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On the Stability of Compressible Swirling Flow
Studies in Applied Mathematics, 1973The linear stability to axisymmetric perturbations of compressible non‐dissipative swirling flow is shown to be insured if a suitably defined “Richardson number” depending on the basic velocity, temperature and density fields everywhere exceeds 1/4. This result combines and generalizes in a natural way some known results for incompressible swirling ...
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Journal of Energy, 1977
Tests in a combustion centrifuge demonstrated that the normal progression from laminar flamespeeds of about 0.3 m/s (in hydrocarbon-air mixtures) to turbulent flamespeeds of up to 6.1 m/s can be advanced to a third stage, where flamespeeds in excess of 19 m/s were measured.
George D. Lewis +2 more
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Tests in a combustion centrifuge demonstrated that the normal progression from laminar flamespeeds of about 0.3 m/s (in hydrocarbon-air mixtures) to turbulent flamespeeds of up to 6.1 m/s can be advanced to a third stage, where flamespeeds in excess of 19 m/s were measured.
George D. Lewis +2 more
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25th AIAA Aerospace Sciences Meeting, 1987
The physics of the flow interaction between swirl and secondary flow was studied in duct bends relevant to the design of advanced aircraft nozzle systems. Both laminar and turbulent subsonic flows were investigated in generic duct bends for different amounts of swirl.
TOMMY TSAI, RALPH LEVY
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The physics of the flow interaction between swirl and secondary flow was studied in duct bends relevant to the design of advanced aircraft nozzle systems. Both laminar and turbulent subsonic flows were investigated in generic duct bends for different amounts of swirl.
TOMMY TSAI, RALPH LEVY
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AIAA Journal, 1969
An approximation that can be used to determine how swirl affects the choking constraint on flow through the throat of a nozzle is obtained. The flow model is consistent with an experimentally observed flow pattern that contains a recirculating internal cell upstream of the throat.
W. S. LEWELLEN +2 more
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An approximation that can be used to determine how swirl affects the choking constraint on flow through the throat of a nozzle is obtained. The flow model is consistent with an experimentally observed flow pattern that contains a recirculating internal cell upstream of the throat.
W. S. LEWELLEN +2 more
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The Stability of Compressible Swirling Flow
International Journal of Nonlinear Sciences and Numerical Simulation, 2000Summary: We investigate analytically the stability of inviscid compressible and variable density swirling flows between two concentric cylinders. Two criteria for necessary and sufficient condition for stability are derived under narrow gap approximation. The criteria are compared with other stability criteria for similar flows. Finally, we investigate
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AIChE Journal, 1961
AbstractThe presence of vortex motion in a vertical cylinder in which water is passed upward can result in three types of velocity profiles: net upward motion at all points in the tube, an ascending outer annulus and a descending central core, and outer annulus and central core ascending and an intermediate annulus descending.All three types of ...
Alfred H. Nissan, V. P. Bresan
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AbstractThe presence of vortex motion in a vertical cylinder in which water is passed upward can result in three types of velocity profiles: net upward motion at all points in the tube, an ascending outer annulus and a descending central core, and outer annulus and central core ascending and an intermediate annulus descending.All three types of ...
Alfred H. Nissan, V. P. Bresan
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2009
The Batchelor vortex is adopted as the mathematical model of swirling flow. The modes of the Batchelor vortex fall into three broad categories: core modes, algebraic modes and continuous modes. The core modes have been extensively documented but the last two modes have received little attention. The energy growth of those modes are studied by employing
Xuerui Mao, Spencer J. Sherwin
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The Batchelor vortex is adopted as the mathematical model of swirling flow. The modes of the Batchelor vortex fall into three broad categories: core modes, algebraic modes and continuous modes. The core modes have been extensively documented but the last two modes have received little attention. The energy growth of those modes are studied by employing
Xuerui Mao, Spencer J. Sherwin
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Symposium (International) on Combustion, 1973
Combustion in high-speed swirling flow is an alternate process to the high-intensity, low-weight combustion chamber for gas turbines. The increase in combustion intensity due to the centrifugal force field, the more-rapid dilution, and the greater stability of the cooling film on the outer wall, are the main advantages of this system. Further, the high
A. Mestre, A. Benoit
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Combustion in high-speed swirling flow is an alternate process to the high-intensity, low-weight combustion chamber for gas turbines. The increase in combustion intensity due to the centrifugal force field, the more-rapid dilution, and the greater stability of the cooling film on the outer wall, are the main advantages of this system. Further, the high
A. Mestre, A. Benoit
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Numerical simulation of compulsive swirling flows field on two-phase swirling flows finishing
International Journal of Computer Applications in Technology, 2007Two-phase swirling flows finishing is put forward mainly for hole surface. By theoretical analysis and experimental research, the characteristics of compulsive swirling flows field will directly affect the finishing quality and efficiency. On the basic premise of defining k-e model on swirling flows field, numerical simulation of velocity vector graph,
S. Q. Yang, W. H. Li, S. C. Yang
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2010
A liquid in a rigid vessel subjected to external forced excitation becomes unstable under certain conditions due to strong nonlinear effects [1–12]. A variety of modes of liquid surface oscillations occur such as rotary sloshing or swirl. Such oscillations exert significant influence on the safety of cylindrical tanks preserving petroleum, tankers ...
Manabu Iguchi, Olusegun J. Ilegbusi
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A liquid in a rigid vessel subjected to external forced excitation becomes unstable under certain conditions due to strong nonlinear effects [1–12]. A variety of modes of liquid surface oscillations occur such as rotary sloshing or swirl. Such oscillations exert significant influence on the safety of cylindrical tanks preserving petroleum, tankers ...
Manabu Iguchi, Olusegun J. Ilegbusi
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