Results 101 to 110 of about 17,991 (229)

Reduction of acoustic disturbances in the test section of supersonic wind tunnels by laminarizing their nozzle and test section wall boundary layers by means of suction [PDF]

The feasibility of quiet, suction laminarized, high Reynolds number (Re) supersonic wind tunnel nozzles was studied. According to nozzle wall boundary layer development and stability studies, relatively weak area suction can prevent amplified nozzle wall
Pfenninger, W., Syberg, J.
core   +1 more source

Naturally occurring and forced azimuthal modes in a turbulent jet [PDF]

Naturally occurring instability modes in an axisymmetric jet were studied using the modal frequency technique. The evolution of the modal spectrum was obtained for a jet with a Reynolds number based on a diameter of 400,000 for both laminar and turbulent
Raman, Ganesh, Reshotko, Eli, Rice, Edward J.   +2 more
core   +1 more source

Convergent-divergent nozzle flows [PDF]

Uniform two-zone perfect gas expansions in convergent-divergent ...
Kliegel, J. R., Quan, V.
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3D analysis of gas flow behavior and particle acceleration characteristics in cold spray additive manufacturing based on non-axisymmetric numerical models

Journal of Materials Research and Technology
Cold spraying has been recognized as a promising additive manufacturing technology due to its inherent characteristics of solid-state and high deposition rate.
Wenpeng Wan, Wenya Li, Dong Wu, Zhengmao Zhang, Bo Ning   +4 more
doaj   +1 more source

Comparison of prediction methods and studies of relaxation in hypersonic turbulent nozzle-wall boundary layers [PDF]

Turbulent boundary layer measurements on axisymmetric hypersonic nozzle ...
Bushnell, D. M., Feller, W. V., Harvey, W. D., Johnson, C. B.   +3 more
core   +1 more source

Streamwise vorticity generation and mixing enhancement in free jets by delta-tabs [PDF]

The effect of triangular tabs, placed at the nozzle exit, on the evolution of free jets is investigated. The effect, a large distortion of the jet cross section and a resultant increase in mixing downstream, has been inferred before to be due to a pair ...
Zaman, K. B. M. Q.
core   +1 more source

Research of a Novel Non-Axisymmetric Side-Compressed Variable Polarity Plasma Arc and Its Pressure Distribution Characteristics

Metals
In the keyhole variable polarity plasma arc weldng (VPPAW) process at horizontal position, the metal driven by gravity gathered on one side of the molten pool, and the weld formation is difficult, especially for thick workpiece welding.
Hongxing Zhao, Chunli Yang, Chenglei Fan
doaj   +1 more source

Design of optimized three-dimensional thrust nozzle contours [PDF]

Design of optimized three-dimensional thrust nozzle ...
Murthy, S. N. B., Thompson, H. D.
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Solid rocket booster internal flow analysis by highly accurate adaptive computational methods [PDF]

The primary objective of this project was to develop an adaptive finite element flow solver for simulating internal flows in the solid rocket booster. Described here is a unique flow simulator code for analyzing highly complex flow phenomena in the solid
Bass, J. M., Cullen, C., Huang, C. Y., Oden, J. T., Tworzydlo, W., Vadaketh, S.   +5 more
core   +1 more source

Comparison of various turbulence models for ejector nozzle CFD

Авіаційно-космічна техніка та технологія
The subject of this article is the application of various turbulence models to calculations of thrust-augmenting ejector nozzles for jet engines by computational fluid dynamics (CFD).
Ruslan Tsukanov
doaj   +1 more source