Low-flow-resistance jet spray type liquid cooling low-temperature gas supply device and application thereof

By designing a hemispherical flow guide structure and a low-flow-resistance jet spray-type liquid cooling device with a multi-nozzle system in a low-temperature wind tunnel, the problems of uneven droplet distribution, incomplete evaporation and fluctuation in flow resistance are solved, and uniform gas-liquid mixing and efficient heat exchange are achieved, meeting the airflow quality requirements of the low-temperature wind tunnel.

CN120444805APending Publication Date: 2025-08-08HUAZHONG UNIV OF SCI & TECH
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Patent Information

Application Number
CN202510597150.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-05-09
Publication Date
2025-08-08

AI Technical Summary

Technical Problem

The existing jet spray pre-cooling technology has problems such as uneven distribution of droplets, insufficient evaporation, local overheating and sudden flow resistance, which leads to unstable heat exchange effect and is difficult to meet the high requirements of low-temperature wind tunnels for airflow quality.

Method used

A gas flow guide system including a hemispherical flow guide structure and annular groove is designed, and a liquid supply system with uniform distribution of multiple nozzles is combined to achieve uniform mixing of gas and liquid phases. Molybdenum-tungsten alloy material and a split liquid nitrogen liquid collecting ring are used to optimize the nozzle arrangement angle to improve mixing uniformity and heat exchange efficiency.

Benefits of technology

The uniformity of gas-liquid mixing and heat exchange effect are improved, the flow resistance is reduced, the uniformity of temperature distribution and total pressure recovery coefficient are improved, and the flow structure and heat exchange stability are enhanced.

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Abstract

The invention belongs to the technical field of fluid mixing heat exchange, and particularly relates to a low-flow-resistance jet spray type liquid cooling low-temperature gas supply device and application thereof. Comprising a gas diversion system and a liquid supply system; the gas diversion system comprises a pre-cooling pipeline and a hemispherical diversion structure arranged in the pre-cooling pipeline; the precooling pipeline comprises an air inlet and an air outlet; the liquid supply system is arranged around the gas inlet end of the pre-cooling pipeline, communicates with the pre-cooling pipeline through a nozzle system arranged in the circumferential direction and is used for spraying liquid nitrogen into the pre-cooling pipeline so as to cool gas to be cooled; the hemispherical flow guide structure is arranged at the air inlet end of the pre-cooling pipeline, and the spherical face side of the hemispherical flow guide structure faces the air inlet and is used for guiding sprayed liquid nitrogen. In the working process, the temperature uniformity and the total pressure recovery coefficient are high, and the temperature distortion rate is low.
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