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Space Forum / Space Flight / August 2003Pulse detonation?
http://www.popsci.com/popsci/aviation/article/0,12543,473272-1,00.html Is pulse detonation applicable for rocket technology? Considering "loud" isn't really that big an issue for a rocket. And considering rockets carry their own fuel and oxidizer, it would seem that pulse detonation technology would be something that would be easier to use and develop instead of trying to make into an advance jet engine first. Arthur Hansen P.S. Thanks, Slashdot.org for noticing this neat article! > http://www.popsci.com/popsci/aviation/article/0,12543,473272-1,00.html > [quoted text clipped - 8 lines] > > P.S. Thanks, Slashdot.org for noticing this neat article! One goes to the trouble of trying to develop pulse detonation engines precisely *because* they're airbreathers. If your application doesn't require airbreathing over a wide Mach nuber range, you use rockets. > http://www.popsci.com/popsci/aviation/article/0,12543,473272-1,00.html > [quoted text clipped - 8 lines] > > P.S. Thanks, Slashdot.org for noticing this neat article! It has been proposed. But the big gain with PDE is not that big a gain when compared to a rockets. The driving force on PDE research is for air-breathers were fuel economy makes you lots of money. Rocket engines however are in fact very close the theoretical thermodynamic limits of efficiency. The gains, in any, are outweighed by the unsteady nature of PDE. >Is pulse detonation applicable for rocket technology? In principle, yes. It offers very high combustion pressures without needing high-pressure pumps. In practices, maybe someday. The fact that it's been coming "real soon now" for going on fifty years is not encouraging.  SignatureMOST launched 1015 EDT 30 June, separated 1046, | Henry Spencer first ground-station pass 1651, all nominal! | henry@spsystems.net >>Is pulse detonation applicable for rocket technology? > [quoted text clipped - 3 lines] >In practices, maybe someday. The fact that it's been coming "real soon >now" for going on fifty years is not encouraging. Sounds like 1940's German V1 engine. Maybe strap a V1 intake to a ramjet. Use pulse jet for low speeds & lock the shutters open for high speed ramjet operations? ____ Fox2 "When caught between two evils, I generally pick the one I've never tried before." - Mae West >Sounds like 1940's German V1 engine. There are similarities but it's not really that close. The *detonation* part is new, and is a major source of difficulties. Combustion in the V-1's pulsejet was ordinary burning, not detonation. SignatureMOST launched 1015 EDT 30 June, separated 1046, | Henry Spencer first ground-station pass 1651, all nominal! | henry@spsystems.net |
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