ЧИСЛЕННОЕ МОДЕЛИРОВАНИЕ ПРОЦЕССОВ ВЗАИМОВЛИЯНИЯ ВОЛНЫ ГАЗА И ДЕФОРМИРОВАННОЙ ПРЕГРАДЫ В МОДЕЛЬНОМ КАНАЛЕ АВИАЦИОННОГО ДВИГАТЕЛЯ

Abstract

The aim of the study is to adapt the ANSYS CFX and ANSYS Mechanical engineering analysis systems for numerical calculations of acoustic processes in the model channels of an aircraft engine. Numerical experiments were carried out in the 2FSI (2-way Fluid-Structure Interaction Explained) formulation, which allows taking into account the interaction between the gas and the structure. A mathematical model for gas-dynamic processes is formulated, which is based on the laws of conservation of mass, momentum, energy and is closed by the equations of state of an ideal compressible gas and turbulence. A mathemati-cal model is formulated for estimating the stress-strain state of a structure, taking into account the movement of the partition in the framework of the linear theory of elasticity. Boundary conditions are determined. The task of the study was to evaluate the influence of the choice of the type of partition material on the propagation of a sound wave along the flow to the partition and beyond. As a partition, materials were chosen that differ in the value of the modulus of elasticity and Poisson's ratio, steel, tita-nium and polyethylene. Graphical dependences of the pressure amplitude at six control points are obtained. Graphs of moving partitions depending on the type of material are obtained. Computational experiments were carried out at Perm National Re-search Polytechnic University using the computing resources of the cluster of the Center for High-Performance Computing Sys-tems.