Results 261 to 270 of about 42,563 (310)
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Space Shuttle main engine nozzle-steerhorn dynamics
22nd Structures, Structural Dynamics and Materials Conference, 1981On two occasions during the Space Shuttle main engine development, the LH2 feedline (called the steerhorn, because of its shape) failed during the cutoff transient. A dynamic test was undertaken, and an analytical model was developed and correlated to the dynamic test.
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Journal of Engineering for Power, 1967
This paper considers the effect of nozzle spacing on the pressure stresses at cylindrical pressure vessel shell and nozzle junctures. This consideration is based on a photoelastic test conducted to determine if the stress indices of Section III of the ASME Boiler and Pressure Vessel Code may be used in analysis of reactor vessel designs containing ...
R. M. Stone, S. Hochschild
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This paper considers the effect of nozzle spacing on the pressure stresses at cylindrical pressure vessel shell and nozzle junctures. This consideration is based on a photoelastic test conducted to determine if the stress indices of Section III of the ASME Boiler and Pressure Vessel Code may be used in analysis of reactor vessel designs containing ...
R. M. Stone, S. Hochschild
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Modeling the influence of anode–cathode spacing in a pulsed discharge nozzle
Spectrochimica Acta Part B: Atomic Spectroscopy, 2005Abstract The pulsed discharge nozzle (PDN) is a spectrochemical source that is designed to produce and cool molecular ions in an astrophysically relevant environment in the laboratory with limited fragmentation. In order to gain a better understanding of the PDN and to optimize the yield of molecular ions and radicals in the PDN source, a parameter ...
Broks, B.H.P. +6 more
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Space Shuttle Main Engine nozzle thermal protection system
20th Thermophysics Conference, 1985Two of the three Space Shuttle Main Engine (SSME) nozzles are exposed to significant reentry aeroheating loads. To ensure reusability of the Nozzle Assembly, the nozzle primary structure must not exceed specific temperature limits. Due to the thermal, pressure, and dynamic flexing of the nozzle during a mission cycle, an appropriate insulating system ...
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Space Shuttle solid rocket nozzle Joint 2 gas path study
35th Joint Propulsion Conference and Exhibit, 1999Each Space Shuttle solid rocket nozzle contains five joints. By design, each nozzle joint utilizes room-temperature vulcanized (RTV) rubber as a thermal barrier to protect the nozzle metal parts and O-rings from heat degradation due to motor combustion gas. Typically, combustion gas does not penetrate through the RTV in nozzle Joints.
R. Lui, R. Hyer
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Flow characteristics of the diffuser/nozzle micropump—A state space approach
Flow Measurement and Instrumentation, 2012Abstract This paper presents a new approach to predict the internal state of piezo driven (consisting of diaphragm and piezoelectric disc) diffuser/nozzle micropump at any instant of time. The dynamic performance is evaluated considering the damping effect.
S. Chandika +2 more
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The thrust measurement system research for combined nozzle in small space
Transactions of the Institute of Measurement and Control, 2018For measuring the thrust of combined nozzles in satellite thruster with a small space, the test method that the nozzle directly sprays on the load baffle is employed in this paper. The key problem is how to design the positions of 10 load baffles and how to construct the measurement system.
Yonghua Lu +3 more
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Effect of Nozzle Spacing on Nitrogen-Oxide Emissions and Lean Operability
AIAA Journal, 2016Nitrous-oxide emissions and the equivalence ratio resulting in lean extinction of two adjacent gas turbine fuel/air nozzles are measured as the spacing between the two nozzles is varied. Two swirl-stabilized nozzle types are tested: a high-stability pilot design, and a low-emission design with a much lower swirl number. Jet A is used as the fuel.
Brian Dolan +4 more
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First Korea Space Launch Vehicle Kick Motor Movable Nozzle Motion
Journal of Spacecraft and Rockets, 2010In this study, nozzle rotational angle was obtained frommeasuring axial displacements fromdisplacement gauges. Compensation equations for offaxis and slip effects of the displacement gauge were newly developed to obtain the nozzle rotational angle. A thrust vector control stroke test was conducted to provide linear coefficients related to pitch, yaw ...
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Space Shuttle Main Engine nozzle mounted optic for throat plane spectroscopy
27th Joint Propulsion Conference, 1991A program intended to develop a flight-capable nozzle mounted optic for monitoring emissions from metals entrained in the Space Shuttle Main Engine (SSME) flowfield is described. The optic will collect light emitted from metal atoms within the high-temperature, high-pressure SSME chamber and transfer the optical signal to a high-resolution spectrometer
R. BICKFORD, D. DUNCAN, G. MADZSAR
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