UK advanced propulsion specialist Reaction Engines, which is investigating high-Mach and hypersonic concepts, has demonstrated the viability of a key element, with the integration of its pre-cooler technology with current jet-engine architecture.
Reaction Engines says the “innovative” pre-cooler– which reduces inlet air temperature to increase efficiency and operating speed – has been coupled with a Rolls-Royce engine to simulate a propulsion system for an unpiloted re-usable high-Mach air vehicle.
Its test programme initially reached sustained operating conditions for M2.3 and has since operated at pressures and temperatures for M3.5 – comparable with the speed reached by the Lockheed SR-71 reconnaissance aircraft.
The testing took place at a site in the UK.
“This significant milestone is a testament to our relentless efforts to develop novel, innovative, reusable and affordable propulsion systems for hypersonic air vehicles at pace,” says chief executive Mark Thomas.
He says the capability is adaptable to “multiple applications and mission profiles”.
Reaction Engines disclosed two years ago that it was collaborating with Rolls-Royce, the Royal Air Force and UK defence interests on a joint programme – designated HVX – to pursue hypersonic air vehicle technologies.
This effort aims to take advantage of air-breathing propulsion and new thermal-management systems and will include a full-scale ground-based experimental engine test campaign.
Reaction Engines is also testing high-Mach intake designs for hypersonic flight. “Sub-scale aerodynamic windtunnel testing is already being undertaken to assess intake performance over a range of supersonic conditions,” it says.
