National Technical Reports Library

The National Technical Information Service acquires, indexes, abstracts, and archives the largest collection of U.S. government-sponsored technical reports in existence. The NTRL offers online, free and open access to these authenticated government technical reports. Technical reports and documents in its repository may be available online for free either from the issuing federal agency, the U.S. Government Publishing Office’s Federal Digital System website, or through search engines.

Details

Effects of Space Charge in a Hypersonic Magnetohydrodynamic Power Generator.

ADA473277

Publication Date	2007
Personal Author	Thibodeaux, R. J.
Page Count	34
Abstract	This paper explores a new MHD generator design that uses space charge to create an axial-symmetric electric field in the region between concentrically cylindrical channels. The space charge fraction is shown to have a significant effect in the current density, power density, electric field, output voltage, efficiency, pressure drop, and enthalpy. The radial symmetry produces simple analytic solutions for these equations over a wide range of gas flow speeds. Adjustments in the space charge can be used to regulate the output voltage of the generator for a constant magnetic field. This technique can eliminate the need for a full output power conditioner.
Keywords	Hypersonic characteristics Space charge Magnetohydrodynamic generators Magnetic fields Symposia Current density Gas flow Supersonic combustion ramjet engines Channels Electric fields Cylindrical bodies Axisymmetric Hypersonics Scramjet(Supersonic combustion ramjet engines)
Source Agency	Non Paid ADAS
NTIS Subject Category	46 - Physics 46B - Fluid Mechanics 46G - Plasma Physics
Corporate Authors	Air Force Research Lab., Wright-Patterson AFB, OH. Propulsion Directorate.
Supplemental Notes	Presented at the AIAA Plasmadynamics and Laser Conference (37th), International Conference on Magnetohydrodynamics (16th), held in Miami, FL, on 25 Jun 2007. The original document contains color images. All DTIC reproductions will be in black and white.
Document Type	Technical Report
Title Note	Conference paper (postprint).
NTIS Issue Number	200804

Effects of Space Charge in a Hypersonic Magnetohydrodynamic Power Generator.

Effects of Space Charge in a Hypersonic Magnetohydrodynamic Power Generator.
ADA473277

Publication Date	2007
Personal Author	Thibodeaux, R. J.
Page Count	34
Abstract	This paper explores a new MHD generator design that uses space charge to create an axial-symmetric electric field in the region between concentrically cylindrical channels. The space charge fraction is shown to have a significant effect in the current density, power density, electric field, output voltage, efficiency, pressure drop, and enthalpy. The radial symmetry produces simple analytic solutions for these equations over a wide range of gas flow speeds. Adjustments in the space charge can be used to regulate the output voltage of the generator for a constant magnetic field. This technique can eliminate the need for a full output power conditioner.
Keywords	Hypersonic characteristics Space charge Magnetohydrodynamic generators Magnetic fields Symposia Current density Gas flow Supersonic combustion ramjet engines Channels Electric fields Cylindrical bodies Axisymmetric Hypersonics Scramjet(Supersonic combustion ramjet engines)
Source Agency	Non Paid ADAS
NTIS Subject Category	46 - Physics 46B - Fluid Mechanics 46G - Plasma Physics
Corporate Authors	Air Force Research Lab., Wright-Patterson AFB, OH. Propulsion Directorate.
Supplemental Notes	Presented at the AIAA Plasmadynamics and Laser Conference (37th), International Conference on Magnetohydrodynamics (16th), held in Miami, FL, on 25 Jun 2007. The original document contains color images. All DTIC reproductions will be in black and white.
Document Type	Technical Report
Title Note	Conference paper (postprint).
NTIS Issue Number	200804