42 results about "Magnetohydrodynamics" patented technology

Disclosed is an interplanetary rocket propulsion to Mars and the Moons of the nearer outer Planets by means of 6000° K temperature, 100 atmosphere pressure, power generation and propulsion systems that utilize a gas cooled nuclear reactor and metal powder combustion, in combination with water wherein dissociation into oxygen to react with certain metals to form on board retained metal oxides, and to heat the hydrogen from dissociated water as well as on-board liquid hydrogen that is seeded with an alkali metal for use in a linear, Faraday magnetohydrodynamic (MHD) generator that is coaxial with a MHD accelerator for propulsion, wherein water and probable metal sources on planetary bodies would provide rocket fueling by metal oxide reprocessing to metal and for manned permanent life support bases, and for search of high value minerals, gold, silver, aluminum, rare minerals, diamonds, for transport with their lesser gravity back to Earth.

The invention provides a symmetrical electromagnetic structure based on a magnetohydrodynamic satellite attitude control actuator, which includes an annular pipe; a fluid chamber is formed inside the annular pipe; the fluid chamber is filled with conductive fluid; the outer side of the annular pipe is connected along the radial direction There is a first electrode; the inner side of the annular pipe in the radial direction is connected with a second electrode; the first electrode is arranged opposite to the second electrode; one end of the second electrode in the axial direction extends radially outward to lead out the electrode , the lead-out electrode is separated from the first electrode (the second electrode and the lead-out electrode are an integral part); in the radial direction, a first permanent magnet is arranged on the outside of the first electrode, and a second permanent magnet is arranged on the inside of the second electrode. magnet. The invention adopts a reasonable and symmetrical magnetic circuit, which can better realize a uniformly distributed magnetic field; the current flowing through the path avoids the influence of the current on the magnetic field, and is slightly wider than the magnetic field of the electrode, avoiding the edge attenuation of the magnetic field, so that the electromagnetic force is within the main range of action The magnetic field is evenly distributed.

The invention discloses an arc voltage gradient modeling method based on magnetohydrodynamics simulation. According to the description of classical arc physical characteristics and the definition of fluid, it is based on Maxwell's equation, air equation, energy equation and fluid mechanics equation. The combined mathematical expression of the arc fault is reproduced on the simulation platform based on the MHD analysis method taking into account the multi-scenario physical characteristics of the arc fault evolution description, and the MHD dynamic model is constructed by means of numerical analysis, which avoids the complexity of on-site measurement and has a good simulation Combined ability, it can accurately predict the voltage gradient of medium and low voltage short arc, and provide a reference for medium and low voltage arc fault protection.

The invention relates to a parallel wire-array Z-pinch load which comprises an anode sleeve, a cathode sleeve, an anode plate, a cathode plate, a wire array, an insulating positioning sheet, two springs, two double-step positioning rods and two spring positioning rods, wherein the anode plate is fixed in the anode sleeve; the cathode plate is fixed in the cathode sleeve; and the wire array is arranged between the anode plate and the cathode plate. The invention solves the technical problem that the current column load is subjected to magneto fluid mechanics to cause instability in the pinch process to an axis, and the invention has the advantage that tight and uniformly distributed parallel wire-array Z-pinch load is provided in a pinch experiment.

The invention discloses dual-layer-flow liquid first wall cladding applicable to a magnetic confinement fusion reactor. The cladding structurally comprises a vacuum chamber, liquid metal injection pipes at the top of the vacuum chamber, an outer cladding back wall adopting a spiral insulated runner structure, an inner cladding back wall and a bottom liquid metal discharge structure. In order to solve problems of the MHD (magnetohydrodynamics) effect, the thinning effect and the like encountered by a liquid first wall during application to the fusion reactor, a special structural design is adopted: for inner cladding, the inlet injection pipes inject a liquid metal downwards from the top of the vacuum chamber along the inner cladding back wall; for outer cladding, the liquid metal is injected in the circumferential direction of the vacuum chamber, is closely attached to the outer cladding back wall and flows downwards under the effect of the centrifugal force produced due to the inertia, and overwhelms a spiral insulated runner arranged on the outer cladding back wall, so that a circumferential flow in the insulated runner and a free surface flow outside the runner are formed. The liquid metal finally flows into the bottom liquid metal discharge structure and is applied to heat transfer, tritium extraction and recycling, and the problems of the MHD effect and the thinning effect can be effectively solved.