A system and method for calibrating electric spark ignition energy under high pressure

An ignition energy and calibration system technology, which is applied in the field of spark ignition energy calibration systems and methods under high pressure, can solve the problems of difficulty in quantitative research on the ignition characteristics of combustible premixed gas, inability to obtain the exact energy of the spark, and eliminate heat loss. Effects of interference, reduced heat loss, and improved accuracy

Inactive Publication Date: 2017-05-24
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the current various devices for measuring the minimum ignition energy of combustible premixed gas, the spark ignition voltage is generally used to estimate the ignition energy of the spark, and the exact energy actually produced by the spark cannot be obtained, which limits the ignition characteristics of the combustible premixed gas. Quantitative research poses great difficulties
[0003] At present, there is no relevant device at home and abroad that can accurately measure and calibrate the spark ignition energy

Method used

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  • A system and method for calibrating electric spark ignition energy under high pressure
  • A system and method for calibrating electric spark ignition energy under high pressure
  • A system and method for calibrating electric spark ignition energy under high pressure

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0033] Specific implementation mode 1: When the electric spark electrode and the heating resistance wire are arranged symmetrically in the high-pressure adiabatic chamber,

[0034] Fill the adiabatic cavity with compressed air to make the pressure reach 10 atmospheres. Adjust the voltage of the high-voltage pulse ignition device to 60kV, and set the spark generation frequency to 10Hz (that is, 10 times per second). Record the reading of the sensitive thermocouple display meter T 1 =25°C, turn on the high-voltage pulse ignition device, start to generate constant frequency electric sparks, and start timing at the same time. Turn off the high-voltage pulse ignition device after timing for 100 seconds, and record the reading T of the thermocouple display meter 2 = 45°C.

[0035] Wait until the cavity returns to normal temperature (the thermocouple reading is 25° C.), and then fill the adiabatic cavity with compressed air at a pressure of 10 atmospheres again. Set the controlle...

specific Embodiment approach 2

[0037] Specific implementation mode 2: When the electric spark electrode and the heating resistance wire are arranged alternately in the high-pressure heat-insulating cavity

[0038] Fill the adiabatic cavity with compressed air to make the pressure reach 10 atmospheres. Adjust the voltage of the high-voltage pulse ignition device to 60kV, and set the spark generation frequency to 10Hz (that is, 10 times per second). Record the reading of the sensitive thermocouple display meter T 1 =25°C, turn on the high-voltage pulse ignition device, start to generate constant frequency electric sparks, and start timing at the same time. Turn off the high-voltage pulse ignition device after timing for 100 seconds, and record the reading T of the thermocouple display meter 2 = 45°C.

[0039] Wait until the cavity returns to normal temperature (the thermocouple reading is 25°C), remove the spark electrode, put the resistance wire in the same position, and fill the adiabatic cavity with compr...

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Abstract

The invention provides an electric spark ignition energy calibration system under high pressure and a method thereof and comprises a high pressure electric spark ignition energy calibration device and an electric spark energy measurement method. The principle is that an ignition electrode, a heating resistance wire and a sensitive thermocouple are arranged in a high pressure heat insulation cavity. Compressed air under certain pressure is inputted into the heat insulation cavity, electric sparks are uniformly and continuously generated for many times in a specific time, and the sensitive thermocouple is used to record a temperature rise curve. The air in the heat insulation cavity is released, when the cavity is restored to a normal temperature state, compressed air with the equivalent pressure is inputted again, the power of the heating resistance wire is set to be constant, and a temperature rise curve is recorded. The above step is repeated, the power of the heating resistance wire is adjusted, and the thermocouple obtains the same temperature rise curve in the same time. Through comparing the electrical spark times and heating resistance wire heating amount in the condition of same cavity, same time and same temperature rise, the energy generated in one time of electric spark is calculated. According to the device and the method, the ignition energy generated by one time of electric spark of different air pressures, different ignition voltages and different ignition electrodes can be accurately obtained, and the measurement data can be widely applied to the scientific research and production practices of the field of aerospace, energy and transport.

Description

technical field [0001] The present invention relates to a system and method for calibrating electric spark ignition energy under high pressure, in particular to a method of generating electric spark multiple times at a constant frequency to obtain a measurable significant temperature rise, and using the same device to utilize constant power within the same time The heating resistor obtains the same temperature rise, and compares and calculates the device and method for obtaining the single ignition energy of the electric spark, which is an important parameter, so as to realize the accurate measurement and calibration of the electric spark ignition energy of various electrodes under different voltages under different pressure environments. Background technique [0002] Spark ignition energy is an important parameter to measure the ignition performance of various burners and engines. Its measurement data is of great significance to aerospace, energy, and transportation, and has...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01K17/00
Inventor 李明磊吴宁
Owner TSINGHUA UNIV
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