Hypersonic speed wind-tunnel nozzle outlet segment water cooling device

Abstract

A hypersonic speed wind-tunnel nozzle outlet segment water cooling device provided by the present invention comprises a water joint, an outer shell, an inner shell, a block and a water bar. The cooling water of the water cooling device flows in an interlayer between the outer shell and the inner shell of a nozzle outlet segment directly from the water joint outside a wind tunnel test segment, returns at the tail end of the nozzle outlet segment, and flows out from the water joint, so that the cooling water forms the circulation inside the nozzle outlet segment. According to the present invention, a water pipe does not need to be connected between the tail end of a wind tunnel nozzle segment and the wind tunnel test segment to form a water return pipe, so that the water cooling device is not correlated with the wind tunnel test segment. A wind tunnel nozzle can be replaced by just disengaging the wind tunnel nozzle from the test segment directly without needing to disassemble the water return pipe, so that the water cooling device has a very high replacement operation efficiency, and the situation that the cooling water leaks to the test segment when the wind tunnel nozzle is replaced, is avoided. Meanwhile, a cooling unit which is easy to process and is used for restraining the flow of the cooling water is arranged in the interlayer, so that the cooling water flows in the interlayer more evenly, and the nozzle outlet segment can be cooled very well.

Description

technical field [0001] The invention belongs to the technical field of conventional hypersonic wind tunnel tests, and in particular relates to a water cooling device for the exit section of a hypersonic wind tunnel nozzle. Background technique [0002] Conventional hypersonic wind tunnel nozzles are Laval nozzles, which are formally divided into constriction section, throat section, and expansion section, and structurally divided into four parts: entrance section, throat section, middle expansion section, and exit section. The exit section of the nozzle needs to be inserted into the hypersonic wind tunnel test section. During the test, the flow from the wind tunnel flows through the nozzle and flows into the test section. The total temperature of the flow from the wind tunnel is relatively high, sometimes exceeding 800°C. The test time is usually above 60s. Some tests can last up to 240s. The high-temperature airflow has a significant heating effect on the nozzle. In the abs...

AI Technical Summary

Problems solved by technology

At present, some hypersonic wind tunnel nozzle outlet sections do not have a cooling device; some hypersonic wind tunnel nozzle nozzles are welded on the nozzle outlet section and the inner wall of the test section, and connected with pipes to make a return pipe to make the cooling water A loop is formed to achieve high-eff...

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