Numerical solution of the problem of profiling the subsonic part of a laval nozzle for flows of radiating gas

1981 ◽  
Vol 21 (5) ◽  
pp. 278-285
Author(s):  
V.M. Krivtsov ◽  
I.L. Osipov
Keyword(s):  
Numerical Solution ◽  
Laval Nozzle ◽  
Subsonic Part

Investigation of the reflection of perturbations from the subsonic part of a laval nozzle

1975 ◽  
Vol 8 (1) ◽  
pp. 75-83
Author(s):  
A. N. Kraiko ◽  
A. A. Osipov
Keyword(s):  
Laval Nozzle ◽  
Subsonic Part

Exact solutions for flow of a perfect gas in a two-dimensional Laval nozzle

1950 ◽  
Vol 203 (1075) ◽  
pp. 551-571 ◽  
Keyword(s):  
Flow Field ◽  
Exact Solutions ◽  
Infinite Series ◽  
Laval Nozzle ◽  
Two Dimensions ◽  
Two Dimensional ◽  
Perfect Gas ◽  
Hodograph Method ◽  
Sonic Point ◽  
Subsonic Part

A family of exact solutions is found for the problem of steady irrotational isentropic shockfree transsonic flow of a perfect gas through a Laval nozzle in two dimensions. The hodograph method is used, whereby the position co-ordinates x , y are expressed in terms of the velocity variables; the expressions are infinite series in the subsonic part of the flow field, infinite integrals (analytic continuations of the series) in the supersonic part. An inversion is required to get the velocity as a function of position; in general, this requires detailed numerical calculations, but approximate formulae (62) are found for the neighbourhood of the sonic point on the axis.

Backscattering Analysis of Cylinder Shaped Scatterer in Vegetation Medium: Comparison Between Theories

2020 ◽  
Vol 2 (1) ◽  
pp. 15-18
Author(s):  
Syabeela Syahali ◽  
Ewe Hong Tat ◽  
Gobi Vetharatnam ◽  
Li-Jun Jiang ◽  
Hamsalekha A Kumaresan
Keyword(s):  
Numerical Solution ◽  
Cross Section ◽  
Traditional Method ◽  
Microwave Remote Sensing ◽  
Solution Model ◽  
Complex Nature ◽  
Good Match ◽  
Equivalent Source ◽  
Backscattering Cross Section ◽  
Method Model

This paper analyses the backscattering cross section of a cylinder both using traditional method model and a new numerical solution model, namely Relaxed Hierarchical Equivalent Source Algorithm (RHESA). The purpose of this study is to investigate the prospect of incorporating numerical solution model into volume scattering calculation, to be applied into microwave remote sensing in vegetation area. Results show a good match, suggesting that RHESA may be suitable to be used to model the more complex nature of vegetation medium.

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