Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : March 01, 2025
The Martian atmosphere differs significantly from Earth's in that it is extremely low in density and pressure, making it difficult to generate sufficient lift for aircraft. Accurate aerodynamic analysis is essential to design efficient airfoils and to predict flight performance under Martian conditions. In this study, a two-dimensional compressible fluid dynamics code has been developed to contribute to the design of Mars exploration aircraft. Numerical simulations are performed in the flow around a two-dimensional circular cylinder in the low Mach number regime for a validation of the developed code. The obtained drag coefficients are compared with experimental data over the Reynolds number range from 102 to 105. The results show that the drag coefficients obtained by the numerical analysis are generally in good agreement with those of the experimental data. The quantitative inconsistencies are thought to be due to factors such as the grid resolution near the wall surface, the number of inner iterations in the time integration method, and the absence of three-dimensional structure in the two-dimensional flow.
