uncleflo
Registered since September 28th, 2017
Has a total of 4246 bookmarks.
Showing top Tags within 5 bookmarks
howto information development guide reference administration design website software solution service product online business uk tool company linux code server system application web list video marine create data experience description tutorial explanation technology build blog article learn world project boat download windows security lookup free performance javascript technical network control beautiful support london tools course file research purchase library programming image youtube example php construction html opensource quality install community computer profile feature power browser music platform mobile work user process database share manage hardware professional buy industry internet dance advice installation developer 3d search material access customer travel camera test standard review documentation css money engineering develop webdesign engine device photography digital api speed source management program phone discussion question event client story simple water marketing app content yacht setup package fast idea interface account communication cheap compare script study market live easy google resource operation startup monitor training
Tag selected: mach.
Looking up mach tag. Showing 5 results. Clear
On the Comparison of the Long Penetration Mode (LPM) Supersonic Counterflowing Jet
Saved by uncleflo on December 7th, 2016.
Classic tonal screech noise created by under-expanded supersonic jets; Long Penetration Mode (LPM) supersonic phenomenon -Under-expanded counter-flowing jet in supersonic free stream -Demonstrated in several wind tunnel tests -Modeled in several computational fluid dynamics (CFD) simulations; Discussion of LPM acoustics feedback and fluid interactions -Analogous to the aero-acoustics interactions seen in screech jets; Lessons Learned: Applying certain methodologies to LPM -Developed and successfully demonstrated in the study of screech jets -Discussion of mechanically induced excitation in fluid oscillators in general; Conclusions -Large body of work done on jet screech, other aero-acoustic phenomenacan have direct application to the study and applications of LPM cold flow jets. For the Oral/Visual Presentation in which this video was presented, please see the following link in the NASA Technical Reports Server (NTRS, http://ntrs.nasa.gov): http://hdl.handle.net/2060/20150016244
shockwave shock jet test tunnel supersonic wind sonic aerodynamics mach sound speed fast study research simulation real discussion acoustic feedback fluid interaction nasa
Nozzle Design
Saved by uncleflo on September 2nd, 2014.
A rocket engine uses a nozzle to accelerate hot exhaust to produce thrust as described by Newton's third law of motion. The amount of thrust produced by the engine depends on the mass flow rate through the engine, the exit velocity of the flow, and the pressure at the exit of the engine. The value of these three flow variables are all determined by the rocket nozzle design.
rocket science nasa aerospace physics math thrust nozzle design exhaust theory explanation description flow supersonic sonic velocity exit temperature fuel mach system number choke equations research information
The SR-71 Pratt & Whitney JT11D-20B J58 Engine
Saved by uncleflo on June 20th, 2014.
The SR-71 Blackbird is powered by two Pratt & Whitney J-58 turbo-ramjets, each developing 32,500 pounds of thrust with afterburning. The critical problems concerning supersonic flight with air breathing engines are concentrated in the air inlet area. The circular air intakes of the SR-71 contain a center body tipped with a conical spike. The spike is movable, forward for takeoff and climb to 30,000 feet after which, as speed builds up, it moves rearward, controlling the amount of air entering the engine. As it does so, Air Inlet Bypass Doors in the side of the nacelle close to establish the correct flow of air through the engine, holding the supersonic shock wave in it's critical position within the inlet. The engine itself operates at subsonic speed.
pratt whitney engine sr-71 black bird blackbird plane military usa defence spy speed description information supersonic guide inlet critical mach ramjet thrust afterburn problem flight concentration spike takeoff climb flow nacelle
SR-71 Blackbird follow-up: A new TERRIFYING Mach 6 spy-drone bomber • The Register
Saved by uncleflo on June 3rd, 2014.
Pics The famous SR-71 Blackbird was put out to pasture over a decade ago – but the legendary Skunk Works aviation wizards that built it have been showing off a replacement that can travel twice as fast and it could be in the skies within a decade. The SR-72 will be unmanned, saving a lot of the weight needed to keep the two fleshy pilots of its predecessor alive and functional, and will be able to cruise at high speeds for aerial reconnaissance. It is also being designed to have offensive capabilities that would make it the ultimate in fast bombers.
skunkworks skunk project research engineering blackbird airplane space plane hypersonic mach scramjet defence drone speed aviation boost rocket advanced design offense fly earth turbo twin engine technology fast
DARPA: You didn't think we could make a Mach 6 spaceplane, so let us have this MACH TEN job • The Register
Saved by uncleflo on June 3rd, 2014.
A Mach 10 plane capable of rapid turnaround between missions will need to be pretty tough to resist the heat generated as it bores through the atmosphere at hypersonic speed. In DARPA's view this will be pretty much as bad as the frying the space shuttle used to suffer and the X-37B still does. The XS-1 will need "low-maintenance thermal protection systems that provide protection from temperatures and heating rates ranging from orbital vacuum to atmospheric re-entry".
hypersonic atmosphere darpa mach space plane job thermal protection system heat experiment test project rocket mission fast
No further bookmarks found.