Experimental Verification of Heat-Flux Mitigation by Electromagnetic Fields in Partially-Ionized-Argon Flows

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.

[1]  Domenic D'Ambrosio,et al.  Electromagnetic Fluid Dynamics for Aerospace Applications. Part I: Classification and Critical Review of Physical Models , 2004 .

[2]  L. Lees.  Laminar Heat Transfer Over Blunt-Nosed Bodies at Hypersonic Flight Speeds , 1956 .

[3]  R. Ziemer,et al.  Experimental Investigation in Magneto-Aerodynamics , 1959 .

[4]  V. Bityurin,et al.  Ground MHD experiments in hypersonic flows , 2010 .

[5]  W. R. Sears,et al.  Magnetohydrodynamic Effects in Aerodynamic Flows , 1959 .

[6]  Domenic D'Ambrosio,et al.  Electromagnetic Fluid Dynamics for Aerospace Applications , 2007 .

[7]  M. C. Yuen,et al.  Experimental investigation of magnetoaerodynamic flow around blunt bodies. , 1967 .

[8]  P. Bouchardy,et al.  Coherent Anti-Stokes Raman Scattering Measurements and Computational Modeling of Nonequilibrium Flow , 2000 .

[9]  D. D'ambrosio,et al.  A Numerical Method for Two- Dimensional Hypersonic Fully Coupled Electromagnetic Fluid Dynamics , 2005 .

[10]  D. Giordano.  Hypersonic-Flow Governing Equations with Electromagnetic Files , 2002 .

[11]  Ali Gülhan,et al.  Internal Flowfield Investigation of a Hypersonic Inlet at Mach 6 with Bleed , 2007 .

[12]  A. Gülhan,et al.  Two Dimensional Spatially Resolved Two Photon Oxygen Atom Laser Induced Fluorescence Measurements In The Flow Field Of The Arc Heated Facility L3K , 2004 .

[13]  Ali Gülhan,et al.  Temperature Measurements by Laser-Induced Fluorescence Spectroscopy in Nonequilibrium High-Enthalpy Flow , 2000 .

[14]  B. Esser.  A Study on Heat Flux Measurements in High Enthalpy Flows , 2001 .

[15]  Ali Gülhan,et al.  Mars entry simulation in the arc heated facility L2K , 2002 .

[16]  D. Giordano,et al.  Electromagnetic Fluid Dynamics for Aerospace Applications. Part II: Numerical Simulations Using Different Physical Models , 2004 .

[17]  An Upwind Numerical Method for the Prediction of Ideal MHD High Speed Flows , 2004 .

[18]  Takashi Abe,et al.  Electro-Magnetic Effect on Shock Layer Structure in Reentry-Related High-Enthalpy Flow , 2004 .

[19]  R. Ziemer,et al.  MAGNETIC FIELD EFFECTS ON BOW SHOCK STAND-OFF DISTANCE , 1958 .

[20]  M. Yuen,et al.  Heat Transfer to a Hemispherical Body in a Supersonic Argon Plasma , 1973 .

[21]  Nicholas J. Bisek,et al.  Numerical study of magnetoaerodynamic flow around a hemisphere , 2010 .

[22]  V. A. Bityurin,et al.  MHD Flow Control in Hypersonic Flight , 2005 .

[23]  F. R. Riddell,et al.  Theory of Stagnation Point Heat Transfer in Dissociated Air , 1958 .

[24]  W. Sears,et al.  The Prospects for Magneto-Aerodynamics , 1958 .

[25]  Takashi Abe,et al.  Shock Layer enhancement by electro-magnetic effect for spherical blunt body , 2006 .

[26]  D. Giordano,et al.  Convergence of Chapman-Enskog calculation of transport coefficients of magnetized argon plasma , 2006 .

[27]  E. L. Resler,et al.  The Prospects for Magneto-Aerodynamics— Correction and Addition* , 1959 .