EXTERNAL BURNING RAMJETS PRELIMINARY FEASIBILITY STUDY
Abstract
Experiments and analyses have shown that burning beneath external surfaces of a supersonic vehicle can produce lift and reduce drag. Preliminary analyses of some two-dimensional external burning ramjet (ERJ) and external expansion ramjet (EERJ) models yield some encouraging results. The EERJ uses ducted subsonic combustion but all-external expansion, so that the two- dimensional (or half-round) nozzle obtains some heat relief by radiation and contributes to vehicle lift, increasing lift/drag ratio. Effects of vectoring the EERJ nozzle and advantages and disadvantages of substituting a simple ramp in place of the nonreflecting surface are explored briefly. Three possible paths for the design of hypersonic transport vehicles incorporating EERJ's for cruise power and auxiliary lower speed engines are pictured and discussed in general terms.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1967
- Accession Number
- AD0655459
Entities
People
- G. L. Dugger
- L. Monchick
Organizations
- Johns Hopkins University