Separated Flow Problems within the Transonic and Supersonic Flow Regimes.

1979 ◽  
Author(s):  
W. L. Chow
Keyword(s):  
Supersonic Flow ◽  
Separated Flow ◽  
Flow Regimes ◽  
Flow Problems

Flow Around a Conical Nose with Rounded Tail Projectile for Subsonic, Transonic, and Supersonic Flow Regimes : A Numerical Study

2014 ◽  
Vol 64 (6) ◽  
pp. 509-516
Author(s):  
Amitesh Kumar ◽  
◽  
H.S. Panda ◽  
T.K. Biswal ◽  
R. Appavuraj ◽  
...  
Keyword(s):  
Supersonic Flow ◽  
Numerical Study ◽  
Flow Regimes

Viscid-Inviscid Interaction of Incompressible Separated Flows

1976 ◽  
Vol 43 (3) ◽  
pp. 387-395 ◽  
Author(s):  
W. L. Chow ◽  
D. J. Spring
Keyword(s):  
Viscous Flow ◽  
Pressure Coefficient ◽  
Separated Flow ◽  
Inviscid Flow ◽  
Turbulent Jet ◽  
Tunnel Wall ◽  
Flow Process ◽  
Jet Mixing ◽  
Flow Problems ◽  
Flow Components

A flow model has been devised to deal with the viscid-inviscid interaction of a class of two-dimensional incompressible separated flow problems. It is suggested that the corresponding inviscid flow of these problems is described by the free streamline theory with few unspecified parameters and their values are, in turn, determined by the viscous flow considerations. The problem of a flow past a backward facing step is selected for study in detail. The viscous flow components of turbulent jet mixing, recompression, and reattachment are delineated and studied individually. When they are later combined, it is found that the point of reattachment behaves as a saddle-point-type singularity in the system of differential equations describing the viscous flow process. This feature is employed to the determination of the aforementioned free parameters and thus the establishment of the overall corresponding inviscid flow field. The resulting base pressure coefficient for the specific case agrees reasonably well with the available experimental data. Additional calculations are performed to demonstrate the influence of higher Reynolds numbers and the values of the similarity (or spread rate) parameter σ of the “constant pressure” turbulent jet mixing process. Further studies of redevelopment of the viscous flow after reattachment, the turbulent exchange within the recompression and redevelopment regions, and the effect of wind tunnel-wall interference on the overall flow patterns have been suggested and discussed.

An Euler-Based Throughflow Approach for an Axial Turbine at Supersonic Flow Regimes

2021 ◽  
Author(s):  
Sebastian Föllner ◽  
Dieter Brillert ◽  
FriedrichKarl Benra
Keyword(s):  
Supersonic Flow ◽  
Flow Regimes ◽  
Axial Turbine

Perspective: Selected Benchmarks From Commercial CFD Codes

1995 ◽  
Vol 117 (2) ◽  
pp. 208-218 ◽  
Author(s):  
C. J. Freitas
Keyword(s):  
Three Dimensional ◽  
Separated Flow ◽  
Policy Statement ◽  
Two Dimensional ◽  
Three Dimensional Flow ◽  
Common Reference ◽  
Reynolds Number Flow ◽  
Flow Problems ◽  
Dimensional Flow ◽  
Two Dimensional Flow

This paper summarizes the results of a series of five benchmark simulations which were completed using commercial Computational Fluid Dynamics (CFD) codes. These simulations were performed by the vendors themselves, and then reported by them in ASME’s CFD Triathlon Forum and CFD Biathlon Forum. The first group of benchmarks consisted of three laminar flow problems. These were the steady, two-dimensional flow over a backward-facing step, the low Reynolds number flow around a circular cylinder, and the unsteady three-dimensional flow in a shear-driven cubical cavity. The second group of benchmarks consisted of two turbulent flow problems. These were the two-dimensional flow around a square cylinder with periodic separated flow phenomena, and the steady, three-dimensional flow in a 180-degree square bend. All simulation results were evaluated against existing experimental data and thereby satisfied item 10 of the Journal’s policy statement for numerical accuracy. The objective of this exercise was to provide the engineering and scientific community with a common reference point for the evaluation of commercial CFD codes.

Analysis of Pressure Pulsations on the Wall in a Flat Diffuser Channel in Unseparated and Separated Flow Regimes

2019 ◽  
Vol 57 (1) ◽  
pp. 100-106
Author(s):  
S. S. Dmitriev ◽  
S. M. S. O. Mokhamed ◽  
A. V. Barbashin
Keyword(s):  
Separated Flow ◽  
Flow Regimes ◽  
Pressure Pulsations

External burning on curved surfaces in supersonic flow - Problems and limitations

1997 ◽  
Author(s):  
Giuseppe Bussi ◽  
Dario Pastrone ◽  
Alessandro Rellecati ◽  
Giuseppe Bussi ◽  
Dario Pastrone ◽  
...  
Keyword(s):  
Supersonic Flow ◽  
Curved Surfaces ◽  
Flow Problems

The method of characteristics for steady supersonic rotational flow in three dimensions

1956 ◽  
Vol 1 (4) ◽  
pp. 409-423 ◽  
Author(s):  
Maurice Holt
Keyword(s):  
Supersonic Flow ◽  
Method Of Characteristics ◽  
Equations Of Motion ◽  
Three Dimensional ◽  
Three Dimensions ◽  
Rotational Flow ◽  
Conical Flow ◽  
Plane Flow ◽  
Flow Problems ◽  
The Method Of Characteristics

The method of characteristics for steady supersonic flow problems in three dimensions, due to Coburn & Dolph (1949), is extended so that flow with shocks and entropy changes may be treated. Equations of motion based on Coburn & Dolph's characteristic coordinate system are derived and a scheme is described for solving these by finite differences.A linearized method of characteristics is developed for calculating perturbations of a given three-dimensional field of flow. This is a generalization of the method evolved by Ferri (1952) for perturbations of plane flow and conical flow.

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