988 results about "Blast wave" patented technology

A shock wave applicator includes a shock wave generator and an asymmetrical reflector portion in a housing. Asymmetry of the reflector portion is combined with one or more wave generators to produce a variety of focal volumes and wave fronts for medical treatment.

Partial or total occlusions of fluid passages within the human body are removed by positioning an array of optical fibers in the passage and directing treatment radiation pulses along the fibers, one at a time, to generate a shock wave and hydrodynamic flows that strike and emulsify the occlusions. A preferred application is the removal of blood clots (thrombi and emboli) from small cerebral vessels to reverse the effects of an ischemic stroke. The operating parameters and techniques are chosen to minimize the amount of heating of the fragile cerebral vessel walls occurring during this photoacoustic treatment. One such technique is the optical monitoring of the existence of hydrodynamic flow generating vapor bubbles when they are expected to occur and stopping the heat generating pulses propagated along an optical fiber that is not generating such bubbles.

According to one aspect of the invention, a pulse detonation tool is provided for fracturing subterranean formations. The pulse detonation tool includes a pulse detonation combustor and creates an isolated zone within a wellbore. The tool generate a series of repeating supersonic shock waves that are directed into the subterranean formation to cause propagation of multiple fractures into the formation. According to another aspect of the invention, a method and system for fracturing a subterranean formation using pulse detonation is provided.

The system for treating an internal organ has a generator source for producing a shock wave connected to a portable shock wave applicator device, wherein the shock wave applicator device has a side-firing shock wave head having a variable angle adjustment relative to a release and lock connected handle or holder means for holding said device. The inclination of the shock wave head can be set to a fixed inclination to reach the organ at various locations or surfaces or can be pivotally inclined continuous to vary the treatment surfaces area.

The invention relates to the field of laser processing manufacture, in particular to a laser shock precision forming method and a device. The device comprises a laser, an outer light path system, a laser shock head system A, a flying optical processing system with a laser shock head system B, a test sample system, a detection feedback system, a multi-axis link machine tool and a tool fixture system, a central control processor and a control system. A laser beam emitted by the laser is split by the outer light path system and are respectively transmitted to the front and the rear surfaces of a workpiece to subject the front and the rear surfaces of the double-sided workpiece with an energy absorption layer and a confinement layer to laser-induced shock wave. According to the requirements of the shape and the formation rule of a plate material, the double-sided laser shock head can execute simultaneous and non-simultaneous shock, counter shock, staggered shock, shocks with same and different energy, etc., so that the plate material is formed by generating a certain plastic deformation and a stress field distribution and that a certain residual stress is formed on the surface of the plate material. The method can achieve accurate quantitative formation, good repeatability and high forming efficiency, and can easily achieve automatic production.

The invention relates to an improved apparatus for the comminution of concretions in vivo by controlled, concentrated cavitation energy using two shock wave pulses with a specified time delay and pressure relationship, with the first shock wave pulse being used to induce a transient cavitation bubble cluster near the target concretion, and the second shock wave pulse to control and force the collapse of the cavitation bubble cluster towards the target concretion with concentrated energy disposition while avoiding injury to surrounding tissue. The invention contemplates the use of an improved combined electrohydraulic or electromagnetic and a piezoelectric annular array shock wave generator to produce improved stone comminution with reduced tissue injury in vivo.

System for converting high frequency quantum electrodynamic radiation energy and at least one atom through cavity vacuum fluctuations and converting same into a superconductive electrical implosion propulsion energy from zero point energy at a frequency that is amenable to conversion to electrical and implosive propulsion and superconductive energy extracted within an environment having a desired voltage and a reversed waveform such that the emitted energy returns into the system to be recycled. In an externally winged craft comprising a selectively shaped vacuum cohesive fuselage and means for providing lift and propulsion for an aircraft generating an enormous electrostatic vortex lifting force when energized in conjunction with the quantum electrodynamic vortex implosion propulsion system and power plant maximizing fuel efficiencies including the extraction of usable energy from the vacuum of space. Actually riding on or in the shock waves verses the brute force disruption of the environment's equilibrium, as is the case with conventional modes of transportation or aircraft design.

A vehicle hull has a longitudinal blast mitigation duct formed between left and right hull portions. The duct includes a first section oriented at a first angle to a longitudinal reference line, and a second section adjacent to the first section and oriented at a second angle to the reference line. The second angle is greater than the first angle to form a diverging surface for a shock wave travelling from the first to the second section. The blast mitigation duct further comprises a second, rearward-oriented diverging surface for a shock wave travelling rearward along the hull. A rib projects generally perpendicular from a joint between the first and second sections and is configured to initiate separation of the shock wave from the hull, thereby reducing the amount of energy transferred to the hull.

A nuclear fusion power plant having a spherical blast-chamber filled with a liquid coolant that breeds tritium, absorbs neutrons, and functions as both an acoustical and laser medium. Fuel bubbles up through the sphere's base and is positioned using computer guided piezoelectric transducers that are located outside the blast-chamber. These generate phase-shifted standing-waves that tractor the bubble to the center. Once there, powerful acoustic compression waves are launched. Shortly before these reach the fuel, an intense burst of light is pumped into the sphere, making the liquid laser-active. When the shockwaves arrive, the fuel temperature skyrockets and it radiates brightly. This, photon-burst, seeds outgoing laser cascades that return, greatly amplified, from the sphere's polished innards. Trapped within a reflecting sphere, squeezed on all sides by high-density matter, the fuel cannot cool or disassemble before thorough combustion. The blast's kinetic energy is absorbed piezoelectrically.

A shock wave in a gas is modified by emitting energy to form an extended path in the gas; heating gas along the path to form a volume of heated gas expanding outwardly from the path; and directing a path. The volume of heated gas passes through the shock wave and modifies the shock wave. This eliminates or reduces a pressure difference between gas on opposite sides of the shock wave. Electromagnetic, microwaves and/or electric discharge can be used to heat the gas along the path. This application has uses in reducing the drag on a body passing through the gas, noise reduction, controlling amount of gas into a propulsion system, and steering a body through the gas. An apparatus is also disclosed.

The invention relates to the field of pulse power technology applications and energy exploitation technology, in particular to a method of electrically exploding wires to generate shock waves in waterby driving energy containing mixtures. The method of the electrically exploding wires to generate the shock waves in water by driving the energy containing mixtures comprises the following steps thata specific pulse power drive source is used to drive the wires of different materials, different diameters, and different lengths to cause an electrical explosion, the phase transition time, discharge current waveform and emission spectrum intensity of the corresponding wires are recorded; shock wave loads of different formulations are made and underwater shock wave experiments are correspondingly performed; shock wave probes are used to measure shock wave waveform and compared with the required waveform to determine the corresponding relationship between shock wave specific impulse and the shock wave loads; and according to the required shock wave parameters and the corresponding relationship between the shock wave specific impulse and the shock wave loads, a corresponding shock wave load is selected to be placed between the high and low voltage electrodes at the output end of the pulse power drive source and is driven under water to generate a controlled shock wave.

An apparatus and seismic method for producing an shock wave in an oil well borehole, with a pumping unit arranged at the wellhead, a tubing string extending downward into the production casing of the well, a hollow cylinder assembly connected with the bottom of the tube string, and pair of plungers arranged within the cylinder assembly and connected with the pumping unit with sucker rods and a polish rod for compressing liquid contained within the cylinder assembly and discharging the compressed liquid into the production casing, thereby generating a shock wave. The cylinder assembly includes an upper cylinder, a lower cylinder below the upper cylinder, a crossover cylinder below the upper and lower cylinders, and a compression chamber cylinder containing a compression chamber arranged between the crossover cylinder and the upper cylinder. The lower cylinder is adapted to receive the lower plunger, and the upper cylinder is adapted to receive the upper plunger. The lower plunger has a larger diameter than the upper plunger, and the plunger movement effects the volume of the compression chamber by reduction, the liquid contained therein becomes compressed and is discharged on the down stroke into the well. In addition, remote seismic data is collected and processed from remote well locations.

A blast shockwave shield including an upright, monolithic body having a lateral center, and front and back sides, and a blast-facing, curved strike face formed on the upright, front side of the body, including a pair of companion, laterally spaced, laterally symmetric, non-coextensive, curved, strike-face portions, each of which defines a blast shockwave-deflection vector that is aimed upwardly, and laterally outwardly away from the shield's lateral center. This structure implements a method for blast shockwave deflection which includes the steps of engaging and intercepting such a shockwave with an upright, monolithic, solid-resistance instrumentality having a pair of laterally spaced, curved, non-coextensive strike-face portions, and, by those acts of engaging and intercepting, reversely deflecting an impinging shockwave.

A method of using one or more microjets to create and/or control oblique shock waves. The introduction of microjet flow into a supersonic stream creates an oblique shock wave. This wave can be strengthened—by increasing microjet flow rate or the use of many microjets in an array—in order to form an oblique shock. Such an oblique shock can be used to decelerate flow in a jet aircraft engine inlet in a controlled fashion, thus increasing pressure recovery and engine efficiency while reducing flow instability. Adjusting the pressure ratio across the microjet actually alters the angle of the oblique shock. Thus, the use of microjets allows decelerating shock waves in an inlet engine to be properly positioned and controlled. Microjet arrays can also be used to ameliorate shock waves created by external aircraft surfaces, such as sensor pods and weapons. Microjets placed forward of any external protuberance can convert a single substantial shock wave into a series of much milder waves which will not produce unwanted external effects, such as strong sonic booms.

The invention relates to a bidirectional energy-accumulating tension forming blasting pipe, belonging to the energy-accumulating blasting device field. The conventional energy-accumulating blasting is to use the energy-accumulating device to linearly accumulate energy (such as ABS slotted pipe), and the detonation shock wave releases energy along the cutting joint of the energy-accumulating device, which generates the linear impact pressure action on hole wall and results in that the substance to be exploded generates the vertical radial crack surface along a blast hole. At present, the invention is mainly applied to the directional blasting of soft rock. If the substance to be exploded has the high compressive strength, the effect is limited. Due to the adoption of a PVC pipe and the bidirectional energy-accumulating hole, the invention generates the tension action on the substance to be exploded when blasting, which thereby can fully use the characteristic of that the tensile strength is far less than the compressive strength in order to generate the tension forming blasting effect. Therefore, the invention is far better than the conventional energy-accumulating blasting in forming effect, peripheral hole mark rate, explosive consumption, blast hole drilling volume, overbreak volume and other aspects.

Disclosed are a sound attenuation sleeve for use on a piling during underwater construction and a method of using such a sleeve for attenuating underwater transmission of sound and/or shock waves during underwater pile driving operations.

An engine contains at least one pulse detonation combustor which is surrounded by a bypass flow air duct, through which bypass air flow is directed. The bypass air duct contains at least one converging-diverging structure to dampen or choke the upstream propagation of shock waves from the pulse detonation combustor through the bypass flow air duct. The bypass air also serves to cool the outer surfaces of the pulse detonation combustor. The bypass air flow is controlled in tandem with the heat release from the PDC to provide the appropriate amount of thermal energy to a downstream energy conversion device, such as a turbine. A mixing plenum is positioned downstream of the pulse detonation combustor and bypass flow air duct.