Magnetogasdynamic effects on acoustic waves in MHD generators
Abstract
The solutions of an MHD dispersion relationship have been examined to analyze the magnetogasdynamic effects on the acoustic and entropy waves in an MHD generator, with emphasis on both the magnetoacoustic phase velocities and wave amplitudes. The analysis was facilitated by the introduction of a new nondimensional frequency which incorporates the effects of frequency and the magnetic interaction parameter in one variable. To measure the relatively small effects predicted for laboratory-scale MHD generators, special experimental methods were developed based on the use of a low-frequency acoustic excitation and the analysis of the phase difference between pressure signals measured at different locations in the MHD generator. Preliminary results from experiments performed using the Stanford M-2 MHD generator facility demonstrate good agreement between the experimental data and solutions of the MHD dispersion relationship.
- Publication:
-
Journal of Propulsion and Power
- Pub Date:
- April 1987
- Bibcode:
- 1987JPP.....3..171C
- Keywords:
-
- Magnetoacoustics;
- Magnetohydrodynamic Generators;
- Plasma Dynamics;
- Sound Waves;
- Acoustic Excitation;
- Amplitudes;
- Entropy;
- Phase Velocity;
- Wave Dispersion;
- Plasma Physics