Experimental Verification of Heat-Flux Mitigation by Electromagnetic Fields in Partially-Ionized-Argon Flows
| Autor: | Frank Siebe, Ali Gülhan, Detlev Konigorski, Domenico Giordano, Uwe Koch, Johannes Riehmer, Burkard Esser |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
Ionized flows
Electromagnetic field Materials science Field (physics) Displacement current business.industry Electrical engineering heat flux mitigation Aerospace Engineering Pitot tube arc heated facility L2K Computational physics law.invention Thermal conductivity Heat flux Space and Planetary Science law electro dynamic effects Thermography business Microwave |
| Zdroj: | Journal of Spacecraft and Rockets. 46:274-283 |
| ISSN: | 1533-6794 0022-4650 |
| DOI: | 10.2514/1.39256 |
| Popis: | This paper describes an experimental study on heat-flux mitigation within high-enthalpy ionized-argon flows by application of an external magnetic-induction field. Two different axially symmetric test models containing water-cooled magnet coils have been investigated. The models have been made of a material with low thermal conductivity to visualize surface-temperature distribution.The latter has been measured by infrared thermography. Heat-flux rates have been derived from measured front- and rear-surface temperatures, taking into account temperature-dependent material characteristics and considering radiative-cooling exchange to the environment. Flowfield properties have been quantitatively characterized by laser-induced fluorescence, microwave interferometry, emission spectroscopy, electrostatic probes, and pitot probes. In addition, high-quality video recordings and photographs have been taken for shock-layer visualization. Remarkable measured surface-temperature reductions (16 and 44%) and derived heat-flux mitigations (46 and 85%) have been observed in the presence of an externally applied magnetic-induction field. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|