A Comparative Investigation into Aerodynamic Performances of Two Set Finned Bodies with Circular and Non Circular Cross Sections

摘要

According to the advantages of noncircular bodies in storage and carriage purposes, these bodies have gained substantial attention by many researchers. In this paper, two circular and square (with rounded corners) bodies, which are attached to two fins, are studied in the free stream Mach number of 0.8.3. The cross section areas of bodies are the same. This work is done using experiment and CFD methods. In the CFD work, a three-dimensional, compressible, stationary, viscous, turbulent flow is simulated using FLUENT code with the standard k-ε model and adaptive grids. The comparison of the results of experiment and CFD simulation shows that the results of CFD are enough accurate. The experiment data in different angles of attack indicate that the square fin-body configuration has higher aerodynamic lift and drag coefficients than the circular one. Also, the results indicate the same aerodynamic performance for both bodies. The results of CFD confirm the deduction obtained from experiment and also they explain the aerodynamic parameters of different parts of fin-body configurations (body alones, bases of bodies, and fins) which are very considerable. The physics of flow is also studied using the pressure contours and velocity vectors.