat fluxes on the baseboard quickly increased when the deflection angle was more than 0° , especially for those on the rudderpost, and the cold wall heat fluxes and the static pressures on the baseboard became more and more as the deflection increased because of the interaction by the rudder surface and the board. Meanwhile, the ratio of the cold wall heat fluxes on the rudder post and those on the leading edges of the rudder at the same the horizontal position were found with different total enthalpies.