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Numerical Modeling for the Accurate Computations of Arc-Heater Flows
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- Authors
- Issue Date
- 2006-09-07
- Publisher
- ECCOMAS
- Citation
- ECCOMAS (The European Community on Computational Methods in Applied Science) CFD 2006, 5-8 June 2006, Egmond aan Zee, Netherlands
- Keywords
- 공학 ; Plasma wind tunnel ; Arc-Heater ; Joule heating ; Radiation ; Turbulence
- Abstract
- The purpose of this paper is to develop an accurate analysis code for the flow of
arc-heater by employing advanced numerical models. Governing equations are hyperbolictype
axisymmetric Navier-Stokes equations which include joule heating by arc, radiation and
turbulent transport effect. Joule heating is simply calculated by Ohms law with the given
distribution of current. Radiation is computed by the three-band model which accounts for
self-absorption and is consistent with the detailed line-by-line radiation model. Turbulence
effect is incorporated by two-equation turbulence models which can describe the transport of
turbulence. In order to assess the performance of the newly developed code, AHF and IHF
are calculated in various operating conditions. And, it is confirmed that two-equation
turbulence models combined with the three-band radiation model simulate the flow physics in
arc-heater more accurately than any other previous models and the influence of the
turbulence is as much as or bigger than radiation effect.
- Language
- English
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