Gas flow testing device for combustion chamber component of gas turbine

Abstract

The utility model aims to provide a gas flow test device for a combustion chamber component of a gas turbine, and belongs to the field of gas turbines. Comprising an air solenoid valve, a main measurement gas circuit, a first test gas circuit and a second test gas circuit, a V-shaped filter and an A-shaped filter are installed in front of the air solenoid valve, the main measurement gas circuit is connected behind the air solenoid valve, and a pneumatic control valve and a thermal resistor are sequentially installed behind the main measurement gas circuit. The first test gas circuit and the second test gas circuit are connected in parallel and are connected with the thermal resistor through the reducing tee; a first flange connecting stainless steel ball valve, a first reducing joint, an E + H mass flowmeter and a second reducing joint are sequentially mounted on the main measuring gas path, and a second flange connecting stainless steel ball valve is mounted on the main measuring gas path; a first two-block type internal thread stainless steel ball valve and a first pressure transmitter are installed on the first test gas circuit, and a second two-block type internal thread stainless steel ball valve and a second pressure transmitter are installed on the second test gas circuit. According to the utility model, the conclusion whether the combustion chamber is qualified or not is given through the air flow of the combustion chamber component.

Description

Technical Field

[0001] This utility model relates to a gas turbine testing device, specifically a combustion chamber testing device. Background Technology

[0002] Gas turbines require fuel and oxygen from a gas supply system to complete combustion and generate energy. The supply of fuel and oxygen is directly related to the gas flow rate. Therefore, gas flow control is a crucial aspect of gas turbine operation.

[0003] The gas flow rate directly affects the operation of a gas turbine; both excessively low and excessively high gas flow rates can negatively impact its performance and safety. If the gas flow rate is too low, combustion is incomplete, resulting in low efficiency and potentially producing harmful gases. It can also lead to unstable combustion and flame flashback. Conversely, if the gas flow rate is too high, the combustion temperature is too high, easily producing harmful substances such as nitrogen oxides. This also wastes fuel and reduces the turbine's lifespan. Summary of the Invention

[0004] The purpose of this invention is to provide a gas flow test device for gas turbine combustion chamber components that can reflect the air circulation capacity within the combustion chamber components of a gas turbine.

[0005] The purpose of this utility model is achieved as follows:

[0006] This utility model discloses a gas flow testing device for a gas turbine combustion chamber component, characterized by comprising an air solenoid valve, a main measuring gas path, a first test gas path, and a second test gas path. A pre-filter (V-type) and a precision oil-removing A-type filter are installed in front of the air solenoid valve. The main measuring gas path is connected after the air solenoid valve. A pneumatic regulating valve and a thermal resistor are sequentially installed after the main measuring gas path. The first and second test gas paths are connected in parallel and connected to the thermal resistor via a reducing tee. A first flange-connected stainless steel ball valve, a first reducer, an E+H mass flow meter, a second reducer, and a second flange-connected stainless steel ball valve are sequentially installed on the main measuring gas path. A first two-piece internally threaded stainless steel ball valve and a first pressure transmitter are installed on the first test gas path. A second two-piece internally threaded stainless steel ball valve and a second pressure transmitter are installed on the second test gas path.

[0007] This utility model may also include:

[0008] 1. It also includes a high-flow-rate measuring gas path, which is connected in parallel with the main measuring gas path. The high-flow-rate measuring gas path is sequentially equipped with a third flange-connected stainless steel ball valve, a third reducer, a high-flow-rate E+H mass flow meter, a fourth reducer, and a fourth flange-connected stainless steel ball valve.

[0009] The advantages of this invention are: it receives compressed air from an external air source, adjusts it via a regulating valve, and outputs clean air at a constant pressure. A mass flow meter measures the airflow through the combustion chamber components, providing a conclusion on whether the airflow is within acceptable limits. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation

[0011] The present invention will now be described in more detail with reference to the accompanying drawings:

[0012] Combination Figure 1 External air enters the equipment after passing through two filters: a pre-filter (V-type) 1 and a precision oil-removing A-type filter 2, which remove water vapor and various impurities. Air inflow and outflow are controlled by an air solenoid valve 3. The air is initially pressurized via a flanged connection to a stainless steel ball valve 4, a reducer 5, and an E+H mass flow meter 6, achieving the preset pressurization effect. The reducer 7 and flanged connection to the stainless steel ball valve 8 stabilize the airflow after the initial pressurization, transforming the air source into a stable flow. The initial airflow rate is then adjusted via a Baode pneumatic regulating valve 9. The compressed gas source is preheated via component 10 to meet test requirements. The gas source pressure is regulated via armored thermal resistor 11, and pressure rise is achieved by reducing concurrent flow. After passing through the armored thermal resistor 11, the gas source undergoes a first and second split for a dual-path test. Both the two-piece internal thread stainless steel ball valves 12 and 13 are stainless steel ball valves, and the test flow rate is controlled according to different opening degrees. Pressure transmitter 14 is located downstream of the two-piece internal thread stainless steel ball valves 12 and 13. The gas path containing flange-connected stainless steel ball valve 19, reducer 18, high-flow E+H mass flow meter 17, reducer 16, and flange-connected stainless steel ball valve 15 is a high-flow measurement gas path, serving as a reserved area.

[0013] This invention supports the detection of the effective area of ​​the flow channel, simplification of mass flow, flow function, influence of the flow function on surrounding environmental conditions, correction of mass flow rate, and pressure ratio. Each of these items has a corresponding controlled variable, and the status of the item is detected through the measurement feedback of the controlled variable.

[0014]

[0015]

[0016] Mass flow rate through a critical flow Venturi nozzle:

[0017] W = P * A * C * *C d √gc / R*T Unit: kg / s W is mass flow rate, P is the absolute pressure of the gas entering the critical flow venturi nozzle inlet, A is the sonic nozzle throat area, C * Let g be the critical flow function. c R is the outflow coefficient, T is the flow gas constant, and T is the absolute temperature of the gas entering the inlet of the critical flow Venturi nozzle.

[0018] Airflow calculation

[0019] The specified test conditions are: blade inlet air pressure P*0 = 0.396 MPa, outlet air pressure P*0 = 0.101 MPa, and inlet air temperature T0 = 20℃. However, the test conditions specified in the design drawings could not be met during actual measurement. Therefore, it is necessary to correct the flow rate according to similarity theory while ensuring that the pressure ratio between the blade inlet and outlet is equal.

[0020] Automatic mass flow rate correction formula:

[0021]

[0022] in:

[0023]

[0024] Test bench capability

[0025] Mass flow rate range: 0.24-920 g / s;

[0026] Pressure ratio: 1.012 to 4 bar / bar;

[0027] The flow measurement accuracy is ±0.29%.

[0028] The repeatability of flow measurement is ±0.15%, 2 sigma / 20 sample average;

[0029] The flow coefficient is calibrated by 0.2% for each critical flow rate.

Claims

1. A gas flow test device for a gas turbine combustion chamber component, characterized in that: The system includes an air solenoid valve, a main measuring air path, a first test air path, and a second test air path. A pre-filter (V-type) and a precision oil-removing A-type filter are installed in front of the air solenoid valve. The main measuring air path is connected after the air solenoid valve. A pneumatic regulating valve and a thermal resistor are installed sequentially after the main measuring air path. The first and second test air paths are connected in parallel and connected to the thermal resistor via a reducing tee. A first flange-connected stainless steel ball valve, a first reducer, an E+H mass flow meter, a second reducer, and a second flange-connected stainless steel ball valve are installed sequentially on the main measuring air path. A first two-piece internally threaded stainless steel ball valve and a first pressure transmitter are installed on the first test air path. A second two-piece internally threaded stainless steel ball valve and a second pressure transmitter are installed on the second test air path.

2. The gas flow test device for a gas turbine combustion chamber component according to claim 1, characterized in that: It also includes a high-flow-rate measuring gas path, which is connected in parallel with the main measuring gas path. The high-flow-rate measuring gas path is sequentially equipped with a third flange-connected stainless steel ball valve, a third reducer, a high-flow-rate E+H mass flow meter, a fourth reducer, and a fourth flange-connected stainless steel ball valve.

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