Performance Variation by Design Parameters of Submerged Inlet in Transonic Flow

초록

The submerged inlet has advantages such as drag and weight reduction, however, it also has a disadvantage in that it leads to a higher total pressure loss and severe flow distortion. Therefore, it is necessary to search for an inlet design that satisfies the required mass flow rate while providing maximum performance according to various design parameters. In this study, an optimal design of a submerged inlet for transonic flow was analyzed through numerical simulations. To find the inlet design with the highest performance, four design parameters were considered. The analysis revealed that the performance of the inlet increases as the length of the ramp planform becomes shorter. Additionally, the inlet mass flow rate and total pressure recovery increase when the planform shape is straight rather than curved. By reducing the ramp angle and lip curvature, the performance of the submerged inlet increased. It was also confirmed that the disadvantages of the straight planform could be supplemented by giving the sidewall angle. Through the analysis results, it was confirmed that it is possible to design a submerged inlet that shows the maximum mass flow rate and optimal performance under transonic conditions.

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