23 results about "Combustion analysis" patented technology

The invention relates to the technical field of boiler induced draft fans, and discloses a boiler induced draft fan speed regulation system based on self-adaptive control, which is characterized in that a data acquisition module acquires outlet flue gas flow velocity data and flue gas oxygen content data of a boiler furnace at different sampling moments; the flow velocity analysis module performs time segmentation on the sampling time to obtain a plurality of time intervals, and determines a hearth outlet flue gas flow velocity fluctuation factor according to outlet flue gas flow velocity data; the combustion analysis module determines instantaneous flue gas oxygen content data and calculates a hearth combustion deviation factor; and the speed adjusting module performs weighted summation on the hearth outlet flue gas flow velocity fluctuation factor and the hearth combustion deviation factor to obtain a hearth comprehensive influence coefficient, performs speed regulation on the boiler induced draft fan according to the hearth comprehensive influence coefficient, and realizes multi-source monitoring analysis of the boiler hearth based on time sequence change and data change. Therefore, the dynamic and accurate speed regulation of the induced draft fan is ensured, the combustion efficiency of the boiler is improved, the energy consumption is reduced, and the stability and reliability of system operation are enhanced.

To accurately and promptly predict a pulverized coal flame combustion form.SOLUTION: In regard to a technical field of combustion analysis, a training method for a pulverized coal flame prediction model and a pulverized coal flame form prediction method are disclosed. The training and prediction methods include: acquiring a sample pulverized coal flame image, a sample combustion parameter and a sample flame form type; pretreating the sample pulverized coal flame image and constructing a training set and a validation set; inputting the flame image to an initial pulverized coal flame form prediction model constructed beforehand and extracting main features of the flame image; constructing a feature vector by combining the main features with a training combustion parameter, performing dispersion analysis of a training flame form different from the feature vector, and sorting an influence parameter; and training the initial pulverized coal flame form prediction model by using the influence parameter, the training flame form and the validation set and obtaining a target pulverized coal flame form prediction model.SELECTED DRAWING: Figure 1

A rotor engine comprehensive bench test system and test method belong to the technical field of engine test. The system contains rotor engine, AC power dynamometer, main control unit and other groups of modules. The dynamometer can realize forward and reverse reversible rotation of the engine. The main control unit is provided with forward and reverse switching and three-stage alarm module. Each component is connected and communicated. Sensors, acquisition modules, analyzers and the main control unit are cooperatively networked. The test method sequentially completes bench building, system inspection, pre-starting verification, lubrication establishment, engine starting, top dead center searching, mechanical loss test, warming, full-range boundary monitoring, hot-state running-in, ECU online calibration and data evaluation. The combustion analyzer can calculate cylinder pressure parameters. ECU modified parameters take effect immediately. Data analysis covers power and economic indicators. The present invention solves the problem that existing benches cannot adapt to rotor engine tests, builds a safe and efficient comprehensive test platform and provides technical support for rotor engine research and development.

The present invention provides a sodium fire combustion analysis method, system, electronic device and storage medium, the method comprising: constructing a spatial model of a process room where sodium fire combustion occurs, the spatial model being constructed to include a gas space, a wall surface located at the top of the process room, and a sodium pool located below the flame zone of the sodium fire combustion, wherein the gas space is simplified to include an upper gas space node, a lower gas space node and a bottom gas space node, the upper gas space node being adjacent to the wall surface, the lower gas space node being adjacent to the flame zone surface of the sodium fire combustion, and the bottom gas space node being adjacent to the ground of the process room; according to the combustion conditions and gas circulation conditions of the sodium fire combustion, the temperature and pressure of the gas at the upper gas space node, the lower gas space node and the bottom gas space node are obtained based on the mass balance principle and the energy balance principle. The present invention can obtain the impact of a sodium fire combustion accident on different areas of the process room.

The application discloses a coal-based solid waste filling fire prevention and extinguishing intelligent early warning method, system, device and medium, the method first obtains the environmental physical quantity data and network state original data of the filling area through the wireless mesh network including the anchoring node and the drift node, then carries out signal propagation analysis on the network state original data, extracts the signal propagation abnormal characteristics caused by environmental medium disturbance, obtains the first perception quantity, at the same time, carries out combustion analysis on the environmental physical quantity data, extracts the physicochemical abnormal characteristics related to the combustion process, obtains the second perception quantity, then carries out space-time correlation calculation on the first perception quantity and the second perception quantity in the same space-time range, obtains the coupling risk index, and generates the early warning instruction when the coupling risk index exceeds the preset risk threshold. The application can improve the reliability, accuracy and early perception ability of the coal-based solid waste filling area hidden fire source early warning.

According to the technical scheme, the 320-cylinder-diameter dual-fuel engine electric control system is characterized by comprising a main MCU control module and an FPGA real-time monitoring module which are connected with each other, the FPGA real-time monitoring module is connected with a security module, the security module is connected with a fuel gas leakage monitoring module, and meanwhile, the FPGA real-time monitoring module is connected with the fuel gas leakage monitoring module. A data receiving end of the security module is connected with the sensor, the ESD button and the oil mist detector, and a control signal output end of the security module is connected with the GVU pressure regulating valve, the exhaust valve, the alarm device and the fuel oil stop valve; the FPGA real-time monitoring module is connected into the Ethernet and the hard wiring harness, the pressure sensor, the temperature sensor, the liquid level switch, the on-site remote change-over switch, the combustion analyzer, the waste gas bypass valve, the gas valve, the main lubricating oil pump, the exhaust ventilation valve, the exhaust valve, other auxiliary equipment, the cartridge valve, the gas adjusting valve and buttons of the LOP module are connected into the hard wiring harness, and a display screen of the LOP module is connected into the Ethernet. According to the other technical scheme, the invention provides an electronic control method for the 320 cylinder diameter dual-fuel engine based on multi-mode cooperative control.

A combustion analyzer unit includes an array of primary sensors in the analyzer unit operably connected to a primary probe. The distal end of the primary probe is configured for insertion into a combustion system flue to conduct gas to the primary sensors for diagnosing and maintaining the furnace. An optional integrated CO sensor in the combustion monitor housing for sensing CO in the space adjacent to the furnace and flue and a removable CO monitor is detachably integrated into the combustion analyzer unit housing to be worn or carried by the technician during furnace testing and maintenance.

The technical scheme of the utility model discloses a 320-cylinder-diameter dual-fuel engine electric control system based on multi-mode cooperative control, which is characterized by comprising a main MCU control module and an FPGA real-time monitoring module which are connected with each other, the FPGA real-time monitoring module is connected with a security module, the security module is connected with a gas leakage monitoring module, and meanwhile, the FPGA real-time monitoring module is connected with the gas leakage monitoring module. A data receiving end of the security module is connected with the sensor, the ESD button and the oil mist detector, and a control signal output end of the security module is connected with the GVU pressure regulating valve, the exhaust valve, the alarm device and the fuel oil stop valve; the FPGA real-time monitoring module is connected into the Ethernet and the hard wiring harness, the pressure sensor, the temperature sensor, the liquid level switch, the on-site remote change-over switch, the combustion analyzer, the waste gas bypass valve, the gas valve, the main lubricating oil pump, the exhaust ventilation valve, the exhaust valve, other auxiliary equipment, the cartridge valve, the gas adjusting valve and buttons of the LOP module are connected into the hard wiring harness, and a display screen of the LOP module is connected into the Ethernet.

The invention relates to a gas combustion appliance detection method and device, and the method comprises the steps: recognizing the equipment model of a to-be-detected gas combustion appliance, loading a corresponding detection process template according to the equipment model, and enabling the detection process template to comprise a standard test parameter, a module scheduling sequence and an early warning threshold value; distributing standard test parameters in the detection process template to a test module, wherein the test module comprises an air tightness detection module, a combustion analysis module and an electrical safety detection module; according to a module scheduling sequence in the detection process template, scheduling a corresponding test module to detect the gas combustion appliance, and determining a subsequent test mode according to a detection result of the to-be-detected gas combustion appliance; and after the detection of the to-be-detected gas combustion appliance is finished, performing fusion analysis on a detection result after the detection of the to-be-detected gas combustion appliance is finished based on a pre-trained anomaly identification model, and generating a corresponding diagnosis report. The method has the effect of improving the detection efficiency.

The utility model discloses a combustion analysis and measurement system, comprising: a combustion chamber, in which a crucible for placing a sample is arranged, the combustion chamber is provided with an igniter, and the igniter is used for igniting the sample to generate combustion gas; the gas supply assembly is used for introducing oxygen into the combustion chamber; the stirring assembly is arranged in the combustion chamber and used for uniformly mixing gas in the combustion chamber; the detection gas channel is connected with the combustion chamber and used for outputting mixed gas, and a pressure controller is arranged on the detection gas channel and used for outputting the mixed gas with preset pressure; the testing assembly is connected with the detection gas channel, is used for receiving the mixed gas and is used for detecting the element content in the mixed gas. Compared with the prior art, the combustion analysis and measurement system provided by the utility model has the advantages that the equipment cost and the labor cost required by testing can be reduced, and the testing process is effectively simplified.

The present invention relates to the field of engine technology, and specifically to a method for establishing a diesel engine in-cylinder combustion analysis model. The top clearance structure of a closed combustion chamber is simplified into a top sloping roof structure with the same volume; the combustion chamber volume formed by the top of the piston and the bottom of the cylinder head when the engine piston is at the bottom dead center is used as the stroke volume; the annular gap structure formed by the piston, piston ring, and cylinder liner is extracted from the lower part of the stroke volume to form a piston ring gap, and the outer diameter of the piston ring gap is equal to the outer diameter of the stroke volume; the piston bowl shape is extracted from the lower part of the stroke volume, and the center line of the piston bowl shape coincides with the stroke volume; according to the piston axis, the top sloping roof structure, stroke volume, piston ring gap, and piston bowl shape are assembled to form a combustion analysis model. The combustion chamber model is constructed using the top sloping roof structure, stroke volume, piston ring gap, and piston bowl-shaped components, which is suitable for rapid in-cylinder combustion simulation analysis while ensuring the accuracy of the prediction results.

The invention relates to the technical field of vehicle range extenders, discloses a method for facilitating performance calibration of a range extender system, and aims at solving the problems that an existing range extender system is low in calibration efficiency and insufficient in fuel and electric energy conversion efficiency. The method comprises the following steps that a high-voltage loop of a range extending system is in butt joint with an energy feedback type power cabinet, and calibration electric energy recovery and power generation parameter real-time monitoring are achieved; a high-precision combustion analyzer is introduced, and the combustion state and working condition stability in an engine cylinder are optimized; a two-dimensional gridding management strategy of the opening degree and the rotating speed of the throttle valve is adopted, and continuous sampling points are divided in a full-scale mode to cover all working conditions; regulating and controlling the rotating speed and the opening degree of a throttle valve to complete calibration of each working condition point, recording core data and drawing a performance MAP; and an optimal working curve is screened and solidified to a generator controller (GCU), and combined regulation and control are carried out through the GCU and an electronic injection controller. According to the method, the fuel economy and the electric energy conversion efficiency of the range extender are remarkably improved, the calibration period is shortened, and the operation stability and robustness of the system are guaranteed.

A system for synthesizing biodiesel from a mixed oil feedstock consisting of equal parts of waste grease and Pongamia oil, the system comprising: (a) a pretreatment and mixing unit configured to filter the crude oils and mix them uniformly at elevated temperature and controlled agitation speed to form a homogenized blended oil; (b) a titration and analysis unit designed to determine the free fatty acid (FFA) content of individual and mixed oils to assess suitability for direct interesterification; (c) a transesterification unit comprising a reactor with controlled parameters, including the alcohol to oil molar ratio, catalyst concentration, reaction temperature and reaction time, to convert the blended oil into biodiesel by base-catalyzed transesterification; (d) a biodiesel purification unit configured to wash and dry the raw biodiesel to remove impurities, catalyst residues and glycerin and to obtain ASTM D6751-compliant biodiesel; (e) an optimization module using an Entropy-VIKOR multi-criteria decision technique to determine optimal transesterification parameters based on biodiesel yield and fuel properties; and (f) a performance evaluation unit comprising a diesel engine test bench, emission and combustion analyzers and a data acquisition system for evaluating the produced biodiesel blends in terms of thermal efficiency, specific energy consumption, emissions and cylinder pressure characteristics.

The application relates to a boiler flame identification method and device, which comprises the following steps: obtaining operation data from a discrete control system based on computational fluid dynamics, obtaining a flame combustion video, and extracting flame images of several working condition frames; obtaining a basic combustion physical field corresponding to the working condition based on the operation data, and obtaining flame image regions of the working condition frames and their corresponding contours based on region segmentation of the flame images; mining the basic combustion physical field and the flame image regions and their corresponding contours to obtain numerical features and graph features, wherein the numerical features comprise physical field features at different height layers of the boiler, and the graph features comprise multilayer features; performing heterogeneous feature fusion combustion state analysis according to the numerical features and the graph features to determine the advantages and disadvantages and the combustion stability of the boiler combustion state. The application has the effects that the boiler combustion analysis result is more materialized and can be explained, and more accurate boiler operation adjustment strategies are provided.

The application discloses a linear internal combustion power generation system combustion heat release analysis method and system, and belongs to the technical field of linear internal combustion power generation systems. The method comprises the following steps: obtaining basic design and operation information of a linear internal combustion power generation system; obtaining key signals for combustion heat release analysis of the linear internal combustion power generation system under a given working condition, and pre-processing the key signals; calculating the combustion heat release rate, fuel consumption and heat release in a cycle of the linear internal combustion power generation system in a combustion heat release process; performing characteristic analysis on the combustion cycle of the linear internal combustion power generation system until the characteristic analysis is completed on all cycles; and counting combustion performance, stability and economic evaluation indexes of the linear internal combustion power generation system under the given working condition. The method provided by the application can obtain accurate and effective system combustion analysis results, and is helpful to the practical development of the linear internal combustion power generation system.

An embodiment of the present application provides a method for calibrating a retarding ignition angle, a storage medium, a powertrain, and an automobile. The calibration method includes: determining a plurality of operating conditions of the engine according to the intake air temperature of the engine, the load of the engine, and the rotational speed of the engine; obtaining the corresponding temperature coefficient for each operating condition according to all the determined operating conditions; acquiring the corresponding basic ignition angle and retardation coefficient for each preset operating condition, where the preset operating condition is the operating condition corresponding to the initial intake air temperature among all the determined operating conditions; and obtaining the retarding ignition angle corresponding to the operating condition at different intake air temperatures for the corresponding load and the corresponding rotational speed according to the corresponding basic ignition angle and retardation coefficient for each preset operating condition, and the temperature coefficient corresponding to the operating condition at different intake air temperatures for the corresponding load and the corresponding rotational speed. The retarding angle calibration method provided by the embodiment of the present application avoids the need for repeated calibration using a combustion analyzer and a knock speaker when performing temperature correction on the retarding ignition angle, and improves the calibration efficiency.

The present application relates to the technical field of combustion analysis equipment, and discloses a multi-fuel adaptive modular plume separation and detection device, comprising: a simulated combustion module, a flue module, a separation and collection module and a detection module mounted on a main support; the simulated combustion module comprises a combustion furnace mounted on the main support and an air blower for injecting dilution gas into the gas guide end of the combustion furnace; the flue module comprises a flue pipe mounted on the main support, and one end of the flue pipe is in communication with the flue port of the combustion furnace. The multi-fuel adaptive modular plume separation and detection device realizes dynamic, continuous and full-space disturbance of the plume, effectively destroys the settling conditions of plume particles, prevents the loss of components caused by the gravity settling of solid particles and droplets, eliminates the local concentration difference of the plume in the separation tank, ensures the uniformity of the plume concentration field, provides complete and uniform samples for detection, and improves the accuracy of detection data from the source.

The invention belongs to the technical field of laser ignition, and relates to an automatic continuous laser ignition combustion analysis experimental device for metal polymorphic energetic materials, which comprises a gas supply system, a combustion system, an automatic feeding system, a sample dispersion system, a sample tabletting system and a combustion data acquisition system. The combustion system comprises a quartz plate, a combustion platform and a transparent quartz cover. The automatic feeding system comprises a feeder and a conveying belt. The feeder comprises a storage bin, a rotating shaft, a distribution disc and a discharging bin. Four holes are formed in the material distribution disc, each hole contains a sample used for a single experiment, and when the material distribution disc rotates to the position above the quartz plate, the samples fall onto the quartz plate through the discharging bin. According to the invention, the high-temperature combustion system, the automatic feeding system, the sample dispersing system and the sample tabletting system are controlled through electric signals, so that ignition combustion in three forms of single particle, powder and block of a sample is realized, continuous experiments can be carried out, the combustion process can be visualized through the transparent quartz cover, and data acquisition of the combustion data acquisition system is facilitated.

This invention provides a quantitative evaluation method for the premixed combustion ratio of a dual-fuel engine, belonging to the field of internal combustion engine combustion analysis technology. The method includes: constructing a simulation model of the engine's in-cylinder working process; classifying zero-carbon fuel jets based on spatial symmetry; extracting the time-varying curve of the "flame-like volume" within the combustion region corresponding to each type of jet; determining the ignition time of each type of jet based on the curve; calculating the mass of zero-carbon fuel injected before ignition based on the ignition time and injection rate curve; and finally summarizing and calculating the proportion of premixed fuel mass to the total injection mass to obtain the premixed combustion ratio. This invention, employing the aforementioned quantitative evaluation method for the premixed combustion ratio of a dual-fuel engine, achieves for the first time an accurate and quantitative evaluation of the premixed combustion ratio under asymmetric ignition conditions. The evaluation results have clear physical meaning, providing crucial data support for optimizing the combustion mode and performance of dual-fuel engines.

The present invention discloses a simulation method for post-combustion effect introducing chemical reaction analysis, including: obtaining detonation energy, detonation products, mass fraction, and relevant thermodynamic parameters according to the detonation process of explosives; obtaining energy release parameters including chemical reaction source terms; establishing a post-combustion analysis calculation model for enclosed space explosion introducing chemical reaction source terms; solving the initial temperature and initial pressure of the equivalent gas mass of explosives; inputting relevant parameters into the post-combustion analysis calculation model for enclosed space explosion introducing chemical reaction to solve and obtain the energy release rate; calculating the specific heat energy of the post-combustion effect, modifying the JWL equation of state, and simulating the internal explosion response in the enclosed space considering the post-combustion effect. The beneficial effects of the present invention are: introducing a calculation model including chemical reaction source terms can accurately and effectively simulate the explosive initiation process, obtain the start and end times of the post-combustion reaction and the energy release rate, and the simulation results are accurate.

Embodiments of the present disclosure disclose a method, device, storage medium, and electronic device for determining engine characteristics. Among them, the determination method includes: determining the indicated torque of the engine based on the gear position and the engine speed; determining the engine loss torque based on the engine speed; and determining the engine characteristics of the engine based on the indicated torque and the engine loss torque, where the engine characteristics at least include the external characteristic torque of the engine and / or the transmission efficiency of the transmission system. Embodiments of the present disclosure, based on the state of the whole vehicle, obtain the external characteristic parameters of the engine through devices such as cylinder pressure sensors and combustion analyzers, and in combination with chassis dynamometer tests; obtain the transmission efficiency of the transmission system based on the engine output power and the chassis dynamometer wheel side test power, overcome the influence of environmental parameters on the results, and the obtained results are more accurate, providing an effective reference boundary for the power matching of the engine.

A method for detecting a top dead center of a machine in an engine delivery cold test belongs to the technical field of engine cold tests, and is characterized by comprising the following steps: installing a cylinder pressure sensor on a cylinder 1, installing a pressure sensor at the position of the cylinder 1 of a cylinder cover air inlet channel, and installing an external signal amplifier; the method comprises the following steps: calibrating a top dead center, controlling a test bench, performing waveform test, and outputting an oscillogram; a heat loss angle is measured, a one-cylinder top dead center sensor is installed on an engine body, the sensor and a crankshaft position sensor are connected into a combustion analyzer, and a physical top dead center is measured through turning; calculating the position of a top dead center; a pressure sensor is additionally arranged at an air inlet cover plate of the short-engine cold test bench, and the engine tested by the test bench is loaded to the cold test bench; carrying out data statistics, and carrying out statistics on factory machine samples; after the limit value setting is completed, arranging workshop implementation and management and control; the quality of the outgoing engine is improved, the service life of the engine is prolonged, the overall oil consumption level of the outgoing engine is controlled, and customer experience is further improved.

An analytical device and a method for analyzing, in particular combustion analysis, a sample are proposed. According to a first aspect, a gas flow sensor of the analysis device is arranged downstream of an analyte detector of the analysis device or a gas flow measurement is carried out downstream of a detection of an analyte. According to a further aspect, the analysis device has a reference detector arranged serially to the analyte detector and / or upstream of the analyte detector for carrying out a reference measurement, or a gas with which a reference measurement is carried out is used as a carrier gas for transporting the analyte through an analysis channel of the analysis device after the reference measurement has been carried out.