Search academic texts

Information × Registration Number 0221U101713, 0118U005413 , R & D reports Title The Estimation of the acoustic features by sound flap, given birth by detachable currents and supersonic flow. popup.stage_title Head Grinchenko Viktor T., Доктор фізико-математичних наук Registration Date 24-01-2021 Organization Institute of Hydromechanics of NAS of Ukraine popup.description2  An algorithm for numerical solution of problems of acoustic field generation by a flow in a channel with stenoses of arbitrary shape asymmetric with respect to the channel axis is constructed. The proposed algorithm belongs to the class of hybrid methods. It allows us to numerically simulate the dynamical process of converting the kinetic energy of the flow into sound energy. The calculations were performed on the cluster supercomputer Scit of the Institute of Cybernetics of the National Academy of Sciences of Ukraine. The principle of geometric parallelism was used to parallelize the calculations. The computing cores exchanged the values of the fields at the interface of the domain fragments using the MPI protocol. The procedures of open-source toolbox OpenFOAM were used for the calculations. At the second step of the constructed hybrid algorithm, the corresponding acoustic problems were solved. The Curle acoustic analogy was used for calculation of the acoustic fields generated by the flow. In this work we consider flows in a duct with solid obstacles - stenoses, i.e. sharp narrowings of the channel, which have holes asymmetric with respect to the channel axis. The contribution of dipole sound sources that occur when vortices interact with the solid surface of obstacles dominates in the acoustic field of such flows. Product Description popup.authors Borisyuk Andriy O. Vovk Igor V. Malyuga Volodymyr S. Rudnytska Mariya O. Sidko Mariya I. Sobol Tetiana V popup.nrat_date 2021-01-24 Close