Abstract:
During rocket launching, the radome undergoes air flow swashing because of the protrusion of the satellite hermetic cabin surface. Inorder to accurately design mechanical environment over the radome, the aerodynamic loads of the ascending radome are required to be calculated and analyzed. The maximal dynamic pressure appears at a Mach number of 1.4 according to the detailed trajectory parameters. Based on this behavior, the Mach number range of
Ma=1.0~1.8 was chosen for maximum dynamic pressure, and numerical method was used to calculate the power load and torque load of the radome at different Mach numbers and different angles of attack. The results indicate that the power load and torque load of the radome increase at the beginning, and then decrease at ascending branch with
Ma=1.0~1.8. The power load achieves maximum value of about 435.5N at
Ma=1.2, and the torque load achieves maximum value of about 14.5Nm at
Ma=1.4. The power force grows slowly as the angle of attack increases. During actual flight, local or all of the radome is submerged at the boundary layer of the rocket body, so that the existence of the rocket body influences the angle of attack effect of the radome.