11 results about "Flame structure" patented technology

The invention provides a gas turbine flame tube with an adjustable cross flame tube, which is characterized in that a square hole is formed in the original cross flame tube position of the flame tube, and groove-shaped structures are welded on three edges of the square hole to form a U-shaped clamping groove; an inserting piece with a cross flame tube structure is inserted into the U-shaped clamping groove, and the two flame tubes are connected through the cross flame tube. The cross flame tube of the flame tube is designed to be of a detachable structure, in the research and development and design stage of the flame tube, the performance of different cross flame tubes can be conveniently tested, the machining number of flame tube test pieces is reduced, the research and development efficiency is improved, the experiment cost is reduced, and resources are saved.

The present invention provides a high-speed image analysis method suitable for identifying the interaction structure between flames in multi-jet flames, and belongs to the technical field of flame structure analysis. The present invention processes the flame self-luminescence / induced fluorescence image taken by a high-speed camera through a digital image processing method to identify the overlapping area between multi-jet flames, and specifically includes the following steps: selecting the analysis area, dividing the analysis area, Gaussian filtering, feature corner point detection, feature corner point supplementation, optical flow field calculation, flame area discrimination, flame outer contour recognition, and adjacent flame interaction extraction. The present invention discloses a high-speed image analysis method suitable for identifying the interaction structure between flames in multi-jet flames, which can identify the interaction structure between multiple flames from the flame image, and has high recognition efficiency. It can provide a method for further analyzing the interaction between flames and is very suitable for use in the field of flame structure research in multi-nozzle combustion chambers.

The present invention is a magnetically powered electrically controlled solid propellant combustion performance test system and method. It includes a support frame, an ignition device, a magnetic sheet, an electromagnet, a PD stress control integrated module, a data acquisition subsystem and a PC terminal; a magnetic sheet is connected below the ignition device, and a PD stress control integrated module is arranged below the ignition device, and an electromagnet is arranged thereon. The PD stress control integrated module regulates the current to make the force between the ignition device and the electromagnet constant, thereby pushing the ignition device electrically controlled solid propellant to slide and maintaining dynamic contact between the propellant and the positive and negative electrodes. The present invention is suitable for testing electrically controlled solid propellants of various systems. The parameters of the entire area of ​​the system can be modulated by the PC terminal, and the combustion performance of the electrically controlled solid propellant, such as multi-stage ignition delay time, energy required for ignition, dynamic burning rate, dynamic current, burning rate adjustable ability with electricity, combustion temperature, flame structure morphology and flameout delay time, can be diagnosed simultaneously.

The invention discloses an experiment system and method for interaction of liquid fuel high-pressure combustion flames and a wall surface, and relates to the technical field of engines, different working conditions in an engine are simulated through a controllable combustion reaction cavity adjusted in a high-pressure range, and the collision process of the flames in an engine cylinder and the wall surface is simulated through a flat plate slit combustor. Meanwhile, an electrical automatic control device is adopted to control variable conditions in a combustion experiment, and systematic research on the flame-wall surface physical and chemical reaction process is achieved. According to the experimental system, the stability, flame structure and pollutant emission of the efficient combustion process of the engine within extremely short time can be deeply studied. Besides, the experimental device integrates and adopts the Internet of Things technology, so that the operation is simple and convenient, the experimental data is visualized, the physical and chemical action mechanism between the gas-phase flame and the solid-phase wall surface is disclosed, and important reference is provided for the improvement and the structural optimization of the efficient and clean combustion technology of the engine.

The invention discloses a multi-modal fusion storage tank fire near-field radiation prediction method, which comprises the following steps of: 1, building reduced scale experiment devices for different numbers of storage tank fire under the action of a wind field, acquiring a multi-oil-pool flame image and a near-field radiation signal, and constructing a multi-fire-source experiment data set; 2, establishing a deep convolutional feature extraction network based on VGG16, obtaining multi-channel deep features representing a flame structure, brightness distribution and a turbulence form through a flame image, mapping the number and the position of a fire source and the quality of an oil product into same-dimension vectors, and constructing a multi-source fusion feature set; 3, constructing a Transformer-CNN-BiLSTM near-field radiation prediction model, fusing space and time characteristics, and realizing radiation dynamic prediction under different field conditions, wind field disturbance and oil product combustion states; and 4, constructing a loss function for training an optimal prediction model. According to the invention, the real-time prediction of the combustion rate and the near-field radiation distribution can be realized based on the flame image and the multi-source physical information in a complex environment, and the accuracy and the dynamic response capability of fire monitoring are improved.

The utility model provides an electric fireplace with a multi-section jumping flame structure, which relates to the technical field of electric fireplaces and comprises a fireplace body, an LED (light-emitting diode) lamp, a plurality of sprayers and a protective device. The water mist sprayed out of the upper end of the furnace body can be shielded and protected by using the protection device, the protection device comprises a square tube, a bolt, a connecting plate, a placing frame and glass, the square tube is arranged at the upper end of the furnace body, the water mist sprayed out of the spray head is prevented from being blown away or blown away by wind, and the glass is arranged at the upper end of the furnace body. Therefore, the visual effect of the flame is influenced, and the use effect of the electric fireplace is improved.

The invention discloses a structure for improving fire safety of a closed sandwich type combustible material. The structure comprises an outer closed structure layer, a combustible functional material layer, a fireproof layer and a flame-retardant plate. The surface of the combustible functional material layer is designed to be equidistant wave-shaped, protruding parts of the combustible functional material layer are subjected to fireproof flame-retardant treatment, a fireproof flame-retardant plate is arranged in the material layer and perpendicular to the outer structural layer, and a fireproof layer is arranged on the outer side to cover the protruding parts to jointly form a fireproof treatment structure. When fire hazards occur, local vortexes can be formed on the surface of the wave-shaped structure, flow resistance is increased, the chimney effect is restrained, and the flame diffusion speed is reduced. And on the other hand, the fireproof flame-retardant plate covers and protects flammable and easily-damaged parts and supports an external structural layer, the overall structural strength is improved, structural damage and vertical diffusion of flames are hindered, and the overall fireproof performance of the structure is improved.

The invention provides a high-speed image analysis method suitable for identifying an interaction structure between flames through multi-jet-flow flames, and belongs to the technical field of flame structure analysis. According to the invention, flame self-luminous / induced fluorescence images shot by a high-speed camera are processed through a digital image processing method, so that the overlapping areas among the multi-jet flames are identified; the method specifically comprises the following steps of analysis area selection, analysis area segmentation, Gaussian filtering, feature corner point detection, feature corner point supplementation, optical flow field calculation, flame area discrimination, flame outer contour recognition and adjacent flame interaction extraction. According to the high-speed image analysis method suitable for identifying the interaction structure between the flames by the multi-jet-flow flames, the interaction structure between the flames can be identified from the flame image, the identification efficiency is high, a method can be provided for further analyzing the interaction between the flames, and the method is suitable for popularization and application. The device is very suitable for being used in the field of flame structure research in a multi-nozzle combustion chamber.

The utility model relates to a kind of low NOx short flame ethylene cracking furnace combustor, including air bellow, firebrick, gas collector, staged fuel gas branch pipe, primary nozzle, secondary nozzle and air distributor, each staged fuel gas branch pipe connects primary nozzle and secondary nozzle, the primary nozzle enters the intermediate combustion passageway in firebrick, the secondary nozzle is stretched out from firebrick periphery, the firebrick periphery is equipped with the fire-igniting inclined plane that converges inward to secondary nozzle, the firebrick top end surface is equipped with flame platform, the fire-igniting inclined plane is equipped with flat flame tunnel corresponding each secondary nozzle, the flat flame tunnel is set below flame platform, the flat flame tunnel is through in and out radially to firebrick.The utility model reduces NOx, optimizes air by air distributor, changes fuel injection and flame structure, to reduce flame length, the height of flame is dynamically fed back by CO probe, real-time monitoring is carried out to the height of flame, ensure combustion stability.

The application provides a device and method for synchronous imaging of flame structure, flow field structure and flow field velocity, which comprises generating 283.55nm laser and 355nm laser, transmitting and integrating the two lasers into sheet laser, and then making the sheet laser incident to a flame region of hydrocarbon fuel combustion in a combustion chamber; imaging a first fluorescent signal generated by exciting CH2O in the flame by the 355nm laser to obtain a transient structure of a preheating zone of the flame; imaging a second fluorescent signal generated by exciting OH in the flame by the 283.55nm laser to obtain a transient structure of a burned zone of the flame; and imaging a flow field structure of the flame region by using pulse schlieren and imaging a flow field velocity distribution of the flame region by using schlieren velocity measurement. The application realizes synchronous high-time-resolution imaging of flame multi-zone structure, schlieren and schlieren velocity measurement.