An Analytical Study of the Scramjet Exhaust Expansion System. Part IV.
Abstract
The research was designed to study the losses in a scramjet exhaust expansion nozzle and to develop methods of designing the exhaust expansion system to maximize the thrust or minimize the sum of the losses. The overall program includes a literature survey and the development of computer programs for the following purposes: to design optimized axisymmetric and plug nozzles accounting for boundary layer effects, to design axisymmetric nozzles with nonequilibrium chemical reactions, to design axisymmetric nozzles for gas-particle flows, to analyze isentropic flow in a three-dimensional nozzle, to analyze nonequilibrium, chemically reacting flow in three-dimensional nozzles, and to design optimized three-dimensional nozzles. The design problems are formulated using variational calculus to obtain the maximum thrust; the problem constraints are imposed by using Lagrange multipliers. The results of the fifth and final year's effort are summarized. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1971
- Accession Number
- AD0736465
Entities
People
- H. Doyle Thompson
- Joe D. Hoffman
Organizations
- Purdue University