Method and device for designing air precooler containing phase change

Abstract

The invention provides a method and device for designing an air precooler containing phase change, a computer system and a storage medium, and the method comprises the steps that the temperature, pressure and flow of an air inlet and the temperature and pressure of a coolant inlet are given, and the air temperature drop of the air precooler containing phase change is given; the air heat exchange amount is obtained according to the air flow, the air specific heat capacity and the air temperature drop; a surface heat transfer coefficient of an air channel, a surface heat transfer system h of a coolant channel and an average heat transfer coefficient of a two-phase coolant channel are determined, and a total heat transfer coefficient of the precooler is further calculated; according to the heat transfer average temperature difference and the heat exchange amount before phase change, in the phase change process and after phase change of the coolant of the air precooler, the cold and hot fluid average temperature difference of the air precooler is calculated; and the effective heat exchange area is obtained according to the total heat transfer coefficient of the precooler and the average temperature difference of the cold fluid and the hot fluid so as to determine the final structure of the air precooler containing phase change. The heat exchange potential of the coolant can be exerted to the maximum extent.

Description

technical field [0001] The technical field of air precooler design of the present invention, in particular, relates to a design method, device, computer system and storage medium for an air precooler with phase change. Background technique [0002] For combined engine air and its deep pre-cooling technology, the low-resistance and high-efficiency heat transfer of the pre-cooler is an eternal topic. According to the heat transfer formula, as the effective heat transfer area increases, the heat transfer capacity of the precooler will increase accordingly, but this will result in an increase in engine mass. For the pre-cooling engine, although it has many advantages such as simple structure, how to achieve the required heat exchange efficiency within the range of the smallest mass increase is an urgent problem to be solved. In addition, for a supersonic strong precooling turbine engine, the precooler is the core component that can greatly cool down the high temperature incomin...

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Problems solved by technology

According to the heat transfer formula, as the effective heat transfer area increases, the heat transfer capacity of the precooler will increase accordingly, but this will result in an increase in engine mass

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