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A total temperature probe head with wide insensitivity angle based on thermal resistance

A technology of thermal resistance and probe, which is applied to thermometers, thermometers, and measuring heat of electric/magnetic elements that are directly sensitive to heat, can solve the problems of small airflow insensitivity angle range, insufficient accuracy of total temperature measurement, etc., and achieve The effect of widening the airflow insensitive angle range

Active Publication Date: 2021-02-02
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the above-mentioned defects in the prior art, the core purpose of the present invention is to provide a total temperature probe head with a wide insensitivity angle based on thermal resistance, so as to solve the problem that the total temperature measurement accuracy is not enough in the current air flow total temperature test. , The problem of small airflow insensitivity angle range

Method used

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  • A total temperature probe head with wide insensitivity angle based on thermal resistance
  • A total temperature probe head with wide insensitivity angle based on thermal resistance
  • A total temperature probe head with wide insensitivity angle based on thermal resistance

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Embodiment 1

[0019] figure 1 , figure 2 , image 3 It is a structural schematic diagram of Embodiment 1 of the present invention, a total temperature probe head with a wide insensitivity angle based on a thermal resistor, characterized in that it consists of a thermal resistor (2), a stagnation cover (3) and a thermal insulation layer ( 4) Composition; the thermal resistor (2) is a temperature sensing element; the root of the thermal resistor (2) is covered with an insulating layer (4); the front end of the stagnation cover (3) is provided with an air inlet (31), and the inlet of the air inlet (31) There are chamfers (33) processed; four expansion air inlet slots (1) are provided at different circumferential positions at the front end of the stagnation cover (3); and three air outlet holes (32) are provided at the rear end of the stagnation cover (3).

[0020] The expansion angle of the air inlet slot (1) is 25°.

[0021] The length of the air inlet groove (1) is 4 times the length of ...

Embodiment 2

[0025] Figure 4 It is a structural schematic diagram of Embodiment 2 of the present invention, a total temperature probe head with a wide insensitivity angle based on a thermal resistor, characterized in that it consists of a thermal resistor (2), a stagnation cover (3) and a thermal insulation layer ( 4) Composition; the thermal resistor (2) is a temperature sensing element; the root of the thermal resistor (2) is covered with an insulating layer (4); the front end of the stagnation cover (3) is provided with an air inlet (31), and the inlet of the air inlet (31) There are chamfers (33) processed; eight expansion air inlet slots (1) are provided at different circumferential positions at the front end of the stagnation cover (3); and three air outlet holes (32) are provided at the rear end of the stagnation cover (3).

[0026] The expansion angle of the air inlet slot (1) is 25°.

[0027] The length of the air inlet groove (1) is 4 times the length of the thermal resistor (2...

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Abstract

The invention discloses a total temperature probe head with a wide insensitivity angle based on a thermal resistance, which is characterized in that it consists of a thermal resistance (2), a stagnation cover (3) and a heat insulating layer (4); the thermal resistance (2) is a temperature sensing element; the root of the thermal resistance (2) is covered with an insulating layer (4); the front end of the stagnation cover (3) is provided with an air inlet (31), and the mouth of the air inlet (31) is processed with a chamfer (33 ); the front end of the stagnation cover (3) is provided with a plurality of expansion air intake slots (1) at different circumferential positions; the rear end of the stagnation cover (3) is provided with air outlet holes (32). The invention can effectively increase the insensitive angle range of the total temperature probe to the incoming flow direction, and simultaneously improve the measurement accuracy of the total temperature.

Description

technical field [0001] The invention relates to the technical field of total temperature measurement, in particular to a thermal resistance-based total temperature probe head with a wide insensitivity angle. Background technique [0002] In the field of temperature measurement of gas turbines and aeroengines, the measurement of airflow temperature is generally the measurement of the total airflow temperature, that is, the temperature that the airflow can reach under the state of adiabatic stagnation. In the actual measurement process, it is difficult to achieve complete adiabatic stagnation, and the velocity error is relatively large when measuring the total temperature of high-speed airflow. Therefore, the temperature measured by the temperature measuring probe is usually less than the total temperature of the airflow. [0003] Existing total temperature probes mostly use thermocouples as temperature sensing elements, and the structure of the probe head usually uses a stag...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01K7/16
CPCG01K7/16
Inventor 马宏伟施磊
Owner BEIHANG UNIV
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