Study of Parachute Performance and Design Parameters for High Dynamic Pressure Operation

摘要

Parachute design and performance data were obtained on a series of 24 rocket-powered sled tests. Parachute deployment velocities, ranging between Mach 1.0 and 1.5, were obtained with the Tomahawk parachute test sled operating in either single stage or double stage, pusher configuration. Parachute types that were investigated included Hyperflo, Hemisflo, Reefed Conical Ribbon and Supersonic Guide Surface designs. The data obtained included inflation characteristics, opening shock factors, drag coefficients, inflated areas, stability, canopy temperatures and general structural and aerodynamic design considerations. From this parachute decelerator test program, it may be concluded that the Hyperflo type parachute, both mesh and ribbon roof designs, and the Hemisflo type parachute can be fabricated to withstand and operate successfully in the high dynamic pressure region of 3000 psf. Supersonic reefed operation and disreef to full open was also demonstrated as practical with a Conical Ribbon type parachute design. The test vehicle system including associated deployment and release techniques and the data acquisition system are also discussed. (Author)