Numerical and experimental investigations on supersonic ejectors

Bartosiewicz, Yann; Aidoun, Zine; Désévaux, Philippe; Mercadier, Yves

doi:10.1016/j.ijheatfluidflow.2004.07.003

Cited by 308 publications

(133 citation statements)

References 19 publications

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“…K-Ȧ SST turbulence model was used in this case. This model is suitable for calculation of flow in supersonic ejectors as it was stated in previous works [5,6,7]. For further information see documentation [9].…”

Section: Methodsmentioning

confidence: 95%

Experimental and numerical investigation of an air to air supersonic ejector for propulsion of a small supersonic wind tunnel

Kracik

Dvořák

2015

EPJ Web of Conferences

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Abstract. The article deals with experimental and numerical investigation of an air to air supersonic ejector with twelve primary nozzles. The ejector is supposed to be used for propulsion of a small experimental supersonic wind tunnel which is situated in laboratories of Technical University of Liberec. A novel arrangement with 12 primary nozzles is used. The nozzles are placed at the periphery of the mixing chamber. The secondary stream enters the ejector through the free centre of the mixing chamber and is sucked into the space between the primary nozzles. Moreover the declination of the primary nozzles towards to ejector axis is 8.2° and the shape of the mixing chamber and diffuser walls is given by normal cubic spline function, which was investigated in previous work. The declination of the primary nozzles is supposed to eliminate reversal flow in the centre of the mixing chamber. Experimental results for different numbers of simultaneously activated primary nozzles are carried out. Experimental results are compared to the numerical simulation made with the help of Ansys Fluent software.

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Section: Methodsmentioning

confidence: 95%

Experimental and numerical investigation of an air to air supersonic ejector for propulsion of a small supersonic wind tunnel

Kracik

Dvořák

2015

EPJ Web of Conferences

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“…E.g. Bartosiewicz et al used this model in work [5], Simak in work [6] and Kolar and Dvorak in work [7].…”

Section: Numerical Modelmentioning

confidence: 99%

Development of air to air ejector for supersonic wind tunnel

Kracik

Dvořák

Kolář

2014

EPJ Web of Conferences

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Abstract. The contribution deals with the development of design of new conception of ejector with twelve primary annular nozzles arranged around the inlet part of the mixing chamber. The ejector is proposed to be used for propulsion of supersonic experimental wind tunnel with variable test section, which is now in development. The ejector is considered to be placed on outlet of this wind tunnel. The original design of the ejector has been modified to ensure its manufacturability. Software Ansys Fluent 14.0 was used for numerical verification of earlier work. The new design and dissimilarities of numerical results are presented in this work.

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“…The k − model uses the Sarkar formulation , which is applied over the whole computational domain, while the k − ω − sst uses the Wilcox formulation depending on the local flow conditions; both formulation and details can be found in [3,4]. This validation was done for the whole range of ejector operations (on-design, off-design) and for different driving pressures: P 0 1 = 3bar, P 0 1 = 4bar, P 0 1 = 5bar and P 0 1 = 6bar.…”

Section: Cfd Model Validationmentioning

confidence: 99%

“…Judging from recent studies [3][4][5][6][7][8][9], computational fluid dynamics becomes a usual tool to investigate and predict ejectors global operation, understand the complex local flow physics and its link with the overall performances, in order to perform better design of this device or the cycle. However, in a previous paper [1], authors pointed out some shortcomings usually done by using the CFD approach.…”

Section: Introductionmentioning

confidence: 99%