PERFORMANCE EVALUATION OF AN AEROJET-GENERAL CORPORATION EXPANDABLE NOZZLE EXTENSION AND A NON-RIGID CONICAL NOZZLE EXTENSION AT SIMULATED ALTITUDES
Abstract
Presented is the design of the expandable nozzle extension and the non-rigid conical nozzle exten sion. These unusual nozzle extensions were evaluated at simulated pressure altitudes up to 108,000 ft. The stainless steel expandable nozzle extensions, which attached to a 7:1 area ratio fixed nozzle, were cylindrical prior to testing. The extensions expanded to a conical configuration and maintained this configuration during the rocket engine firing. Area ratios from 32:1 to 37:1 were achieved during the rocket engine steady-state operation, and the thrust coefficients obtained were 96 percent of the theoretical values. The conical non-rigid (rubber) nozzle extensions evaluated at pressure altitude conditions were flexible, having both constant and tapered wall thicknesses and nominal area ratios of 40:1. The non-rigid nozzle exten sion with the thickest constant wall (7/16 in.) was stable during the rocket engine firing; how ever, other non-rigid nozzle extensions were un stable and oscillated. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1963
- Accession Number
- AD0343065
Entities
People
- J.f. Defb
- R.e. Smith
Organizations
- Arnold Engineering Development Complex