Abstract:
A pulse detonation rocket engine, having at least two detonation chambers. The rocket propelled vehicle includes at least one fuel delivery system in fluid communication with each of the at least two detonation chambers, and at least one oxidant delivery system in fluid communication with the detonation chambers, along with fast-acting valves to inject fuel and oxidant controlledly into the chambers. An ignitor in each of the detonation chambers intermittently initiates detonation of a fuel and oxidant mixture in the chamber, in a controlled cycle, to provide motive force. Also provided is a combined cycle engine, able to operate in air breathing mode, oxidant augmented mode, and as a rocket engine. The combined cycle engine includes at least one detonation chamber, and may include a plurality of such chambers. The invention further provides methods of intermittently detonating sequentially created fuel and oxygen mixtures in these engines, and methods of using these engines.
Abstract:
The present invention relates to production of superhard materials.A carbon composition contains 18-38 wt. % of diamond having particle size of 40-120 .ANG. and graphite to make up 100 wt. % having particle size of 200-1000 .ANG..A process for producing the carbon composition consists in detonating a carbon-containing explosive having a negative oxygen balance, in a cooling medium containing 40-60 vol. % of carbon dioxide gas, not more than 2 vol. % of free oxygen, and a neutral gas to make up 100 vol. %.The present carbon composition will find predominant application as an abrasive for superfinish polishing.
Abstract:
An apparatus and method for reacting on articles of manufacture with radiation such as generated by an electron gun, laser or other means directed against a substrate wherein controlled movement of the substrate and/or the radiation is effected under the control of a computer. Controlled operation of the radiation and its movement against the substrate or the movement of the substrate during processing is effected by operating an automatic computer or master controller. An automatic article manipulator is also controlled in its operation to move the substrate prior to and after operation thereon with such radiation. A single computer or master controller may be employed to control the operation of the manipulator for removing the substrate from the vicinity of the radiation and replacing it with a new article to be operated on during the next cycle of operation of the radiation generating means.
Abstract:
A method for mechanically aligning oriented superconducting or permanently magnetic materials for further processing into constructs. This pretreatment optimizes the final crystallographic orientation and, thus, properties in these constructs. Such materials as superconducting fibers, needles and platelets are utilized.
Abstract:
A system for obtaining spherically symmetrical implosion of sample materials by directing radiant ignition energy onto a target which includes a spherically symmetrical core of selected sample material concentrically surrounded by a shell of high explosive material. The resulting implosive compression produces hydrodynamically controlled physical and/or chemical and/or metallurgical transformations of state in the sample material.
Abstract:
Shock wave formation of superconductive ceramic oxide electric and magnetic circuit elements with improved microstructures and mechanical properties.
Abstract:
A process for producing ultra-fine ceramic particles with the particle size of less than 1000 .ANG., which comprises the steps of forming powdered dust cloud of metal powder such as Si constituting a portion of aimed ceramic particles in a reaction gas containing the other portion of said aimed ceramic particles, igniting said powdered dust cloud to cause explosive burning and synthesizing said aimed ceramic particles and gathering said resulting ceramic particles. By the process, ceramic particles such as Al.sub.2 O.sub.3, MgO, SiO.sub.2, TiO.sub.2, TiN having particle size of 10-100 nm can be produced.
Abstract:
A thermal insulation system for a window comprising a roller blind carried by a roller blind mechanism which is arranged to be fixed to a window frame above a window to be insulated. The blind is adapted to be detachably connectable to the window frame by means of touch fastener (Velcro) strips carried by the longitudinal side edges and the free transverse edge of the blind and mating touch fastener strips carried by the frame. A mounting mechanism for the roller blind enables it to be selectively displaceable for sealing the upper end of the blind.
Abstract:
A gas-to-gas energy exchanger utilizing a commutator repetitively diverts a jet of a first pressurized gas between an energy exchange conduit and an exhaust outlet. Upon entering the energy exchange conduit, the first gas creates a pressure wave which traverses the conduit at sonic velocity and, in so doing, compresses a second gas in the conduit. The now pressurized second gas opens a first check valve and egresses through a primary outlet. When the first gas is diverted to the exhaust passage, a rarefaction wave is created in the energy exchange conduit and traverses the conduit at sonic velocity plus the velocity of the first gas still in the conduit. The energy exchange conduit length may be selected such that the rarefaction wave reaches the downstream end of the conduit before the previously entered slug of first gas to thereby prevent mixing of the first and second gases in the primary outlet; alternatively, the conduit length may be selected to permit any desired degree of such mixing. The rarefaction wave closes the first check valve and opens a second check valve which permits the second gas to enter the downstream end of the conduit. The rarefaction wave also reverses the flow direction of first fluid passed by the wave so that the first fluid is caused to flow back upstream in the conduit to be aspirated into the exhaust passage by the jet of first gas. The commutator is preferably a fluidic oscillator, but may be a mechanically driven device; in either case the frequency is selected to provide desired operation consistent with the conduit length. Two such commutators may be employed, operating in 180.degree. phase relation, so that a constant flow of the second gas may be provided from half cycle to half cycle.