Closed gas-liquid two-phase impingement cooling system and method

Abstract

The invention discloses a closed gas-liquid two-phase impingement cooling system and method, and belongs to the field of cooling high heating flux density parts in aviation, aerospace, power machinery, electronics and the like. The closed gas-liquid two-phase impingement cooling system mainly comprises an air compressor, a gas-water ejector, an impact cavity, an expansion machine, an electric generator, a condenser and a gas-water separator. The closed gas-liquid two-phase impingement cooling system is characterized in that the ejector is adopted for atomizing water, atomized liquid drops are formed in airflow, the advantages that the liquid phase is large in amount of vaporization latent heat, capable of enhancing cooling and good in impingement cooling effect are combined together, and the high-temperature cooled surface can be effectively cooled; the expansion machine outputs power and meanwhile can output electric energy outwards under the condition that power consumption of the air compressor is provided; the gas-water separator is adopted so that air and water can be separated, the water flows into a water tank, and the air enters the compressor; and in this way, cycle operation continues, and a closed system is formed. The cooling system can be applied to the occasions like hypersonic speed aircraft leading edges and gas turbine blades with high heating flux density.

Description

technical field [0001] The invention designs a closed gas-liquid two-phase impingement cooling system and method, and belongs to the field of cooling high heat flux components such as aviation, aerospace, power machinery, and electronics. Background technique [0002] In aviation, aerospace, electric power, electronics and other fields, many equipment components operate in high-temperature environments. For example, when a spacecraft adopts atmospheric braking technology, friction with the atmosphere generates aerodynamic heat, and the surface temperature can rise to hundreds of degrees Celsius; gas turbine blades work for a long time In the high temperature environment of 1000K-2000K, the life of component materials is seriously threatened, and the use of advanced cooling technology is one of the important ways to ensure the long-term reliable operation of these components in high temperature environment. [0003] Impingement cooling has been widely used due to its high hea...

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Problems solved by technology

[0003] Impingement cooling has been widely used due to its high heat transfer efficiency. The traditional two-phase impingement cooling device uses a water pump to pressurize the water and uses an atomizing nozzle to atomize the water, which not only increases the complexity of the equipment but also increases energy consumption.

In addition, the traditional impingement cooling system is an open system, and the heated airflow is not used and directly discharged into the environment, and water resources need to be continuously provided, resulting in a large amount of waste of heat and water resources

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