ramjet vs. scramjet Click for a side-by-side comparison of meanings. Use the word comparison feature to learn the differences between similar and commonly confused words. Origin of ramjet 1 First recorded in 1940–45;ram1+jet1 Also calledramjet engine. ...
jet engine scramjet See all related content ramjet, air-breathingjet enginethat operates with no major moving parts. It relies on the craft’s forward motion to draw in air and on a specially shaped intake passage to compress the air for combustion. After fuel sprayed into the engine has bee...
The addition of an afterburner allows the turbojet engine to operate at transonic speeds for short periods of time. As shown in Fig. 1.1, for sustained supersonic flight speeds, ramjet or scramjet engines are necessary. These are discussed in this chapter. Keeping the intended audience in ...
A scramjet engine.Scramjet is an acronym for Supersonic Combustion Ramjet. The scramjet differs from the ramjet in that combustion takes place at supersonic air velocities through the engine. It is mechanically simple, but vastly more aerodynamically complex than a jet engine. Hydrogen is normally...
The combination of ramjet and scramjet gives a cycle called a dual-mode ramjet; it is also a very frequently studied engine. • It was the base cycle for the national aerospace plane NASP X-30, which was studied by the Americans. It was intended to use the air-breathing mode up to ...
Whereas high speeds generally cannot be achieved by ramjets without their initially being assisted bya rocket, a scramjet, or supersonic combustion ramjet, can attain high speeds by reducing airflow compression at the entrance of the engine and letting air pass through at supersonic speeds. ...
integralenginedesign,anidealpowercyclemodelforatwo-phaseunderwaterramjetisestablished.Fourperformanceparametersaredefinedtoevaluateoverallperformanceofthetwo-phaseunderwaterramjetsystems:transmissionefficiency,propulsiveefficiency,overallefficiencyandspecificimpulse.Then,ascaled-downexperimen-talramjetengine...
Specially, the engine geometry adjustment variables, which affect the shapes of the inlet cowl and the nozzle undersurface, are treated as additional control variables and are optimized simultaneously in the trajectory optimization. Research shows that, the performance of ramjet/scramjet is improved ...
The US Air Force's (USAF's) Arnold Engineering Development Center (AEDC) conducted a successful first f reejet test onrna dual mode, ramjet/scramjet hypersonic engine in the facility's Aerodynamic and Propulsion Test Unit (APTU) on 9 April.rnThe US Defense Advanced Research Projects Agency'...
A dual mode scramjet engine (20) has an isolator (24) that serves to minimize combustor influence on inlet operation, a combustor (26) for operation in both ramjet and scramjet mode, and a centerbody (30) positioned within the isolator (24). The centerbody (30) has an end at an ...