The article deals with numerical investigation of axisymmetric
subsonic air to air ejector. An analysis of flow and mixing
processes in cylindrical mixing chamber are made. Several modes
with different velocity and ejection ratio are presented. The mixing
processes are described and differences between flow in the initial
region of mixing and the main region of mixing are described. The
lengths of both regions are evaluated. Transition point and point
where the mixing processes are finished are identified. It was found
that the length of the initial region of mixing is strongly dependent on
the velocity ratio, while the length of the main region of mixing is
dependent on velocity ratio only slightly.
<p>[1] D.W. Sun, I.W. Eames, Recent Developments in the Design Theories
and Applications of Ejectors – a review, Journal of the Institute of
Energy, 65-79 (1995)
[2] S.T. Bonnington, A.L. King, Jet Pumps and Ejectors, a State of the Art;
Review and bibliography (2nd edn), BHRA Fluid Eng, Cranfield,
Bedford UK (1976)
[3] J.L. Porter, R.A. Squyers, A Summary/Overview of Ejector Augmentor
Theory and Performance, ATC Report No. R-91100/9CR-47A, Vought
Corpn Advanced Technology Cr, Dallas, Texas (1981)
[4] J.H. Keenan, E.P. Neumann, A Simple Air Ejector, J Applied
Mechanics, Trans ASME 64, A75 - A81 (1942)
[5] J.H. Keenan, E.P. Neumann, F. Lustwerk, An Investigation of Ejector
Design by Analysis and Experiment, Journal of Applied Mechanics,
Trans ASME 72, 299-309 (1950)
[6] V. Dvořák, Optimized Axi-Symmetric Ejector – Experimental and
Numerical Investigation, Experimental Fluid Mechanics 4 (1), 34-43
(2009)
[7] V. Dvořák, Numerical Computation of Efficiency Curve of Ejector,
Conference ANSYS, Prague, 149-156 (2007)
[8] E. Rusly, Lu Aye, W.W.S. Charters, A. Ooi, CFD Analysis of Ejector in
a Combined Ejector Cooling System, International Journal of
Refrigeration 28, 1092-1101 (2005)
[9] Y. Bartosiewicz, Z. Aidoun, P. Desevaux, Y. Mercadier, Numerical and
experimental investigations on supersonic ejectors, International
Journal of Heat and Fluid Flow 26, 56-70 (2005)
[10] J. Šimák, Computation of the Flow and Interaction of Shock Waves in a
2D Supersonic Ejector, Colloquium Fluid Dynamics 2009, Institute of
Thermomechanics AS CR, v.v.i., Prague, Czech Republic, October 21 -
23, 2009.
[11] V. Dvořák, P. Novotný, P. Dančová, D. Jašíková, PIV and CTA
Measurement of Constant Area Mixing in Subsonic Air Ejector,
Experimental Fluid Mechanics 7 (1), 109-114 (2012)
[12] R. A. Tyler, R. G. Williamson, Confined mixing of coaxial flows,
Aeronautical report LR-602, NRC no. 18831 (Division of Mechanical
Engineering, Ottawa, Canada 1980).</p>
<p>[1] D.W. Sun, I.W. Eames, Recent Developments in the Design Theories
and Applications of Ejectors – a review, Journal of the Institute of
Energy, 65-79 (1995)
[2] S.T. Bonnington, A.L. King, Jet Pumps and Ejectors, a State of the Art;
Review and bibliography (2nd edn), BHRA Fluid Eng, Cranfield,
Bedford UK (1976)
[3] J.L. Porter, R.A. Squyers, A Summary/Overview of Ejector Augmentor
Theory and Performance, ATC Report No. R-91100/9CR-47A, Vought
Corpn Advanced Technology Cr, Dallas, Texas (1981)
[4] J.H. Keenan, E.P. Neumann, A Simple Air Ejector, J Applied
Mechanics, Trans ASME 64, A75 - A81 (1942)
[5] J.H. Keenan, E.P. Neumann, F. Lustwerk, An Investigation of Ejector
Design by Analysis and Experiment, Journal of Applied Mechanics,
Trans ASME 72, 299-309 (1950)
[6] V. Dvořák, Optimized Axi-Symmetric Ejector – Experimental and
Numerical Investigation, Experimental Fluid Mechanics 4 (1), 34-43
(2009)
[7] V. Dvořák, Numerical Computation of Efficiency Curve of Ejector,
Conference ANSYS, Prague, 149-156 (2007)
[8] E. Rusly, Lu Aye, W.W.S. Charters, A. Ooi, CFD Analysis of Ejector in
a Combined Ejector Cooling System, International Journal of
Refrigeration 28, 1092-1101 (2005)
[9] Y. Bartosiewicz, Z. Aidoun, P. Desevaux, Y. Mercadier, Numerical and
experimental investigations on supersonic ejectors, International
Journal of Heat and Fluid Flow 26, 56-70 (2005)
[10] J. Šimák, Computation of the Flow and Interaction of Shock Waves in a
2D Supersonic Ejector, Colloquium Fluid Dynamics 2009, Institute of
Thermomechanics AS CR, v.v.i., Prague, Czech Republic, October 21 -
23, 2009.
[11] V. Dvořák, P. Novotný, P. Dančová, D. Jašíková, PIV and CTA
Measurement of Constant Area Mixing in Subsonic Air Ejector,
Experimental Fluid Mechanics 7 (1), 109-114 (2012)
[12] R. A. Tyler, R. G. Williamson, Confined mixing of coaxial flows,
Aeronautical report LR-602, NRC no. 18831 (Division of Mechanical
Engineering, Ottawa, Canada 1980).</p>
@article{"International Journal of Mechanical, Industrial and Aerospace Sciences:55635", author = "Václav Dvořák", title = "Analysis of Flow in Cylindrical Mixing Chamber", abstract = "The article deals with numerical investigation of axisymmetric
subsonic air to air ejector. An analysis of flow and mixing
processes in cylindrical mixing chamber are made. Several modes
with different velocity and ejection ratio are presented. The mixing
processes are described and differences between flow in the initial
region of mixing and the main region of mixing are described. The
lengths of both regions are evaluated. Transition point and point
where the mixing processes are finished are identified. It was found
that the length of the initial region of mixing is strongly dependent on
the velocity ratio, while the length of the main region of mixing is
dependent on velocity ratio only slightly.
", keywords = "Air ejector, mixing chamber, CFD.", volume = "7", number = "7", pages = "1517-8", }
