Radial model of gas temperature in metal vapor active media

2018 ◽  
Keyword(s):  
Metal Vapor ◽  
Gas Temperature ◽  
Active Media ◽  
Radial Model

scholarly journals High Prf Metal Vapor Laser Active Media For Visual And Optical Monitoring

2016 ◽  
Vol 671 ◽  
pp. 012060 ◽  
Author(s):  
S N Torgaev ◽  
M V Trigub ◽  
G S Evtushenko ◽  
T G Evtushenko
Keyword(s):  
Metal Vapor ◽  
Optical Monitoring ◽  
Vapor Laser ◽  
Active Media

Kinetics of the active media of high-pressure metal-vapor lasers

1993 ◽  
Vol 23 (7) ◽  
pp. 545-563 ◽  
Author(s):  
A V Karelin ◽  
Sergei I Yakovlenko
Keyword(s):  
High Pressure ◽  
Metal Vapor ◽  
Active Media ◽  
Metal Vapor Lasers ◽  
Kinetics Of

Determination of the Active Medium Temperature in Media Based Press Hardening Processes

2014 ◽  
Vol 136 (2) ◽  
Author(s):  
Welf-Guntram Drossel ◽  
Norbert Pierschel ◽  
Alexander Paul ◽  
Klaus Katzfuß ◽  
Rico Demuth
Keyword(s):  
Active Medium ◽  
Lightweight Design ◽  
Temperature Curve ◽  
Work Piece ◽  
Gas Temperature ◽  
Forming Process ◽  
Element Analysis ◽  
Medium Temperature ◽  
Press Hardening ◽  
Active Media

Safety, lightweight design, and reduction of emissions are terms which are key issues in modern vehicle construction. These challenges can be met by new lightweight design strategies, e.g., by using lightweight materials and high-strength steels as well as innovative forming technologies such as media based press hardening (MBPH). MBPH as a sub-production technique of hydroforming is a tempered internal high-pressure forming process of closed profiles, which this article is about, or sheet metals by gaseous media. Due to the high process requirements (internal pressure up to 70 MPa and temperatures up to 1000 °C), it has not been possible to measure the temperature curve of the active medium in a reliable way until now. The aim of the research project described in this article was to develop an innovative measuring instrument to determine the gas temperature curve with a measuring frequency of at least 1 Hz. Analytical and numerical calculations have indicated that the active medium has a significant influence on the thermodynamic of the forming process. The finite element analysis (FEA) of the heat flow during the forming process has indicated that the influence of the gas on the cooling process of the work piece is about 15% of the total influence of the tool. Consequently, the active medium in media based press hardening processes is an important thermal influencing factor. Experiments have confirmed that it is possible to determine the calculated curve of the gas temperature and maximum temperatures of the active media up to 500 °C. The findings of these studies make a significant contribution to identifying and analyzing the complete temperature balance in tempered active media based forming processes.

scholarly journals Semiclassical Approach to the Nonlocal Kinetic Model of Metal Vapor Active Media

Mathematics ◽  
2021 ◽  
Vol 9 (23) ◽  
pp. 2995
Author(s):  
Alexander V. Shapovalov ◽  
Anton E. Kulagin
Keyword(s):  
Differential Equation ◽  
Partial Differential Equation ◽  
Cauchy Problem ◽  
Kinetic Equation ◽  
Linear Partial Differential Equation ◽  
Metal Vapor ◽  
Problem Solution ◽  
Semiclassical Approach ◽  
Active Media ◽  
The Cauchy Problem

A semiclassical approach based on the WKB–Maslov method is developed for the kinetic ionization equation in dense plasma with approximations characteristic of metal vapor active media excited by a contracted discharge. We develop the technique for constructing the leading term of the semiclassical asymptotics of the Cauchy problem solution for the kinetic equation under the supposition of weak diffusion. In terms of the approach developed, the local cubic nonlinear term in the original kinetic equation is considered in a nonlocal form. This allows one to transform the nonlinear nonlocal kinetic equation to an associated linear partial differential equation with a given accuracy of the asymptotic parameter using the dynamical system of moments of the desired solution of the equation. The Cauchy problem solution for the nonlinear nonlocal kinetic equation can be obtained from the solution of the associated linear partial differential equation and some algebraic equations for the coefficients of the linear equation. Within the developed approach, the plasma relaxation in metal vapor active media is studied with asymptotic solutions expressed in terms of higher transcendental functions. The qualitative analysis of such the solutions is given.

Possibility of creating a projection stereomicroscope based on metal-vapor active media

1997 ◽  
Author(s):  
Mishik A. Kazaryan ◽  
Yury P. Vasil'ev ◽  
Nikolay P. Korotkov ◽  
Harazat M. Kazaryan ◽  
Nikolay A. Lyabin
Keyword(s):  
Metal Vapor ◽  
Active Media

A High-Frequency Pumping Source for Metal Vapor Active Media

2020 ◽  
Vol 63 (1) ◽  
pp. 62-67
Author(s):  
S. N. Torgaev ◽  
D. N. Ogorodnikov ◽  
I. S. Musorov ◽  
A. E. Kulagin ◽  
G. S. Evtushenko
Keyword(s):  
High Frequency ◽  
Metal Vapor ◽  
Active Media

scholarly journals Temperature regulator for containers with working substance in high-frequency metal vapor active media

2019 ◽  
Vol 1327 ◽  
pp. 012048
Author(s):  
E G Bukreev ◽  
O A Kozhemyak ◽  
I S Musorov ◽  
D N Ogorodnikov ◽  
V V Drobchik
Keyword(s):  
High Frequency ◽  
Metal Vapor ◽  
Temperature Regulator ◽  
Active Media
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