抄録
Supersonic parachute are investigated in supersonic wind tunnel. A new type of device for the model support is employed to reduce the aerodynamic interference to the parachute model and compared with typical strut support. There are three types of parachutes which differences are canopy fabric types and trailing distance x/d: Case A is made from nylon fabric and x/d=10; Case B is made from nylon fabric and x/d=5; and Case C is made from elastic polyester fabric and x/d=10. In this research, the elastic polyester has high flexibility than nylon and Case A is treated as the reference case. As a result, the motion of Case C parachute with high flexibility has 35% lower peak frequency and 17% lower amplitude of oscillation than reference case A. Case A has 42% lower peak frequency than pendulum oscillation model because of the external force caused by pressure of outside canopy increasing due to shock/shock interaction between oblique shock wave and bow shock from canopy edge. Comparing Case A (wire support) with strut support, double pendulum oscillation occurs in Case A because constraint condition is unclear at parachute connecting part.
