Chinese scientists say coal power could slash hypersonic flight costs
- Experimental engine uses low-cost mix of carbon particles and ethylene to trigger shocks at six times the speed of sound
- Researchers expect the technology to achieve at least 20 per cent higher fuel efficiency than modern jet engines
In one ground test, an experimental device using the low-cost mixture produced shocks travelling at more than 2km (1.24 miles) per second, or six times the speed of sound, the researchers said in a paper published in the China Ordnance Society’s peer-reviewed Acta Armamentarii journal’s September 15 edition.
Ethylene is one of the most abundant products from oil refineries, while coal currently contributes more to China’s electricity production than any other energy source.
“Coal powder’s high energy density, safety and low price give it a unique advantage when used as an engine fuel,” said the team, led by professor Weng Chunsheng at Nanjing University of Science and Technology’s national key laboratory of transient physics.
According to information on the university’s website, Weng and his colleagues are developing detonation engine technology for China’s hypersonic programme to achieve smooth, long-range flight at Mach 7.
The United States government has sanctioned the university, based in the eastern coastal province of Jiangsu, for engaging in research activities with military potential.
