Ramjet and scramjet engines are jet engine variants that ditch the rotary compressor and turbine from a regular jet engine. The two models rely on the natural ramming of air to produce thrust. The basic operating principle in ramjets and scramjets involves converting the significant kinetic energy...
A ramjet engine.A ramjet has no moving parts and achieves compression of intake air by the forward speed of the air vehicle. Air entering the intake of a supersonic aircraft is slowed by aerodynamic diffusion created by the inlet and diffuser to velocities comparable to those in a turbojet ...
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 ...
题目: 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...
Combustion Efficiency, Flameout Operability Limits and General Design Optimization for Integrated Ramjet-Scramjet Hypersonic Vehicles High speed, air-breathing hypersonic vehicles encounter a varied range of engine and operating conditions traveling along cruise/ascent missions at high al... C Mbagwu 被引...
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 ...
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 ...
Engine Test (FaCET) article has two operating modes, so could power a flight vehicle through supersonic airspeeds out to hypersonic flight.rnMatthew Bond, the USAF manager for the APTU, said: "The most critical issue in a turbine engine, or a ramjet is making sure you can manage the ...
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 ...
"RAMSCRAM - A Flexible Ramjet/Scramjet Engine Simulation Program." NASA TM-102451. June, 1990.Burkardt, L.A.; Franciscus, L.C.: RAMSCRAM - A Flexible Ramjet/Scramjet Engine Simulation Program. NASA TM-102451, 1990Burkardt L A,Franciscus L C.RAMSCRAM-A Flexible Ramjet/Scramjet Engine ...