Continuous wind tunnel airflow temperature cooling method

Abstract

The invention belongs to the technical field of high-speed wind tunnel test equipment, and discloses a continuous wind tunnel airflow temperature cooling method. The cooling method comprises the following steps: opening the heat exchange equipment; a circulating water system is started, and an open water way and a closed water way are started in sequence; starting the continuous wind tunnel; the hot air flow and the cold air flow circulate in the tunnel body loop, and a wind tunnel test is carried out; and after the wind tunnel test is finished, sequentially closing the circulating water system and the heat exchange equipment. According to the cooling method, an open water way and a closed water way are combined, so that the cooling requirement of a narrow water flow channel can be met, and the construction, operation and maintenance cost can be reduced; and the comprehensive requirements of high power, wide working condition and high precision of the continuous wind tunnel can be met. And a reference scheme can be provided for airflow cooling of similar backflow type experimental equipment, and the device can be popularized and applied to the technical field of cooling and temperature adjustment of high-temperature air in a backflow shell.

Description

technical field [0001] The invention belongs to the technical field of high-speed wind tunnel test equipment, and in particular relates to a continuous wind tunnel airflow temperature cooling method. Background technique [0002] A continuous wind tunnel is a backflow wind tunnel, which is mainly composed of a compressor, a tunnel structure, a measurement and control system, and a cooling water system. The heat energy generated by the compressor's work on the air will cause the air temperature in the wind tunnel to continue to rise. It is necessary to study scientific, reasonable and feasible airflow temperature cooling methods to avoid high-temperature air from damaging the structure of the wind tunnel and interfering with the results of the wind tunnel test. Great scientific research value and important engineering significance. [0003] The main technical difficulties faced by the cooling method include the following three aspects: first, the heat exchange in the wind tu...

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Problems solved by technology

[0003]The main technical difficulties faced by the cooling method include the following three aspects: first, the heat transfer capacity of the wind tunnel is large; The span is large, there are dozens of different working conditions, and the control is difficult; the third is high precision requirements. On the premise of meeting the ultra-large flow rate and wide working conditions, the airflow temperature fluctuation must be controlled within ±0.5°C. Precise control and regulation place extremely stringent requirements

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