13 results about "Vapor cloud" patented technology

The invention discloses a method for predicting the explosion intensity of a steam cloud based on a flame velocity. The method comprises the following steps: constructing a flame propagation prediction formula by integrating factors such as a gas cloud limitation degree, obstacle blockage, steam cloud activity and a flame propagation distance; collecting data in different scenes for fitting analysis, and determining values of undetermined parameters in the flame propagation prediction formula in different scenes; solving a flame propagation prediction formula to obtain a dimensionless flame velocity based on the value of the undetermined parameter in the target scene, and determining an actual flame velocity in combination with the sound velocity; based on the determined actual flame speed, predicting the explosion overpressure through a relational expression between the actual flame speed and the explosion overpressure established in the target scene; based on the predicted explosion overpressure, the explosion impulse is predicted through a relational expression between the explosion overpressure and the explosion impulse established in the target scene; and representing the explosion intensity of the steam cloud based on the predicted explosion overpressure and explosion impulse. The method is simple in process, high in reliability and wide in application range.

The embodiment of the invention discloses a hazardous chemical accident simulation analysis method. A specific embodiment of the method comprises the following steps: for hazardous chemicals involved in a leakage accident to be simulated, determining the attributes of the hazardous chemicals and the container attributes of the hazardous chemicals; based on the container attribute and the hazardous chemical substance attribute, whether leakage is instantaneously released or continuously released is judged, so that an accident scene is determined; selecting a simulation model matched with the accident scene from a plurality of preset simulation models as a target simulation model; performing simulation analysis on the accident related information by using the target simulation model, and determining simulation result information; displaying simulation result information; wherein the various simulation models comprise at least two of the following models: a vapor cloud explosion model, a diffusion model, a jet fire model, a boiling liquid expansion vapor cloud explosion model and a liquid pool fire model. Therefore, a novel simulation analysis mode of the dangerous chemical accident is provided.

A system for generating a hydrogen-infused electrolytic aerosol for wellness applications that may include a housing with a water tank containing an aqueous electrolyte solution, at least one ultrasonic transducer positioned in the water tank to form a vapor cloud of the aqueous electrolyte solution, and a hydrogen generation unit that generates hydrogen gas that is combined with the vapor cloud in a mixing chamber that is presented to a conveyance path connected to the enclosure where a first light source emits light to illuminate the vapor cloud.

This invention discloses a hydrogen- or ammonia-blended fuel jet fire experimental system, combustion diagnosis method, and equipment, which can solve problems such as experimental scale distortion, fragmented disaster chain process, and insufficient intelligent control. It realizes integrated simulation of the entire chain from leakage and vapor cloud diffusion to fire decay, and can obtain experimental data that matches real major accidents. It eliminates the data distortion and blind spots of segmented and isolated experiments, and reduces the control complexity and operational intensity of large-scale complex experiments.

A method of making stable clusters of atoms that are of subcritical size, in which rapid expansion and rapid cooling of a vapor cloud takes place in which the vapor conditions or parameters are controlled so that multiple stable clusters, each with a size less than the critical size and formed from sub-critical nucleation, are condensed.

The invention relates to the technical field of industrial control, in particular to a steam cloud explosion overpressure calculation method, system and equipment, a medium and a program product. According to the method, static data and dynamic data of a target area are obtained, event simulation is carried out, diffusion analogue simulation data representing the leakage dynamic diffusion process of leakage substances corresponding to a target event are obtained, and therefore overpressure calculation is carried out based on the diffusion analogue simulation data; explosion overpressure data representing pressure value distribution of the explosion shock waves at different positions of the target area are obtained, so that the accuracy and efficiency of overpressure data calculation are improved, and chemical production safety is guaranteed.

The utility model relates to the technical field of spherical tank explosion suppression and heat insulation, in particular to a spherical tank explosion suppression and heat insulation system which comprises a monitoring unit, a water spraying unit and a control unit. The monitoring unit is used for monitoring whether overpressure and / or overtemperature occurs around the spherical tank or not, the water spraying unit is used for spraying water to the periphery and the upper portion of the spherical tank, and the control unit is used for controlling the spherical tank when the monitoring unit monitors that overpressure and / or overtemperature occurs around the spherical tank. And the water spraying unit is controlled to spray water to the periphery and the upper portion of the spherical tank, and an isolation water curtain is formed. In practical application, by means of the explosion-proof and heat-insulation system for the spherical tank, in the combustible vapor cloud explosion and / or flame heat radiation environment, the situation that the spherical tank is damaged due to the fact that the combustible vapor cloud explosion and / or flame heat radiation directly act on the spherical tank for a long time can be avoided in the mode that high-strength water curtains are formed on the periphery and the upper portion of the spherical tank.

A method for producing stable atomic clusters of subcritical size, wherein a vapor cloud undergoes rapid expansion and rapid cooling, wherein vapor conditions or parameters are controlled so that a plurality of stable clusters are condensed, each of which has a size less than a critical size and is formed by subcritical nucleation.

A system includes a heat exchanger chamber that has a headspace zone above an innage zone. The innage zone is for receiving liquid nitrogen and for producing a nitrogen vapor cloud in the headspace zone. There is a heat exchanger situated in the headspace zone that is enveloped by the nitrogen vapor cloud. A first cooling loop runs through a heater tank and a cooling passage of at least one component. The first cooling loop is configured to circulate a working fluid. A second cooling loop runs through at least the heater tank and the heat exchanger. The second cooling loop also circulates the working fluid. A nitrogen recycle loop runs through at least the heat exchanger chamber and a nitrogen condenser. The nitrogen recycle loop is configured to capture the nitrogen vapor cloud, convert the nitrogen vapor cloud into liquid, and return the liquid to the innage zone.

The utility model provides an evaporation auxiliary device with a steam cloud guiding function. The evaporation auxiliary device comprises a heating plate combination, a first connecting block and a second connecting block, wherein the first connecting block and the second connecting block are arranged at the two ends of the heating plate combination respectively; the heating plate combination comprises at least two heating plates which are arrayed in parallel, connecting columns are arranged at the two ends of each heating plate, and the heating plates are movably connected to the first connecting block and the second connecting block through the connecting columns; and the evaporation auxiliary device is suspended right above the evaporation boat and is clamped between the two electrodes. According to the evaporation auxiliary device, the steam cloud guiding function is achieved through flexible adjustment of the angle of the heating plate, the test period is shortened as much as possible while the sheet resistance uniformity is adjusted, the effective breadth of the sheet resistance of a product is improved, the molten metal splashing probability is reduced, and large-scale application and popularization are facilitated.

The application discloses a kind of simulation non-uniform rocket kerosene vapor cloud combustion experiment device and method in oxygen-rich atmosphere, including simulation oxygen-rich atmosphere tank, gas supply system, heating temperature control system, multi-channel electric ignition system, data test acquisition system and exhaust system;Gas supply system is connected in sequence external oxygen gas cylinder, gas flowmeter, one-way valve to oxygen-rich atmosphere tank;Silicone rubber electric hot plate in heating temperature control system is fixed in the inner wall of oxygen-rich atmosphere tank, oil pool heater is fixed in the bottom of oxygen-rich atmosphere tank;Multi-channel electric ignition system includes adjustable igniter, ignition electrode;In data test acquisition system, hydrocarbon sensor, first oxygen sensor extends to outside multichannel data acquisition module, transmission module and computer;The exhaust system is respectively connected with second oxygen sensor and vacuum pump.The application simulates non-uniform concentration field distribution formed by rocket kerosene heated evaporation diffusion in oxygen-rich atmosphere under actual environmental conditions and tests its vapor cloud combustion characteristics, with good reliability and strong practicability.

The present invention provides a method and system for igniting natural gas in a full-scale gas explosion test. The ignition method includes the following steps: determining the positions and angles of a plurality of igniter cartridge launching devices relative to the explosion test pipeline according to the static model of natural gas explosion and the mass of natural gas in the explosion test pipeline; determining the time for the plurality of igniter cartridge launching devices to launch igniter cartridges and the specifications of the igniter cartridges; the plurality of igniter cartridge launching devices launch the corresponding-specification igniter cartridges according to the determined time for launching the igniter cartridges, and ignite the natural gas escaping from the explosion test pipeline. Among them, the plurality of igniter cartridge launching devices are arranged near the explosion test pipeline according to the determined positions and angles. The present invention quantitatively calculates the height and diameter of the natural gas and air mixed vapor cloud, so as to determine the height, angle and time of igniter cartridge launching, making the entire ignition process safe and controllable, and significantly reducing the environmental pollution of natural gas and the uncontrollable explosion risk during the test.

A method of making stable clusters of atoms that are of subcritical size, in which rapid expansion and rapid cooling of a vapor cloud takes place in which the vapor conditions or parameters are controlled so that multiple stable clusters, each with a size less than the critical size and formed from sub-critical nucleation, are condensed.