Anti-radiation total temperature measuring probe

Abstract

The invention belongs to the technical field of total temperature testing, and discloses an anti-radiation total temperature probe which is composed of a stagnation cover, a temperature sensor, a heatinsulation sealing piece, convection heat exchange holes, a probe supporting rod, a temperature measurement lead and a shielding cover. The stagnation cover is connected with the probe supporting rodand is L-shaped. A convection heat exchange hole with a large diameter is formed in the head of the stagnation cover, and a chamfer is formed in the convection heat exchange hole and used for increasing the airflow insensitive angle. The shielding cover isolates radiation, so that the measurement result of the temperature sensor is more accurate, and the effects of preventing radiation and protecting the temperature sensor are achieved. Convection heat exchange holes are formed in the stagnation cover and the shielding cover and used for air inlet and outlet. The temperature sensor can be a thermocouple or a thermal resistor or an optical fiber sensor, and the temperature measuring lead is led out from the rear part of the probe. The probe is large in air inflow, the surface of the temperature sensor exchanges heat rapidly, the airflow insensitive angle range is large, and the total temperature of a flow field with a large airflow deflection angle and large working condition changes can be accurately measured. The probe can effectively shield radiation and protect the temperature sensor, and can accurately measure the total temperature of a flow field under a high-temperature condition.

Description

Technical field [0001] The invention belongs to the technical field of total temperature testing, and specifically relates to a radiation-proof total temperature measurement probe, which is suitable for the measurement of high-temperature flow fields. Background technique [0002] The total temperature refers to the temperature reflected when the kinetic energy of the fluid is converted into internal energy when the fluid is completely static in an adiabatic process. In the technical field of total temperature flow field testing, especially for high temperature flow field total temperature measurement, different types of total temperature probes are needed to measure the total temperature of the flow field. The traditional total temperature measuring probe has small air inlet and outlet, large thermal inertia, the temperature measurement part cannot fully stop the flow, the temperature sensor surface heat exchange is insufficient, and the airflow insensitive angle range is small....

AI Technical Summary

Problems solved by technology

The traditional total temperature measurement probe has a small amount of air in and out, large thermal inertia, the temperature measurement part cannot fully stagnate the incoming flow, the surface heat exchange of the temperature sensor is insufficient, and the airflow insensitivity angle range is small

Moreover, the temperature sensor of the traditional total temperature probe is directly installed in the stagnation cover. When the flow field temperature is high, due to the strong radiation effect of the stagnation cover and the measured object on the temperature sensor, the temperature felt by the temperature sensor The temperature is higher than that of the incoming flow, and it is easy to produce measurement errors during the measurement process. It is difficult to accurately measure the total temperature of the high-temperature flow field, and high-intensity radiation will reduce the service life of the temperature sensor.

Although the existing double-screen suction-type total temperature probe can play a role in radiation protection, it is difficult to be widely used due to its complex structure

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