Nozzle throat section water cooling structure

Abstract

The invention provides a spray pipe throat channel segment water cooling structure comprising a spray pipe internal wall, an external shell, a cooling water inlet water collection ring, a cooling water outlet water collection ring, small supports, a clamping block and a blocking circle. The clamping block is wrapped on the spray pipe internal wall. A cooling water channel is formed between the spray pipe internal wall and the clamping block. The rear end along an airflow direction of the spray pipe internal wall is connected with the external shell via the blocking circle. The cooling water inlet water collection ring and the cooling water outlet water collection ring are annular rings surrounding the external shell and are respectively configured on the front end along the airflow direction of the external shell and circumference of the external side of the rear end. The cooling water inlet water collection ring is connected with the external shell via water inlet pipes which are circumferentially and evenly distributed on the cooling water inlet water collection ring. The cooling water outlet water collection ring is connected with the external shell via water outlet pipes which are circumferentially and evenly distributed on the cooling water outlet water collection ring. The cooling water inlet water collection ring and the cooling water outlet water collection ring are connected with the foundation via the small supports configured below the cooling water inlet water collection ring and the cooling water outlet water collection ring respectively. The spray pipe throat channel segment water cooling structure is great in cooling effect, and the requirement of a hypersonic speed low-density wind tunnel blowing test can be met. Besides, the structure is simple, dismounting is convenient and cost is saved.

Description

technical field [0001] The invention relates to the field of hypersonic low-density wind tunnels, in particular to a water-cooling structure of a nozzle throat section of a hypersonic low-density wind tunnel. Background technique [0002] The low-density wind tunnel is essentially a hypersonic wind tunnel, which has all the characteristics of a blowing-suction wind tunnel, and is an important test equipment for studying the aerodynamic characteristics of rarefied gases. [0003] The nozzle is an important part that accelerates the airflow to the required speed and produces a uniform flow in the test section. It is very important for the design of hypersonic wind tunnel. The heating temperature of the hypersonic low-density wind tunnel heater is very high, which can reach above 1400K, so the heat flux density at the throat of the nozzle is very high, and the throat of the nozzle must be cooled with cooling water. [0004] At present, there is only one hypersonic low-density ...

AI Technical Summary

Problems solved by technology

[0004] At present, there is only one hypersonic low-density wind tunnel in China. Its nozzle is a water-cooled nozzle, and its cooling water channel is opened on the inner surface of the semicircular pad. The semicircular pad needs to be processed into a circular pad first. , and then use wire cutting to cut one into two, and process the longitudinal water tank on the inner surface of the circular cushion block. The process is complicated, the processing is difficult, the cost is high, and the structural strength of the inner wall of the nozzle cannot be improved.

Several cooling water inlet and outlet pipes of the nozzle are connected to the upper inlet and outlet of the flange of the outer casing through pipe joints. Since there are many inlets and outlets on the flange, several inlet and outlet pipes are connected, which makes the equipment layout very messy. And when the throat section needs to be replaced, each inlet and outlet pipe joint must be repeatedly assembled and disassembled, which takes a lot of work and effort, and repeated disassembly and assembly of the pipe joint is likely to cause water leakage

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