GE Aerospace and Lockheed Martin have completed testing a series of engine tests to demonstrate the viability of a liquid-fueled, rotating detonation ramjet for use in hypersonic missiles. A “ramjet” is a type of jet engine that draws in air, using only the forward motion of the aircraft to compress it for combustion.
The ramjet being tested incorporates GE Aerospace’s rotating detonation combustion system and a Lockheed Martin’s tactical inlet that promotes high-speed airflow to the combustor.
This system generates high thrust for super- and hypersonic speeds, to engage high-value or time-sensitive targets, with a smaller and lighter engine that boosts range.
“GE Aerospace’s hypersonic capabilities continue to advance at a rapid pace, and this collaboration with Lockheed Martin is another step forward in our journey,” stated Mark Rettig, GE Aerospace vice president and general manager of Edison Works Advanced Programs. “The testing on the rotating detonation ramjet and inlet exceeded expectations, and we are excited about this collaboration to continue maturing our advanced air-breathing hypersonic propulsion technologies.”
The testing, which will continue toward maturation, have been the first project undertaken by the two companies under their joint technology-development arrangement. Based on the test results, the developers expect the fuel-efficient rotating detonation ramjet to fly missiles further and faster, including at hypersonic speeds.
Hypersonic weapons are an area of significant focus for U.S. defense planners and developers. Hypersonic flight - which is five times the speed of sound, or higher - is considered to be a U.S. defense priority, but the developers still must overcome significant physical limits to successful designs, including very high-temperatures and air pressures.
"Following two years of internal investment, this demonstration is a testament to the power of collaboration, innovation and joint commitment to get affordable capability into the hands of warfighters at the speed of relevance,” according to Randy Crites, vice president and general manager at Lockheed Martin Advanced Programs.
