Non-Steady Three-Dimensional Flow Field Analysis in Supersonic Flow Induction

Alhussan, Khaled; Garris, Charles A.

doi:10.1115/fedsm2002-31088

Cited by 7 publications

(6 citation statements)

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“…The conditions of the flow are given by the oblique shock wave relation [1][2][3][4][5][6][7][8][9][10][11][12][13]. The flow in region 2 is parallel to the solid surface of the top wedge [4][5][6][7][8][9][12][13][14]. See figure 8 for the numbering system.…”

Section: Resultsmentioning

confidence: 99%

“…It should be possible to model the characteristic of the flow, the interaction of the shock waves, and expansion fans over double step and opposed wedges using the CFD analysis [14][15][16][17][18][19][20][21][22][23][24]. A numerical analysis must start with breaking the computational domain into discrete sub-domains, which is the grid generation process.…”

Section: Numerical Analysismentioning

confidence: 99%

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Numerical and theoretical analysis of shock waves interaction and reflection

Alhussan¹

2007

WIT Transactions on the Built Environment, Vol 92

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This paper will show numerical and theoretical analysis of shock waves interaction and reflection. In this paper some characteristics of non-steady, compressible flow are explored, including compression and expansion waves, interaction and reflection of waves. The work to be presented herein is a Computational Fluid Dynamics investigation of the complex fluid phenomena that occur inside a three-dimensional region, specifically with regard to the structure of the oblique shock waves, the reflected shock waves and the interactions of the shock waves. The flow is so complex that there exist oblique shock waves, expansion fans, slip surfaces, and shock wave interactions and reflections. The flow is non-steady, viscous, compressible, and high-speed supersonic. This paper will show a relationship between the Mach numbers and the angles of the reflected shock waves, over a double step and opposed wedges. The aim of this paper is to develop an understanding of the shock waves' interaction and reflection in a confined space and to develop a relationship between the Mach number, the geometry of the channel and the strength of the reflected shock waves. In this paper a global comparison is made between the numerical method and the classical method.

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Section: Resultsmentioning

confidence: 99%

Section: Numerical Analysismentioning

confidence: 99%

Numerical and theoretical analysis of shock waves interaction and reflection

Alhussan¹

2007

WIT Transactions on the Built Environment, Vol 92

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“…Around the same period Garris and his team [26][27][28][29][30] proposed the concept of the pressure exchange ejector. It is a dynamic component including a free-spinning rotor mounted on a fixed spindle in the primary side of the fluid flow ( Figure 6b) and allowing for this stream to expand more efficiently than it would in a static ejector version, as well as enhancing stream mixing.…”

Section: Ejector Geometrymentioning

confidence: 99%

“…A compromise is generally sought in terms the order of discretization and grid refinement [242]. Approaches such as grid adaptation which refine grids by zones adjusts the mesh only in the zones of important gradients, for example close to walls (Figure 21 and 22) or in zones of shear layer [28,88,92,165,238] or automatic adjustment dictated by specific criteria have been used [94,137,210,219,224].…”

Section: Computation and Discretization Schemesmentioning

confidence: 99%

Current Advances in Ejector Modeling, Experimentation and Applications for Refrigeration and Heat Pumps. Part 1: Single-Phase Ejectors

et al. 2019

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Ejectors used in refrigeration systems as entrainment and compression components or expanders, alone or in combination with other equipment devices, have gained renewed interest from the scientific community as a means of low temperature heat recovery and more efficient energy use. This paper summarizes the main findings and trends, in the area of heat-driven ejectors and ejector-based machines, using low boiling point working fluids, which were reported in the literature for a number of promising applications. An overall view of such systems is provided by discussing the ejector physics principles, as well as a review of the main developments in ejectors over the last few years. Recent achievements on thermally activated ejectors for single-phase compressible fluids are the main focus in this part of the review. Aspects related to their design, operation, theoretical and experimental approaches employed, analysis of the complex interacting phenomena taking place within the device, and performance are highlighted. Conventional and improved ejector refrigeration cycles are discussed. Some cycles of interest employing ejectors alone or boosted combinations are presented and their potential applications are indicated.

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“…The advection discretization scheme selected is the Modified Linear Profile Skew scheme with the Physical Correction. The convergence criterion is 10E-04 and the solver is left to run until a converged solution is found [15][16][17][18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Computational Analysis of High Speed Flow Over a Double-Wedge for Air as Working Fluid

Alhussan

2005

Volume 2: Fora

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Abstract:-The work to be presented herein is a Computational Fluid Dynamics analysis of flow over a 20-degree half angle cone for a compressible air, with Mach number of 3.0. The problem to be solved involves formation of shock waves so that the general characteristics of supersonic flow are explored through this problem. Shock waves and slip surfaces are discontinuities in fluid mechanics problems. It is essential to evaluate the ability of numerical technique that can solve problems in which shocks and contact surfaces occur. In particular it is necessary to understand the details of developing a mesh that will allow resolution of these discontinuities.Results including contour plots of pressure, temperature, density and Mach number will show that CFD is capable of predicting accurate results and is also able to capture the discontinuities in the flow, e.g., the oblique shock waves. The global comparison between the numerical and the analytical values show a good agreement.

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Non-Steady Three-Dimensional Flow Field Analysis in Supersonic Flow Induction

Cited by 7 publications

References 0 publications

Numerical and theoretical analysis of shock waves interaction and reflection

Numerical and theoretical analysis of shock waves interaction and reflection

Current Advances in Ejector Modeling, Experimentation and Applications for Refrigeration and Heat Pumps. Part 1: Single-Phase Ejectors

Computational Analysis of High Speed Flow Over a Double-Wedge for Air as Working Fluid

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