High-Speed Magnetohydrodynamic Flow Control Analyses With 3-D Simulations
Abstract
Magnetohydrodynamic studies of high-speed flow control are described with emphasis on understanding fluid response to specific plasma-based perturbations. Detailed analysis is presented of the effect of magnitudes and gradients of magnetic and electric fields, their orientation relative to the velocity vector, ionized region location and extent, and various nondimensional parameters. The balance between ponderomotive force and heating is a major determinant of the effectiveness through competition between work and ohmic dissipation, while viscous/inviscid interactions play a crucial role by distorting the velocity field. The interaction with an external circuit through electrodes is relatively efficient when fluid is slowed and energy is extracted, but yields high boundary layer heating and loss of control performance when fluid is accelerated. These observations are employed to unify results focused on a broad range of objectives including heat transfer reduction, 3-D separation suppression through momentum transfer, inviscid instability growth rate modulation and energy management in multiple simulated tip-to-tail scramjet designs
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 2008
- Accession Number
- ADA476039
Entities
People
- Datta V. Gaitonde
Organizations
- Air Force Research Laboratory