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D. G.-N Tse has written:
'Velocity and pressure characteristics of a model SSME high pressure fuel turbopump' -- subject(s): Fluid dynamics, Turbine pumps
1 answer
T. F. Zoladz has written:
'Bearing defect signature analysis using advanced nonlinear signal analysis in a controlled environment' -- subject(s): Nonlinearity, Acoustic emission, Bearings, Turbomachinery, Accelerometers, Error analysis, Signature analysis, Failure analysis, Signal analysis
'High-frequency data observations from space shuttle main engine low pressure fuel turbopump discharge duct flex joint tripod failure investigation' -- subject(s): Space shuttles
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Daniel E. Paxson has written:
'A comparison between numerically modelled and experimentally measured loss mechanisms in wave rotors' -- subject(s): Gas-turbines, Rotors
'A numerical model for dynamic wave rotor analysis' -- subject(s): Computational fluid dynamics, Gas turbine engines, Gas generators, Rotors, Mathematical models, Rotor aerodynamics
'A model for the space shuttle main engine high pressure oxidizer turbopump shaft seal system' -- subject(s): Space shuttles
'Wave augmented diffusers for centrifugal compressors' -- subject(s): Computational fluid dynamics, Centrifugal force, Compression waves, Elastic waves, Centrifugal compressors
1 answer
Daniel J. Dorney has written:
'Unsteady blade row interaction in a transonic turbine' -- subject(s): Engine tests, Supersonic turbines, Jet engines, Unsteady flow, Three dimensional flow, Turbomachinery
'Rapid prediction of unsteady three-dimensional viscous flows in turbopump geometries' -- subject(s): Viscous flow, Computational fluid dynamics, Unsteady flow, Turbine pumps, Three dimensional flow, Parallel processing (Computers), Navier-Stokes equation
'Reynolds-averaged Navier-Stokes studies of low Reynolds number effects on the losses in a low pressure turbine' -- subject(s): Blade-vortex interaction, Navier-Stokes equation, Propulsive efficiency, Reynolds number, Rotor stator interactions, Turbine blades, Turbines, Unsteady aerodynamics, Unsteady flow, Wakes
1 answer
J. B. Min has written:
'Effect of flange bolt preload on space shuttle main engine high pressure oxidizer turbopump housing analysis' -- subject(s): Load distribution (Forces), Bolts, Stress distribution, Housings, Stress analysis, Prestressing, Bending fatigue, Flanges, Structural design
'Adaptive finite element methods for continuum damage modeling' -- subject(s): High temperature, Damage, Life (Durability), Viscoplasticity, Grid generation (Mathematics), Finite element method, Predictor-corrector methods, Continuum modeling
'A study on strength evaluations of EDNi/EDCu/NARloy-Z bonded joints' -- subject(s): Combustion chambers, Copper alloys, High strength alloys, Stress analysis, Finite element method, Space shuttle main engine, Bonded joints, Structural design, Ceramics
1 answer
Henry Lee has written:
'The acid rain debate' -- subject(s): Acid rain, Coal mines and mining, Environmental aspects of Acid rain, Environmental aspects of Coal mines and mining
'Epoxy Resins (Advances in Chemistry Ser : No 92)'
'Natural gas decontrol'
'Henry Lee's Crime Scene handbook'
'Handbook of biomedical plastics'
'New linear polymers'
'Beginning Windows Phone 7 development' -- subject(s): Development, Mobile computing, Windows phone (Computer file), Programming, Application software
'Rotisserie Baseball Scouting Report'
'Anti-scepticism'
'Cinco Casos Dificiles'
'The tourist's guide of Florida ..' -- subject(s): Guidebooks
'Space shuttle main engine high pressure fuel turbopump turbine blade cracking' -- subject(s): Blades, Embrittlement, Hydrogen, Turbines
'Energy at the state and local level'
'Epoxy resins'
'Nonindigenous species' -- subject(s): Biological invasions, Congresses, Nonindigenous pests
'Memoirs Of The War In The Southern Department Of The United States'
'Shaping National Responses to Climate Change'
'Fantasy Baseball Scouting Report'
'Adhesive dental composite restoratives' -- subject(s): Acrylic resins, Dental materials
'The Campaign of 1781 in the Carolinas'
1 answer
The mission began with a little-known smaller incident: during the second-stage boost, the center (inboard) engine shut down two minutes early. The four outboard engines burned longer to compensate, and the vehicle continued to a successful orbit.[7] The shutdown was determined to be due to dangerous pogo oscillations that threatened to tear the second stage apart. The engine experienced 68gvibrations at 16 hertz, flexing the thrust frame by 3 inches (76 mm). The engine shutdown was triggered by sensed thrust chamber pressure fluctuations. Smaller pogo oscillations had been seen on previous Titan and Saturn flights (notably Apollo 6),[8] but on Apollo 13 they were amplified by an unexpected interaction with turbopump cavitation.[9] Later missions implemented anti-pogo modifications that had been under development. These included addition of a helium gas reservoir to the center engine liquid oxygen line to dampen pressure oscillations, an automatic cutoff as a backup, and simplification of the propellant valves of all five second-stage engines.
En route to the Moon, approximately 200,000 miles (320,000 km) from Earth,Mission Control asked Swigert to turn on the hydrogen and oxygen tank stirring fans, which were designed to destratify the cryogenic contents and increase the accuracy of their quantity readings. Approximately 93 seconds later, just under 56 hours since launch, the astronauts heard a "loud bang", accompanied by fluctuations in electrical power and firing of the attitude control thrusters.[6] The crew initially thought that a meteoroid might have struck the Lunar Module (LM).
In fact, the number 2 oxygen tank, one of two in the Service Module (SM), had exploded.[10]Damaged Teflon insulation on the wires to the stirring fan inside oxygen tank 2 allowed the wires to short-circuit and ignite this insulation. The resulting fire rapidly increased pressure beyond its 1,000 pounds per square inch (6.9 MPa) limit and the tank dome failed, filling the fuel cell bay (Sector 4) with rapidly expanding gaseous oxygen and combustion products. It is also possible some combustion occurred of the Mylar/Kapton thermal insulation material used to line the oxygen shelf compartment in this bay.13-foot Sector 4 outer aluminum skin panel, which as it blew off probably caused minor damage to the nearby high-gain S-band antenna used for translunar communications. Communications and telemetry to Earth were lost for 1.8 seconds, until the system automatically corrected by switching the antenna from narrow-band to wide-band mode.
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