Total temperature probe head with wide insensitive angle based on thermal resistor

Abstract

The invention discloses a total temperature probe head with a wide insensitive angle based on a thermal resistor. The total temperature probe head is characterized in that the total temperature probehead is composed of the thermal resistor (2), a stagnation cover (3) and a heat insulation layer (4); the thermal resistor (2) is a temperature sensing element; the root of the thermal resistor (2) iscovered with the heat insulation layer (4); an air inlet hole (31) is formed in the front end of the stagnation cover (3), and a chamfer (33) is machined at an opening of the air inlet hole (31); a plurality of expanding-type air inlet grooves (1) are formed in the different circumferential positions of the front end of the stagnation cover (3); and an air outlet hole (32) is formed in the tail end of the stagnation cover (3). According to the total temperature probe head, the insensitive angle range of a total temperature probe to the incoming flow direction can be effectively expanded, andmeanwhile, the measurement accuracy of the total temperature can be improved.

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...

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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

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