Xin ZHANG, Y. LU, XJ FAN

DOI Number: 10.60853/sg22-p251

Conference number: HiSST 2024-00139

The precooler is the core component of the precooled air-breathing combined engine, which is used to cool the incoming high-temperature air in a short time. A gas-solid-liquid coupled heat transfer program is developed to evaluate the flow heat transfer performance of a high-speed counter-flow air precooler. The program uses two methods to calculate the heat conduction of the solid. One is the “Node Current Method”, which is suitable for rapid evaluation of the performance of the precooler. The other is the “Fenics Finite Element Platform”, which is suitable for the performance evaluation of the precooler with complex structural shapes and stress analysis. The program can be used to evaluate the cooling performance of various coolants such as hydrogen, methane, ammonia and kerosene. The fuel cracking mechanism has been added to the program when calculating kerosene. The calculation results of two methods have been compared using hydrogen and methane as coolants. The relative error of calculated air outlet temperature is less than 1.1%. Kerosene with cracking mechanism has also been calculated when it is used to cool the 1800 K incoming air. To sum up, the high-speed counter-flow air precooler is suitable for the cooling of the air from Ma 2.5 to Ma 6.5, which corresponds to the temperature of 486 K to 1800 K. The program evaluates the heat transfer performance of the precooler well and is suitable for the evaluation of different forms of counter-flow air precooler.

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In Categories: 1.Events, HiSST 2024, Thermal and Energy Management
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