The flow field near the triple point in steady shock reflection

Experimental results show that there exist two flow fields in the hypersonic inlets when the forebody waves interact with the lip boundary, which is similar to the shock reflection ion hysteresis phenomenon. In order to improve the performance of the flow field, counterflow is applied to control the shock reflection configuration in the hypersonic inlets. For better understanding of the internal mechanism, inviscid numerical simulation is conducted. And the results demonstrate that it is feasible to realize the transition between the regular reflection configuration and the Mach reflection ion configuration in the hypersonic inlets. That is because the von Neumann criterion and detached criterion play a dominant role, respectively, in these transitions. In addition, the evolution process of Mach reflection ion in the hypersonic inlets can be divided into three stages: transmission of waves, emergence of Mach stem, and stabilization of flow field.

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Navier–Stokes simulation of slipstream evolution in steady shock reflection

Journal of Visualization ◽

10.1007/s12650-016-0407-1 ◽

2016 ◽

Vol 20 (3) ◽

pp. 515-518

Author(s):

Abhishek Kundu ◽

Sudipta De

Keyword(s):

Shock Reflection ◽

Navier Stokes ◽

Steady Shock

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The influence of Reynolds number on the triple point trajectories at shock reflection off cylindrical surfaces

Journal of Fluid Mechanics ◽

10.1017/jfm.2013.634 ◽

2014 ◽

Vol 740 ◽

pp. 47-60 ◽

Cited By ~ 20

Author(s):

H. Kleine ◽

E. Timofeev ◽

A. Hakkaki-Fard ◽

B. Skews

Keyword(s):

Reynolds Number ◽

Triple Point ◽

Transition Process ◽

Shock Reflection ◽

Time Resolved ◽

Reflection Pattern ◽

Highly Nonlinear ◽

Irregular Reflection ◽

Point Trajectories ◽

Delayed Growth

AbstractIn the unsteady process of shock reflection off convexly curved surfaces, the Reynolds number can have an influence on the development of the irregular reflection pattern. Time-resolved visualizations of the reflection process and high-resolution numerical simulation are used in this investigation to quantify this influence, which manifests itself in a delayed growth of the shock pattern with decreasing Reynolds number. In order to conduct reliable and unambiguous measurements, the present study concentrates on observing the development of the established irregular reflection pattern rather than attempting to determine the transition point directly. It can be seen that the influence of the Reynolds number is highly nonlinear and that changes of two orders of magnitude or more are required to produce a reliably measurable difference in the triple point trajectories, which is considerably more than what has so far been reported in the literature. The results allow one to make inferences regarding the transition process and they help to clarify previously reported discrepancies between predicted and experimentally determined transition angles.

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Investigation of the hysteresis phenomena in steady shock reflection using kinetic and continuum methods

Shock Waves ◽

10.1007/bf02434009 ◽

1996 ◽

Vol 5 (6) ◽

pp. 341-346 ◽

Cited By ~ 21

Author(s):

M. Ivanov ◽

D. Zeitoun ◽

J. Vuillon ◽

S. Gimelshein ◽

G. Markelov

Keyword(s):

Shock Reflection ◽

Steady Shock ◽

Hysteresis Phenomena

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Detailed measurements of the flow field in vaneless and vaned diffusers of centrifugal compressors

Journal de Physique III ◽

10.1051/jp3:1992213 ◽

1992 ◽

Vol 2 (9) ◽

pp. 1787-1804 ◽

Cited By ~ 2

Author(s):

Christian Fradin

Keyword(s):

Flow Field ◽

Centrifugal Compressors

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Numerical Study of the Combined Free-Forced Convection and Mass Transfer Flow Past a Vertical Porous Plate in a Porous Medium with Heat Generation and Thermal Diffusion

Nonlinear Analysis Modelling and Control ◽

10.15388/na.2006.11.4.14737 ◽

2006 ◽

Vol 11 (4) ◽

pp. 331-343 ◽

Cited By ~ 19

Author(s):

M. S. Alam ◽

M. M. Rahman ◽

M. A. Samad

Keyword(s):

Mass Transfer ◽

Flow Field ◽

Differential Equations ◽

Forced Convection ◽

Heat Generation ◽

Numerical Study ◽

Porous Plate ◽

Integration Scheme ◽

Suction Parameter ◽

Transfer Flow

The problem of combined free-forced convection and mass transfer flow over a vertical porous flat plate, in presence of heat generation and thermaldiffusion, is studied numerically. The non-linear partial differential equations and their boundary conditions, describing the problem under consideration, are transformed into a system of ordinary differential equations by using usual similarity transformations. This system is solved numerically by applying Nachtsheim-Swigert shooting iteration technique together with Runge-Kutta sixth order integration scheme. The effects of suction parameter, heat generation parameter and Soret number are examined on the flow field of a hydrogen-air mixture as a non-chemical reacting fluid pair. The analysis of the obtained results showed that the flow field is significantly influenced by these parameters.

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