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Abstract:
The results of the present work demonstrate the Lorentz force effect on the supersonic boundary layer in M = 3 flows of nitrogen ionized by a transverse RF discharge in the presence of the magnetic field. Boundary layer density fluctuation spectra are measured using the Laser Differential Interferometry (LDI) diagnostics. In particular, decelerating Lorentz force applied to the flow produces a well reproduced increase of the densify fluctuation intensity by up to 10-20% (1-2 dB), compared to the accelerating force of the same magnitude applied to the same flow. The effect is produced for two possible combinations of the magnetic field and MHD current directions producing the same Lorentz force direction (both for accelerating and decelerating force). The effect is observed to increase with the flow conductivity.
| Limitations: |
 APPROVED FOR PUBLIC RELEASE |
| Description: |
Final rept. 1 Apr 2002-31 Dec 2004 |
| Pages: |
50 |
| Report Date: |
28 SEP 2005 |
| Contract Number: |
F496200210164 |
| Report Number: |
A704734 |
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