Study of the cooling characteristics of organic solutions by injection

Yuming Lu, Hongzi Fei, Hao Yang and Hai Zhang

Energy, 2024, vol. 288, issue C

Abstract: Injection cooling can effectively reduce the high temperature of the intake air, improve the power of the turbojet engine, solve the problem of insufficient thrust for mode switching. The aim is to improve the simulation method based on the experimental data to investigate the thermodynamic process of cooling and the evaporation characteristics of particles by spraying organic solution at high Mach number. The results show that the organic solution has cooling effect on high-temperature air, but the cooling effect gradually decreases as the concentration increases, while the evaporation rate has the opposite trend. The highest evaporation rate of 91.59 % can be achieved for 50 % ethanol solution, the presence of ethanol in the solution has a facilitating effect on the evaporation of water. The cooling effect of the organic mixed solution can be compensated by increasing the injection rate. Compared with water, ethanol solution can increase the temperature drop value by 3.13K–80.26K when the high evaporation rate is guaranteed. For the same temperature drop effect, the residual amount of ethanol solution is less. The selection of a suitable organic solution as the coolant is beneficial to improve the evaporation characteristics of the medium and the thermodynamic properties of high-temperature inlet air.

Keywords: Injection; Organic mediums; Cooling; Spray; Nozzle (search for similar items in EconPapers)
Date: 2024
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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:288:y:2024:i:c:s036054422303236x

DOI: 10.1016/j.energy.2023.129842

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