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A method for temperature testing of airflow field gas mixed with liquid

An airflow field and liquid technology, which is applied in the field of aero-engine temperature field testing, can solve problems such as inability to accurately calculate the strength, affect the test circuit, and complex waterproof structure, and achieve stable data without abnormalities, more stress concentration points, and expand the range of test sections Effect

Active Publication Date: 2019-05-24
AECC SHENYANG ENGINE RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the measured medium is mixed with liquid, the traditional temperature probe facing the airflow test method faces the following problems: the liquid adheres to the surface of the probe, causing a short circuit between the probe and the housing, which in turn affects the test circuit. This effect is Significant and fatal; excessive liquid builds up to form a liquid film that coats the surface of the probe, isolating the measured gas flow from the probe, causing the temperature sensed by the probe to be the temperature of the liquid film rather than the temperature of the gas
The waterproof structure of the special waterproof temperature probe is complicated, and there are many positions that need to be welded, and the strength of the welded positions is often weak, and the strength cannot be accurately calculated due to the influence of construction, so it cannot be used in risky sections, such as the section before the engine inlet

Method used

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  • A method for temperature testing of airflow field gas mixed with liquid
  • A method for temperature testing of airflow field gas mixed with liquid
  • A method for temperature testing of airflow field gas mixed with liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Example 1: figure 1 It is a schematic flow chart of a method for testing the temperature of gas mixed with liquid in an airflow field according to an embodiment of the present invention. figure 2 It is a structural schematic diagram of the test section of the method for testing the temperature of gas mixed with liquid in the airflow field according to the first embodiment of the present invention. image 3 yes figure 2 Schematic diagram of the distribution of temperature probes in the shown method for temperature testing of airflow field gas mixed with liquid. Figure 4 yes figure 2 Plot of the linear fit of the temperature probe in the shown method for temperature testing of flow field gases mixed with liquids. Figure 5 yes figure 2 Plot of the quadratic polynomial fit curve for the temperature probe in the shown method for temperature testing of flow field gas mixed with liquid.

Embodiment approach

[0056] Step 1: On-site calibration of the temperature probe before the test. Specifically, step 11: under the condition that no liquid is sprayed, select temperature gradient points within the temperature range of the measured section. Because the temperature range of the measured section is 60°C-140°C, the temperature gradient points are selected at intervals of 20°C, which are 60°C, 80°C, 100°C, 120°C, and 140°C.

[0057] Step 12: In this embodiment, select half of the number of temperature probes at equal angular intervals to make the direction of the temperature probes face away from the air flow. In this example, select probes 2, 4, 6, and 8 to rotate so that Its back faces the airflow, and this part of the temperature probe is denoted as A for the convenience of description. Select No. 1, 3, 5, and 7 probe temperature probes to face the airflow and record it as B. Set the temperature gradient point as the target value of the average temperature of the B measuring point...

Embodiment 2

[0069] Example 2: Figure 6 It is a structural schematic diagram of the test section of the method for testing the temperature of gas mixed with liquid in the airflow field according to the second embodiment of the present invention. Figure 7 yes Figure 6 Schematic diagram of the distribution of temperature probes in the shown method for temperature testing of airflow field gas mixed with liquid. Figure 8 yes Figure 6 Plot of the linear fit of the temperature probe in the shown method for temperature testing of flow field gases mixed with liquids.

[0070] For the case where the number of temperature probes of the tested section is odd or 4 or less (including 4), for example, 3 temperature probes, the measured temperature range is 60°C-140°C, and the test section is as follows: Figure 6 As shown, the probe distribution of the measured section is as follows Figure 7 shown. It is necessary to select an adjacent section as the indicator section. For the convenience of...

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Abstract

The invention discloses a method for testing the temperature of gas in an air flow field mixed with liquid. The method for temperature testing the airflow field gas mixed with liquid comprises the following steps: Step 1: Carry out on-site calibration of the temperature probe before the test; Step 2: Carry out a gas-liquid separation test during the test; Step 3: Combine the gas-liquid Separate test data for data restoration. The temperature testing method of the gas mixed with liquid in the airflow field of the present application has the following significant advantages: 1. Realizes on-site temperature calibration. 2. The test method realizes gas-liquid separation. 3. Expand the range of test sections. 4. The cost of the temperature probe is reduced and the manufacturing efficiency is high.

Description

technical field [0001] The invention relates to the technical field of aero-engine temperature field testing, in particular to a method for testing the temperature of gas in an airflow field mixed with liquid. Background technique [0002] The traditional method of testing the temperature field of an aero-engine is to test the airflow with a multi-point covered thermocouple probe. In some aero-engine tests, liquids need to be mixed in the test channels. Because the measured medium is mixed with liquid, the traditional temperature probe facing the airflow test method faces the following problems: the liquid adheres to the surface of the probe, causing a short circuit between the probe and the housing, which in turn affects the test circuit. This effect is Significant and fatal; excess liquid accumulates to form a liquid film, covering the surface of the probe, isolating the measured gas flow from the probe, causing the temperature sensed by the probe to be the temperature of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01K7/02G01K15/00G01K13/02G01K13/024
CPCG01K7/02G01K13/02G01K15/005G01K13/024
Inventor 耿欣薛秀生王晓良邹镇刘国阳
Owner AECC SHENYANG ENGINE RES INST