The Influence of Laminarizers on the Turbulent Boundary Layer and Prediction of Effective Flow Conditions around Surfaces

The development of effective methods for boundary layer laminarization is a fundamental task for the efficient and reliable operation of power equipment. The main objective of the work is to study the effect of a damping surface on flows in the boundary layer occurring in complex gas-dynamic conditions and to implement a method for predicting effective conditions for flow past damping surfaces. The implementation of the mathematical model allows performing calcula-tions and creating a database for analyzing and selecting the most effective conditions for using a damping surface. To achieve the set goal, the following tasks were solved: development of a damping surface, complex experimental studies of wall flows on models with a damping sur-face, systematization of experimental data results, development of an original semi-empirical model of turbulent transfer in the boundary layer on a damping surface with its subsequent im-plementation in a software package for studying the boundary layer in a wide range of gas-dynamic conditions with external intense effects. The most important result of the work is the development of a method for laminarization of the boundary layer by means of a damping sur-face, the operating principle of which is to suppress turbulent pulsations of velocity and pressure near the streamlined surface. The significance of the obtained results lies in the proposal of a method for laminarization of the turbulent boundary layer and a technique for predicting effec-tive conditions of flow past surfaces, to reduce turbulent friction and increase the efficiency of surface cooling.