Dual-mode feeding structure and model thermal assessment method based on same

Abstract

The invention relates to a dual-mode feeding structure and a model thermal assessment method based on the same. The dual-mode feeding structure comprises a guide strip, a dual-mode support, an electric guide rail, a controller and a fixed support. The dual-mode support is a support which is provided with two mounting holes and can be used for cooling water, the bottom end of the dual-mode supportis connected with the electric guide rail, and the dual-mode support can reciprocate under the action of the electric guide rail. The top of the fixed support is connected with the electric guide rail. The controller controls the electric guide rail to move, and manual control and automatic operation according to a preset motion scheme can be carried out. One end of the guide strip is fixed at theoutlet of an arc wind tunnel, and the other end is connected with the dual-mode support through grooves. Based on the structure, the invention further provides a model thermal assessment method. Thedual-mode feeding structure and the model thermal assessment method can be applied to high-precision measurement requirements in aerodynamic heat ground simulation tests of thermal insulation materials of high-speed aircrafts.

Description

technical field [0001] The invention relates to a dual-mode feeding structure and a model thermal assessment method based on the structure, which are applied to the ground assessment test of thermal protection materials for aerospace vehicles. Background technique [0002] When the thermal protection ground simulation test is carried out for the heat-resistant material of the high-speed aircraft, the arc is usually used to heat the air in the arc wind tunnel to form a high-temperature and high-speed airflow to flow over the surface of the heat-resistant material to achieve the purpose of heating assessment. [0003] During the operation of the arc wind tunnel, due to the slow ablation of the electrodes and the long balance time of the heat exchange of the cooling equipment, there are certain fluctuations in the parameters of the high-temperature and high-speed airflow obtained under the same input conditions during multiple tests, but because the main index parameters fluctua...

AI Technical Summary

Problems solved by technology

[0003] During the operation of the arc wind tunnel, due to the slow ablation of the electrodes and the long balance time of the heat exchange of the cooling equipment, there are certain fluctuations in the parameters of the high-temperature and high-speed airflow obtained under the same input conditions during multiple tests, but because the main index parameters fluctuate generally No more than ±5%, which can meet the assessment requirements of conventional heat-resistant materials, but for the fine comparison test of materials with similar structures, the fluctuation range of the main parameters of the arc wind tunnel cannot meet the requirements

Images