An igniter test system for multi-comprehensive environmental simulation of gas turbine combustors

Abstract

The purpose of the present invention is to provide an igniter test system for multi-comprehensive environment simulation of a gas turbine combustion chamber, comprising a multi-comprehensive environment control system, a multi-comprehensive igniter test environment, and a data acquisition system; the multi-comprehensive environment control system includes a fuel system, an intake and exhaust system, and a temperature and humidity control system; the multi-comprehensive igniter test environment provides an igniter installation interface, a fuel nozzle interface, an incoming air interface, and an exhaust interface; the data acquisition system includes macro-parameter monitoring and micro-parameter monitoring. The present invention provides a variety of different simulated real combustion chamber environments, with a wider range of adjustable parameters, covering a wider range of ignition environments; compared to using a gas turbine to test the igniter, the present invention greatly reduces costs and more effectively creates a more extreme environment; the present invention reserves an igniter interface, and the incident air angle, fuel state, and angle inside the device are all adjustable, and parameters can be adjusted according to actual gas turbine requirements.

Description

Technical Field

[0001] The present invention relates to an igniter test system, in particular to a gas turbine combustion chamber igniter test system. Background Art

[0002] Due to their unique structural characteristics, gas turbines offer excellent properties such as high efficiency, high power, low emissions, compact size, and light weight. They are currently widely used in a variety of applications, including shipping, power generation, and natural gas transportation. However, technological advancements are placing new demands on gas turbine parameters, such as ensuring smooth ignition and start-up under varying operating environments and fuel conditions. However, with the ever-changing operating environment, ignition failure has become a significant cause of gas turbine start-up failures. Therefore, it is necessary to design a comprehensive multi-environment ignition test device to more realistically simulate the ignition environment created by a gas turbine combustor, allowing for the conduct of ignition testing, data measurement, and control algorithm optimization experiments within this environment. Summary of the Invention

[0003] The purpose of the present invention is to provide an igniter test system for multi-comprehensive environmental simulation of a gas turbine combustion chamber that can provide different fuel types and characteristics, different air temperature, pressure, humidity and other parameters, as well as provide multiple monitoring devices, which can be used to conduct ignition test research on gas turbine igniters in different environments and further evaluate ignition performance.

[0004] The object of the present invention is achieved like this:

[0005] The present invention provides an igniter test system for multi-integrated environment simulation of a gas turbine combustion chamber, which is characterized by comprising a multi-integrated environment control system, a multi-integrated igniter test environment, and a data acquisition system;

[0006] The multi-integrated environmental control system includes a fuel system, an intake and exhaust system, and a temperature and humidity control system. The fuel system is used to provide fuels of different temperatures and calorific values. The intake and exhaust system includes an intake system and an exhaust system. The intake system works in conjunction with the temperature and humidity control system to provide air of different temperatures, humidity, and pressures.

[0007] The multi-integrated igniter test environment provides an igniter installation interface, a fuel nozzle interface, an incoming air interface, and an exhaust interface. The igniter is installed on the igniter installation interface; the incoming air interface and the fuel nozzle interface are installed on one side of the igniter installation interface to achieve mixing of air and fuel and provide a combustible gas environment; a temperature sensor and a pressure sensor are installed in front of the incoming air interface and the fuel nozzle interface, and a humidity sensor is installed in front of the incoming air interface. The exhaust interface is installed on the side opposite to the incoming air interface to discharge the exhaust gas after combustion. The exhaust interface is installed with a temperature sensor, a pressure sensor and an environmental monitoring sensor to judge whether the combustion is sufficient and the combustion status;

[0008] The data acquisition system includes macro-parameter monitoring and micro-parameter monitoring. Macro-parameter monitoring includes temperature sensors, humidity sensors, pressure sensors, and high-speed image acquisition devices. The temperature sensors, humidity sensors, and pressure sensors monitor the parameters of the inlet air end, fuel end, multi-integrated environmental chamber and exhaust end. The high-speed image acquisition device records the combustion status of the fuel before ignition, at the moment of ignition, and after ignition; micro-parameter monitoring includes a probe system, which monitors the electron temperature, electron density, and ion temperature parameters during fuel combustion to judge the quality of combustion performance.

[0009] The present invention may also include:

[0010] 1. The intake and exhaust system controls the initial air pressure in the chamber, which is adjustable from 0.1MPa to 0.5MPa.

[0011] 2. The probe system includes a signal generator, a power amplifier module, a signal sampling circuit, a probe body, a signal conditioning circuit, and an optoelectronic isolation module. The signal generator generates a scanning voltage of -20 to +20V, and the power amplifier module generates a scanning voltage of at least -150 to +150V, which is applied to the probe body. Under the action of the scanning voltage, the electrons in the burning state are affected by the scanning voltage and move away from or adsorbed on the probe surface, causing an induced current to be generated in the probe circuit. A signal sampling circuit is added between the power amplifier module and the probe body, that is, a metal resistor is connected in series in the circuit. By collecting the voltage across the metal resistor, the current in the probe circuit is calculated according to I = (V1-V2) / R, and the electrical signal enters the control system through the signal conditioning circuit and the optoelectronic isolation module.

[0012] 3. The probe body is mounted on a three-dimensional motion platform driven by electrodes, covering any position in the chamber.

[0013] 4. The probe head is made of high temperature resistant tungsten rod with a diameter of 0.5-1.5mm and a length of 1-2mm.

[0014] The advantages of the present invention are:

[0015] 1. The present invention provides a variety of different simulated real combustion chamber environments, and the chamber environment can be coordinated and controlled, with a wider range of adjustable parameters, covering more ignition environments;

[0016] 2. Compared with using a gas turbine to test the igniter, the present invention greatly reduces costs and more effectively creates a more extreme environment;

[0017] 3. The present invention reserves an igniter interface. The incident air angle, fuel state and angle inside the device are all adjustable. The parameters can be adjusted according to the actual gas turbine requirements and a test environment can be provided for newly developed igniters. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a principle structure diagram of the present invention;

[0019] Figure 2 This is a principle block diagram of the probe system of the present invention. DETAILED DESCRIPTION

[0020] The present invention will be described in more detail below with reference to the accompanying drawings:

[0021] Combine Figure 1-2 An igniter test device for multi-integrated environment simulation of a gas turbine combustion chamber includes a multi-integrated igniter test environment, an igniter installation interface, a multi-integrated environment control system, a data acquisition system and a control system.

[0022] The multi-integrated environmental control system includes a fuel system, an intake and exhaust system, and a temperature and humidity control system. The fuel system provides fuels of varying types (oil, natural gas), temperatures, and calorific values. The intake and exhaust system includes both an intake and exhaust system. The intake system works in conjunction with the temperature and humidity control system to provide air at varying temperatures, humidities, and pressures. The fuel can also be heated by a heater to meet test conditions.

[0023] The multi-comprehensive igniter test environment provides an igniter installation interface, a fuel nozzle interface, an incoming air interface, an exhaust interface, and a parameter monitoring interface. The igniter installation interface is used to install different types of igniters, such as plasma igniters and spark igniters. The incoming air interface and fuel interface are installed on one side of the igniter interface to achieve sufficient mixing of air and fuel and provide a combustible gas environment. Temperature sensors and pressure sensors are installed in front of the air interface and fuel interface. In addition, a humidity sensor is installed in front of the air interface. The exhaust interface is installed on the side opposite to the air inlet and is used to discharge the exhaust gas after combustion. The exhaust outlet is equipped with a temperature sensor, pressure sensor, and environmental monitoring sensor to determine whether the combustion is complete and the combustion status.

[0024] The data acquisition system includes both macro- and micro-parameter monitoring. Macro-parameter monitoring includes temperature sensors, humidity sensors, pressure sensors, and a high-speed image acquisition device. These sensors are used to monitor parameters at the inlet air, fuel, multi-environmental chamber, and exhaust. The high-speed image acquisition device records the combustion state of the fuel before, at the moment of ignition, and after ignition. Micro-parameter monitoring includes a probe system that monitors parameters such as electron temperature, electron density, and ion temperature during fuel combustion to determine combustion performance.

[0025] The temperature sensor used to measure the air temperature is a PT100 thermal resistor with a range of -50 to 200°C.

[0026] The temperature sensor used to measure the fuel temperature is a PT100 thermal resistor with a range of -50 to 200°C.

[0027] The temperature sensor used to measure the fuel combustion temperature in the chamber is a thermocouple with a range of 0 to 1000°C;

[0028] The pressure sensor used to measure the inlet air pressure has a range of 0-8MPa;

[0029] The pressure sensor used to measure fuel or natural gas pressure has a range of 0-4MPa;

[0030] The pressure sensor used to measure the pressure in the chamber has a range of 0-8MPa;

[0031] The pressure sensor used to measure exhaust pressure has a range of 0-4MPa;

[0032] The high-speed image acquisition device uses a high-speed ICCD camera, which can achieve full coverage of the ignition point.

[0033] The air intake system and the exhaust system can control the initial air pressure in the chamber, which is adjustable within the range of 0.1MPa-0.5MPa.

[0034] The control system is a PLC system composed of a CPU, an IO acquisition module, and an isolation element, and internally integrates three parts: a probe control and data acquisition and processing module, an igniter control module, and a multi-integrated environmental control module.

[0035] The probe system includes a signal generator, a power amplifier module, a signal sampling circuit, a probe body, a filter module, a signal conditioning module, and an optoelectronic isolation module. The signal generator can generate a scanning voltage of -20 to +20V. Through the action of the power amplifier module, a scanning voltage of -150 to +150V is generated and applied to the probe body. A metal resistor R = 100Ω is selected in the signal sampling circuit. By collecting the voltages V1 and V2 across the metal resistor, the current in the probe circuit is calculated according to I = (V1-V2) / R. The electrical signal then enters the control system through the signal conditioning circuit and optoelectronic isolation module.

[0036] The probe head is made of a high-temperature resistant tungsten rod with a diameter of 1mm and a length of 1mm. The probe body is mounted on a three-dimensional motion platform driven by electrodes, allowing it to cover any position within the chamber.

[0037] The probe control module in the control system primarily performs the following functions: 1) regulating the voltage amplitude and frequency generated by the signal generator; 2) calculating the VI characteristic curve within the probe circuit, as well as parameters such as electron density and electron temperature, which are closely related to combustion performance; and 3) controlling the motion of the three-dimensional platform that carries the probe. The data acquisition module collects parameters such as temperature, humidity, and pressure at a rate exceeding 500 kS / s. The igniter control module is responsible for controlling the igniter power supply and ignition frequency. The multi-comprehensive environmental control module regulates the temperature and humidity of the air and fuel to create different ignition environments.

Claims

1. An igniter test system for multi-comprehensive environmental simulation of a gas turbine combustor, characterized by: Including multiple Integrated environmental control system, multi-integrated igniter test environment, data acquisition system; The multi-integrated environmental control system includes a fuel system, an intake and exhaust system, and a temperature and humidity control system. The fuel system is used to provide fuels of different temperatures and calorific values. The intake and exhaust system includes an intake system and an exhaust system. The intake system works in conjunction with the temperature and humidity control system to provide air of different temperatures, humidity, and pressures. The multi-integrated igniter test environment provides an igniter installation interface, a fuel nozzle interface, an incoming air interface, and an exhaust interface. The igniter is installed on the igniter installation interface; the incoming air interface and the fuel nozzle interface are installed on one side of the igniter installation interface to achieve mixing of air and fuel and provide a combustible gas environment; a temperature sensor and a pressure sensor are installed in front of the incoming air interface and the fuel nozzle interface, and a humidity sensor is installed in front of the incoming air interface. The exhaust interface is installed on the side opposite to the incoming air interface to discharge the exhaust gas after combustion. The exhaust interface is installed with a temperature sensor, a pressure sensor and an environmental monitoring sensor to judge whether the combustion is sufficient and the combustion status; The data acquisition system includes macro-parameter monitoring and micro-parameter monitoring. Macro-parameter monitoring includes temperature sensors, humidity sensors, pressure sensors, and high-speed image acquisition devices. The temperature sensors, humidity sensors, and pressure sensors monitor the parameters of the inlet air end, fuel end, multi-integrated environmental chamber and exhaust end. The high-speed image acquisition device records the combustion status of the fuel before ignition, at the moment of ignition, and after ignition; micro-parameter monitoring includes a probe system, which monitors the electron temperature, electron density, and ion temperature parameters during fuel combustion to judge the quality of combustion performance.

2. The igniter test system for multi-comprehensive environment simulation of a gas turbine combustor according to claim 1, characterized in that: The intake and exhaust system controls the initial air pressure in the chamber, which is adjustable from 0.1MPa to 0.5MPa.

3. The igniter test system for multi-comprehensive environment simulation of a gas turbine combustor according to claim 1, characterized in that: The probe system includes a signal generator, a power amplifier module, a signal sampling circuit, a probe body, a signal conditioning circuit, and a photoelectric isolation module. The signal generator generates a scanning voltage of -20 to +20V, which is applied to the probe body through the power amplifier module to generate a scanning voltage of at least -150 to +150V. Under the action of the scanning voltage, electrons in a burning state are moved away from or adsorbed on the probe surface by the scanning voltage, causing an induced current to be generated in the probe circuit. A signal sampling circuit is added between the power amplifier module and the probe body, that is, a metal resistor is connected in series in the circuit. By collecting the voltage across the metal resistor, the current in the probe circuit is calculated according to I = (V1-V2) / R, and the electrical signal enters the control system through the signal conditioning circuit and the photoelectric isolation module.

4. The igniter test system for multi-comprehensive environment simulation of a gas turbine combustor according to claim 3, characterized in that: The probe body is mounted on a three-dimensional motion platform driven by electrodes, covering any position in the chamber.

5. The igniter test system for multi-comprehensive environment simulation of a gas turbine combustor according to claim 3, characterized in that: The probe head is made of high temperature resistant tungsten rod with a diameter of 0.5-1.5mm and a length of 1-2mm.

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