The active cooling of the Supersonic Combustion Ramjet engine, for hypersonic flight purpose, is ensured thanks to fuel, n-dodecane for the present study. The endothermic fuel pyrolysis, starting above 800 K, could generate an unwanted coke formation. Experimental tests up to 1125 K and between 1 MPa and 6 MPa have been performed on the hydrocarbon fuel pyrolysis to evaluate the coking activity...

With the retirement of the space shuttle near and rising fuel prices driving a demand for more efficient travel, alternative engine technology is being heavily researched. The scramjet, or supersonic combustion ramjet, has proven to be a promising development in reusable hypersonic transportation. Flight testing these engines, however, is very expensive and no scramjet flight has yet been recov...

An aircraft/engine integrated optimal control method is proposed for turbine-based combined cycle (TBCC) engines based on the Gauss pseudospectral method. The flight trajectory and TBCC law are obtained a TBCC-powered aircraft, “thrust trap” that occurs during turbo-ramjet mode transition further analyzed suppressed. Results show aircraft goes through phase using “climb-dive” trajectory, which ...

This paper reports the results of the second phase of a research project to characterize and optimize the design of an advanced launch vehicle for human access to low earth orbit. The vehicle makes use of rocket-based combined-cycle (RBCC) propulsion — a concept combining operating modes of an ejector, ramjet, scramjet, and rocket in a single engine. This research builds on previous work focuse...

Water ramjet is the most ideal power propulsion device for high-speed underwater weapons. However, failure to start it at low-speed makes hard engine be widely used. In order solve problem of starting water low-speed, a configuration scheme pressurized intake system micro-turbine driving micro-mixed-flow pump proposed. The design method and perfected. And simulation model turbine mixed-flow est...

For supersonic cruising, combined power plants can be used, in which a gas turbine engine reaches the cruising mode, and ramjet is used for cruising. Supersonic transoceanic flights are characterized by long segment, decisive terms of required fuel mass. Therefore, selection operation parameters an important task. As rule, when selecting range parameter depends on flight modes. To take into acc...