Numerical simulation of the unfinned spinning body interaction with a supersonic flow
The article presents the results of the computational investigation of the spinning and non-spinning rotation body flow at supersonic speeds of the windstream (М∞ = 2,0…4,0). The study aims at determining the applicability and verification of the numerical method based on Reynolds-averaged Navier—Stokes equations (RANS method) closed with the turbulence model to the calculation of the flow around the spinning unfinned bodies with the supersonic flow. Due to the computations by means of the software package ANSYS 14.5 we have obtained the distribution of pressure and shearing strain along the surface of the rotation body and found the coefficients of the summed aerodynamic forces and moments for both the spinning and non-spinning body. The obtained results for pressure distribution and Magnus force dependence on the angle of attack are compared with the available experimental data. It is established that without rotation a discrepancy between the calculated and experimental values of pressure distribution along the surface of the body is less than or equal to 5%. As there is no experimental data on pressure distribution for the body of rotation we compare the integral characteristics: Magnus force and moment. Under the attached flow the discrepancy between the calculation and experimental data does not exceed 7%, and with the development of flow separation the convergence of the calculated and experimental values disimproves. Based on the research conducted we can conclude that the method used may be applied for estimating the influence of rotation on the aerodynamic characteristics of the spinning body at supersonic speeds
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