One-dimensional flow structure in Hall thrusters

2002 ◽  
Author(s):  
M. Martinez-Sanchez ◽  
E. Ahedo ◽  
D.Q. king
Keyword(s):  
Flow Structure ◽  
Hall Thrusters ◽  
One Dimensional ◽  
Dimensional Flow

Deflagrations and discontinuities in laser-produced plasmas

1983 ◽  
Vol 29 (3) ◽  
pp. 415-438 ◽  
Author(s):  
G. J. Pert
Keyword(s):  
Laser Irradiation ◽  
Flow Structure ◽  
One Dimensional ◽  
Dimensional Flow ◽  
Flux Limitation

The structure of deflagrations in one-dimensional flow is examined in detail. It is shown that the rule that deflagrations be weak or Chapman-Jouget must be obeyed unless a non-hydrodynamic discontinuity occurs. Such flows are shown to be unique and stable, once the downstream expansion is specified. It is shown that non-hydrodynamic discontinuities, if strong, are accompanied by a compression leading to a weak termination. The application to plasmas produced by laser irradiation of a solid is investigated and the flow structure in the presence of flux limitation evaluated.

One-dimensional Flow Structure in Standpipe Flow : Experiment, DEM Analysis and Development of Plug Flow Model

2003 ◽  
Vol 2003.78 (0) ◽  
pp. _14-39_-_14-40_
Author(s):  
Yuu HORII ◽  
Toshihiro KAWAGUCHI ◽  
Toshitsugu TANAKA ◽  
Yutaka TSUJI
Keyword(s):  
Flow Structure ◽  
Flow Model ◽  
Plug Flow ◽  
One Dimensional ◽  
Dimensional Flow ◽  
Flow Experiment ◽  
Dem Analysis

Performance Prediction for Automotive Turbocharger Compressors

1975 ◽  
Vol 189 (1) ◽  
pp. 557-565 ◽  
Author(s):  
A. Whitfield ◽  
F. J. Wallace
Keyword(s):  
Performance Prediction ◽  
Flow Analysis ◽  
Compressor Stage ◽  
Thermodynamic Models ◽  
Flow Rates ◽  
Design Point ◽  
One Dimensional ◽  
Dimensional Flow ◽  
Performance Map ◽  
The Individual

A procedure to predict the complete performance map of turbocharger centrifugal compressors is presented. This is based on a one-dimensional flow analysis using existing published loss correlations that were available and thermodynamic models to describe the incidence loss and slip factor variation at flow rates which differ from the design point. To predict the losses within the complete compressor stage using a one-dimensional flow procedure, it is necessary to introduce a number of empirical parameters. The uncertainty associated with these empirical parameters is assessed by studying the effect of varying them upon the individual losses and upon the overall predicted performance.

An Evaluation of the Average Flow Model [1] for Surface Roughness Effects in Lubrication

1980 ◽  
Vol 102 (3) ◽  
pp. 360-366 ◽  
Author(s):  
J. L. Teale ◽  
A. O. Lebeck
Keyword(s):  
Surface Roughness ◽  
Flow Model ◽  
Two Dimensional ◽  
Roughness Effects ◽  
Important Conclusion ◽  
Average Flow ◽  
One Dimensional ◽  
Dimensional Flow ◽  
Two Dimensional Flow ◽  
Average Flow Model

The average flow model presented by Patir and Cheng [1] is evaluated. First, it is shown that the choice of grid used in the average flow model influences the results. The results presented are different from those given by Patir and Cheng. Second, it is shown that the introduction of two-dimensional flow greatly reduces the effect of roughness on flow. Results based on one-dimensional flow cannot be relied upon for two-dimensional problems. Finally, some average flow factors are given for truncated rough surfaces. These can be applied to partially worn surfaces. The most important conclusion reached is that an even closer examination of the average flow concept is needed before the results can be applied with confidence to lubrication problems.

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