Ten-hole total temperature measuring probe

Abstract

The invention belongs to the technical field of testing of total temperature of an aero-engine, and discloses a ten-hole total temperature measuring probe. The ten-hole total temperature measuring probe comprises a stagnation cover, a heat insulation sealing part, a probe support rod, a temperature sensor, convection heat exchange holes and a temperature measuring lead wire, wherein the stagnation cover is connected with the probe support rod, and is in an L shape; an air inlet hole with larger diameter is formed in the head part of the stagnation cover, and is provided with a chamfer to increase an insensitive angle of air flow; nine convection heat exchange holes are formed in the side wall of the stagnation cover, and are used for air flow to flow in and out; the temperature sensor can adopt various types of thermocouples or thermal resistances; the temperature measuring lead wire is led out of the back part of the probe. The ten-hole total temperature measuring probe has the advantages that the air intake amount is larger; the heat exchange at the surface of the temperature sensor is quick, the insensitive angle range of the air flow is large, the total temperature of a flow field with larger air flow deflection angle and larger working condition change can be measured, and the total temperature of the flow field can be measured at low speed.

Description

technical field [0001] The invention belongs to the technical field of total temperature testing of aero-engines, relates to a total temperature measuring device of a flow field, and in particular to a ten-hole total temperature measuring probe. Background technique [0002] In the engine performance test, it is necessary to use different types of total temperature probes to measure the total temperature of the engine flow field. The existing total temperature probe has a small amount of air in and out, large thermal inertia, the temperature measurement part cannot fully stagnate the incoming flow, the heat exchange on the surface of the temperature sensor is insufficient, and the airflow insensitivity angle range is small, and it is easy to produce measurement errors during the measurement process. It is difficult to accurately measure the total temperature of the flow field of an aero-engine, especially at low speeds. The traditional total temperature probe has a small air...

AI Technical Summary

Problems solved by technology

The existing total temperature probe has a small amount of air in and out, large thermal inertia, the temperature measurement part cannot fully stagnate the incoming flow, the heat exchange on the surface of the temperature sensor is insufficient, and the airflow insensitivity angle range is small, and it is easy to produce measurement errors during the measurement process. It is difficult to accurately measure the total temperature of the flow field of an aero-engine, especially at low speeds. The traditional total temperature probe has a small air intake and cannot accurately measure the total temperature of the flow field.

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