Results 251 to 260 of about 7,165 (303)
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Effect of Exit Spacing in a Multiple-Jet Nozzle on Noise Levels at Audible Frequencies
Journal of Occupational and Environmental Hygiene, 2011This work investigated the effect of exit spacing on audible noise levels generated by a multiple-jet nozzle, which replaces the single exit in a common nozzle with multiple smaller exits to reduce the risk of hearing damage. Sound measurements and 1/3-octave band analyses were performed for multiple-jet nozzles with varying exit diameters and exit ...
exaly +3 more sources
43rd AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, 2007
The article presents the development of Thermal Barrier Coating (TBC) systems for nozzles used by Volvo Aero Corporation (VAC) for space engines and span from the Viking thrust chamber to the next generation nozzle extensions after NE2 for the Vulcain 2. The article presents the development work done to introduce TBC onto the Nozzle Extensions.
Lars Ostergren, Jan Wigren
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The article presents the development of Thermal Barrier Coating (TBC) systems for nozzles used by Volvo Aero Corporation (VAC) for space engines and span from the Viking thrust chamber to the next generation nozzle extensions after NE2 for the Vulcain 2. The article presents the development work done to introduce TBC onto the Nozzle Extensions.
Lars Ostergren, Jan Wigren
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Nozzle optimization for space-based vehicles
35th Joint Propulsion Conference and Exhibit, 1999The method of designing the exhaust nozzle contour for optimum thrust by variational methods is restricted to nozzle lengths above a certain minimum. This is referred to as the region of valid computation of the control surface where a shock-free solution is attainable.
G. Rao, J. Beck, T. Booth
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14th Joint Propulsion Conference, 1978
Two Space Shuttle solid propellant rocket motor (SRM) nozzles have been tested, both successfully. This paper summarizes the results of these tests. The SRM nozzle was designed and fabricated at the Wasatch Division of Thiokol Corporation. It is over 13 ft. long, has a 54.43 in. initial throat diameter, and weighs over 11 tons.
A. CANFIELD, E. ANDERSON, G. NICHOLS
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Two Space Shuttle solid propellant rocket motor (SRM) nozzles have been tested, both successfully. This paper summarizes the results of these tests. The SRM nozzle was designed and fabricated at the Wasatch Division of Thiokol Corporation. It is over 13 ft. long, has a 54.43 in. initial throat diameter, and weighs over 11 tons.
A. CANFIELD, E. ANDERSON, G. NICHOLS
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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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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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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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Performance of an aero-space plane propulsion nozzle
20th Fluid Dynamics, Plasma Dynamics and Lasers Conference, 1989An inviscid and viscous analysis is provided for an exposed half nozzle that is used with a scramjet for thrust generation. The analysis is based on the inviscid theory of a two-dimensional, minimum length nozzle with a curved inlet surface, where the flow may be sonic or supersonic. Inlet conditions are prescribed and the gas is assumed to be perfect.
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Effect of Nozzle Spacing on NOx Emissions and Lean Operability
54th AIAA Aerospace Sciences Meeting, 2016NOX 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 low-emission design with much lower swirl number. Jet A is used as the fuel.
Brian J. Dolan +3 more
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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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