Total temperature probe with closely neighboring double-hole

Abstract

The invention belongs to the technical field of total temperature test, and discloses a total temperature probe with closely neighboring double-hole. The total temperature probe with closely neighboring double-hole includes a stagnation cover, convection heat exchange holes, a temperature sensor, a probe pole, a heat insulation sealing member, a heat insulation seal cover and a temperature measurement lead wire, wherein two convection heat exchange holes are formed in the stagnation cover in the axial direction; compared with a traditional total temperature probe, the convection heat exchange holes have greater aperture; the temperature sensor can be various types of thermocouple or thermal resistor, and the axial direction of the temperature measurement terminal is corresponding to the first convection heat exchange hole in the axial direction of the stagnation cover; the probe pole is L-shaped or a straight pole type; the heat insulation seal cover can be opened, thus being convenient for exchanging the temperature sensor; the temperature measurement lead wire can be led out from the tail of the probe pole; and the probe structure is suitable for measuring the total temperature of the outlet flow field of a centrifugal compressor, and can measure the total temperature of a flow field at the outlet of a rotor of the centrifugal compressor, wherein the gap among the blade rows is small and the inflow speed is relatively lower. The total temperature probe with closely neighboring double-hole has the advantages of being simple in structure, being small in the size of the head of the temperature measurement part, and realizing adequate heat exchange at the surface of the temperature sensor in the low speed condition.

Description

technical field [0001] The invention belongs to the technical field of flow field total temperature testing, and particularly relates to a total temperature probe with two holes in close proximity. Background technique [0002] Under various total temperature test conditions, different types of total temperature probes are required to measure the total temperature of the flow field. The key to accurately measure the total temperature of the airflow is whether the airflow can be quickly stagnant at the temperature measurement point, and the gas in the stagnation cover can be rapidly exchanged. [0003] Most of the existing total temperature probes are air intake in the front hole, holes on both sides or exhaust in the rear hole. The disadvantage is that the axial size is large. When the airflow speed is low, the rapid heat exchange on the surface of the temperature sensor cannot be guaranteed. The temperature measurement error is large. The porous temperature probe has a co...

AI Technical Summary

Problems solved by technology

To measure the total temperature of the airflow at the outlet of the rotor of the centrifugal compressor, due to the small gap between the blades, the axial size of the total temperature probe is required to be small. The existing total temperature probe has a complex structure and a large size, which cannot meet the requirements well

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