Results 261 to 270 of about 7,261 (311)

Nonlinear control experiments on an axial flow compressor

Proceedings of the 39th IEEE Conference on Decision and Control (Cat. No.00CH37187), 2002
A nonlinear control law is designed for a low order model of an axial flow compressor with a ring of bleed valves after the last compressor stage. The controller is implemented on a low speed, three stage experimental compressor. The region of attraction guaranteed by the control law is experimentally determined and is larger than that of the ...
Daniel Fontaine, Shengfang Liao, James Paduano, Petar V. Kokotovic   +3 more
openaire   +1 more source

Axial Compressor Stator Aerodynamics

Journal of Engineering for Gas Turbines and Power, 1985
Axisymmetric, through-flow calculations, currently the “backbone” of most multistage turbomachinery design systems, are being pushed to their limit. This is due to the difference between the complex, three-dimensional flows that actually occur in turbomachinery and the two-dimensional flow assumed in this type of analysis.
H. D. Joslyn, R. P. Dring
openaire   +1 more source

Axial Compressors and Turbines

2012
With the definition of the work coefficient in (6.4a) and (6.4b), we can now write from (4.22a) to (4.22d) the nondimensional azimuthal velocity component expressions as follows: $$ \frac{{{{c}_{\rm{u1}}}}}{u} = \left( {1 - \hat{r}} \right) - \frac{\Psi}{4} $$ $$ \frac{{{{c}_{\rm{u2}}}}}{u} = \left( {1 - \hat{r}} \right) + \frac{\Psi}{4} $$
openaire   +1 more source

Investigations of Axial-Flow Compressors

Journal of Fluids Engineering, 1951
Abstract An approximate theory of the general perfect fluid flow in axial turbomachines is presented. The validity of the simplifying assumptions of the theory is justified by comparison with flow patterns measured in a large, low-speed, axial-flow compressor.
J. T. Bowen, R. H. Sabersky, W. D. Rannie   +2 more
openaire   +1 more source

Centrifugal and Axial Compressors

2016
This chapter and Chap. 10 treat the rotating modules of both aero engines and gas turbines. These modules are compressible turboachinery (or turbomachines). Let us first introduce a definition for turbomachines. The word (turbo) or (turbines) is of Latin origin, meaning “that which spins or whirls around.” Though compressible turbomachines may be fans,
openaire   +1 more source

Stall control for axial compressors *

IFAC Proceedings Volumes, 1999
Abstract Rotating stall is a primary constraint for the performance of flow compressors. This paper establishes a necessary and sufficient condition for a feedback controller to locally stabilize the critical equilibrium of the uniform flow at the inception of rotating stall.
Calin Belta, Guoxiang Gu, Andrew Sparks, Siva Banda   +3 more
openaire   +1 more source

Axial Flow Compressors

1979
The only additional material here over that in chapter 4 is that it is convenient in the velocity diagrams to specify angles δ and γ for trigonometric purposes and polytropic stage efficiency is of importance since axial compressors, which are usually multistage machines are mostly designed on the basis of one stage with an assumed constant stage ...
openaire   +1 more source

AXIAL PISTON COMPRESSOR

2001
The invention relates to an axial piston compressor for a refrigerant, in particular, for a vehicle air conditioner, comprising a body (12), in whose inner volume at least one bearing (22, 24, 26, 48, 56, 58, 60, 64) is arranged, an output line (34), for the compressed refrigerant and a lubricant, present in the inner chamber of the body (12), whereby ...
ZEXEL VALEO COMPRESSOR EUROPE, SCHWARZKOPF OTFRIED, HESSE ULLRICH   +2 more
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Rotating stall in axial compressors

Zeitschrift für angewandte Mathematik und Physik ZAMP, 1955
The phenomenon known as ‘rotating stall’ is described. Basically, it involves a nonuniform pattern of flow, steadily rotating relative to both the fixed and the rotating blades of axial-flow compressors. Attempts to analyze the phenomenon by means of small-perturbation theories are reviewed.
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Centrifugal and axial compressors

Chemical and Petroleum Engineering, 1971
K. P. Seleznev, V. B. Shnepp
openaire   +1 more source