Transient heat flow sensor

Abstract

The invention discloses a transient heat flow sensor which comprises a heat measuring probe outer shell and a heat flow sensor body, the heat flow sensor body comprises an oxygen-free copper heat transfer body, an end-exposed type armored thermocouple, and a pure silver plunger. A containing through hole is formed in the center of the oxygen-free copper heat transfer body and the inner diameter ofthe position, close to the front end of the oxygen-free copper heat transfer body, of the containing through hole is increased, and the oxygen-free copper heat transfer body is connected in the heatmeasuring probe outer shell by arranging a flange structure. The end-exposed type armored thermocouple is fixed in the containing through hole of the oxygen-free copper heat transfer body, and the temperature measuring point of the end-exposed type armored thermocouple is located in the center of the containing through hole of the oxygen-free copper heat transfer body, and the head part has a certain distance away from the outlet position of the containing through hole. The pure silver plunger is connected at the output position of the containing through hole of the oxygen-free copper heat transfer body by means of casting or fusion welding, and is integrated with the head part of the end-exposed type armored thermocouple. The transient heat flow sensor of the novel structure has the advantages of being simple in processing and assembling process, being easy to achieve quality control, and improving the heat response speed and the test accuracy of the sensor.

Description

technical field [0001] The invention belongs to the technical field of ground heat protection tests, and in particular relates to a transient heat flow sensor with a new structure. Background technique [0002] When a hypersonic vehicle flies in the atmosphere, it interacts with the surrounding air to form a high-temperature boundary layer on the surface of the vehicle, which imposes a huge aerodynamic thermal load on the structure and materials of the vehicle, seriously affecting the structural safety and life of the vehicle. In order to effectively screen, evaluate and identify heat-resistant materials and structural heat-resistant characteristics of aircraft, arc wind tunnels and arc heaters are often used as important ground simulation test platforms for aerodynamic heat and heat protection, and often need to simulate dozens of MW / m 2 Pneumatically heated environment with ultra-high heat flow. The transient heat flow measurement method in the ground heat protection test...

AI Technical Summary

Problems solved by technology

The above problems directly lead to the difficulty in controlling the processing quality of the zero-point calorimeter, slow response time and large test error (even up to 20%), which affect its effective application

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