Results 211 to 220 of about 1,878 (261)
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Modeling for control of rotating stall
Automatica, 1994Abstract An analytical model for control of rotating stall has been obtained from the basic fluid equations describing the process at inception. The model describes rotating stall as a traveling wave packet, sensed—in spatial components—via the Fourier decomposition of measurements obtained from a circumferential array of evenly distributed sensors ...
James D. Paduano +4 more
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A theory for rotating stall in contra-rotating fans
Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, 2020This paper reports on a theory of rotating stall in contra-rotating fans and compressors. The theory is developed from Moore’s theory. A second-order hysteresis is used in the current study for the pressure rise of the counter-rotating rows. This enables the model to predict the transient behavior of the stall cell.
Hossein Khaleghi +2 more
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High performance computing of compressor rotating stall and stall control
Integrated Computer-Aided Engineering, 2009The performance of gas turbine engines is limited by compressor stall. Stall control technologies developed recently have demonstrated the effectiveness of steady tip injection to increase the stable operating range of high-speed axial and centrifugal compressors.
Jen-Ping Chen +4 more
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STABILITY ANALYSIS AND CONTROL OF ROTATING STALL
IFAC Proceedings Volumes, 1992Issues of stability and control of rotating stall in axial flow compressor dynamics are considered. A stationary bifurcation analysis of compression system near the stall point is obtained, which shows that the stability of system can be predicted from either of two mathematical models of system, regarding the choice of state variables.
Der-Cherng Liaw, E.H. Abed
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World Pumps, 2020
Rotating stall is a flow phenomenon which can induce high vibration and damage to a system. In this case, the problems were addressed through an engineering design review and modifications, preventing further issues and restoring efficiency.
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Rotating stall is a flow phenomenon which can induce high vibration and damage to a system. In this case, the problems were addressed through an engineering design review and modifications, preventing further issues and restoring efficiency.
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Rotating Stall in Axial Flow Compressors
Journal of the Aeronautical Sciences, 1957The classical theories of linearized aerodynamics yields a complete description of the flow field due to the rotating stall in a two-dimensional cascade of airfoils, when the extension of the stalled region is small. The corresponding physical scheme can be used for larger stalled regions, without the limitations of the linearizing assumptions, if no ...
Fabri, Jean, Siestrunck, Raymond
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Criteria for Spike Initiated Rotating Stall
Volume 6: Turbo Expo 2005, Parts A and B, 2005A computational study to define the phenomena that lead to the onset of short length-scale (spike) rotating stall disturbances has been carried out. Unsteady simulations show there are two conditions necessary for the formation of spike disturbances, both of which are linked to the tip clearance flow. One is that the interface between the tip clearance
Huu Duc Vo +2 more
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The Number and Speed of Stall Cells During Rotating Stall
Volume 6: Turbo Expo 2003, Parts A and B, 2003The number of stall cells and their rotational speed are distinctive features of the rotating stall phenomenon and play an important role in the prediction and analysis of the pressure fields during rotating stall. Various aspects of numbers and speed of stall cells are analyzed using an original interpretation method based on the pressure distribution
Y. Levy, J. Pismenny
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Rotating stall control via bifurcation stabilization
ISCAS '98. Proceedings of the 1998 IEEE International Symposium on Circuits and Systems (Cat. No.98CH36187), 1998zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Xiang Chen 0011 +3 more
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Simulation of the Onset of Rotating Stall
Fluids Engineering, 2001Abstract This paper presents the results of a series of numerical simulations exploring the stability of fluid flow in vaneless diffusers of centrifugal compressors. Three-dimensional, time-dependent, Reynolds-averaged Navier-Stokes simulations were performed for a fixed diffuser width ratio.
Christopher J. Freitas +1 more
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