Results 111 to 120 of about 55,977 (241)
Time-dependent transonic flow solutions for axial turbomachinery [PDF]
Three-dimensional unsteady transonic flow through an axial turbomachine stage is described in terms of a pair of two-dimensional formulations pertaining to orthogonal surfaces, namely, a blade-to-blade surface and a hub-to-casing surface.
Alzner, E. +4 more
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Journal of Applied Fluid Mechanics, 2017 The present research investigates the effect of the location and the width of single shallow circumferential groove casing treatment on the flow field and the stability improvement of NASA Rotor 37 utilizing the help of computational fluid dynamics.
Mohsen Agha Seyed Mirzabozorg +2 more
doaj +2 more sources
A practical approach to helicopter internal noise prediction [PDF]
A practical and well correlated procedure for predicting helicopter internal noise is presented. It accounts for the propagation of noise along multiple paths on an octave by octave basis.
Defelice, J. J., Levine, L. S.
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Compressor blade setting angle accuracy study, volume 1 [PDF]
The aerodynamic test of a small, single stage, highly loaded, axial flow transonic compressor is covered. The stage was modified by fabricating a 24 blade rotor with mis-set blades in a repeating pattern - two degrees closed from nominal, two degrees ...
Holman, F. F., Kidwell, J. R.
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Optimisation of tennis string production from bovine intestine : a thesis presented in partial fulfilment of the requirements for the degree of Master in Technology at Massey University, Palmerston North, New Zealand [PDF]
, 1999 The collagen and elastin content of the beef thread samples ranged from between 47-70% and 1.2-2.5% respectively. Amino acid analysis showed that the collagen present was probably collagen Type I while the non-collagenous proteins predominantly were ...
Komolwattanachai, Kanda
core
Transonic compressor technology advancements [PDF]
The highlights of the NASA program on transonic compressors are presented. Effects of blade shape and throat area on losses and flow range are discussed. Some effects of casing treatment on stall margin are presented.
Benser, W. A.
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Research and Field Test of Sand and Rock Influx Well Control Technology
Shiyou jixieTo address the challenges such as incomplete sand flushing， poor sand consolidation and blockage failure during casing damaged sand and rock influx well control process， a set of comprehensive treatment technical scheme was proposed， including ...
Dong Lei +6 more
doaj
Effect of slotted casing treatment on performance of a multistage compressor [PDF]
A J85-13 engine was equipped with a compressor case that allowed changes to the case wall over the rotor tips of six of its eight stages. The engine was tested with four inlet configurations: uniform inlet flow, 180 degree circumferential distortion, hub
Moss, J. E., Jr.
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Structure optimization design for supporting ring of casing head hanger in extra deep oil wells. [PDF]
Sci RepFeng S +6 more
europepmc +1 more source