Abstract
In the process of injection cooling, the selection of working mediums brings different effects. However, most researches still focus on water. Compared with water, the vapor formed by the evaporation of organic cooling mediums such as ethanol can assist combustion in the combustion chamber. The current research on the cooling effect of organic mediums is relatively lacking. Therefore, related tests on the cooling effect of organic working fluids are conducted. The test results show that: as the spray temperature decreases from 45 & DEG;C to 18 & DEG;C, the cooling effect improves (maximum temperature drop reaches 63 & DEG;C). Ethanol solutions of various concentrations can maintain an evaporation rate of more than 75%, and its evaporation and cooling effect are improved with the concentration increase. Not all organic cooling mediums can bring good temperature drop and evaporation effects, including glycol solution. In working conditions, a higher airflow temperature (up to 150 ?) can enhance the cooling effect of the working mediums, and the liquid-gas ratio (6.62-10.76%) has almost no influence on the temperature drop. Finally, the simulation results are calibrated through the test data to verify the accuracy of the simulation and confirm the accuracy and reliability of the test method.
NSTL
Elsevier