Вплив блокування отворів видуву охолоджувача на ефективність плівкового охолодження

The article is devoted to the computer simulation of film cooling of a flat plate with the supply of a secondary flow in a series of inclined holes with their partial blocking. Calculations were performed in the commercial ANSYS CFX 2019 R2 software complex with a change in the injection parameter from 0.5 to 1.5, which were selected according to real conditions, using the SST turbulence model. When the blocking parameter increases from 0.5 to 1.5, the film cooling efficiency decreases by 3.1 %, 6.7 %, and 10.6 %, respectively, compared to the traditional scheme without blocking. As the blow-in parameter increases, significant non-uniformity of film cooling efficiency remains over the entire length of the plate, with pronounced maxima along the axis of the cooler blow holes and minima in the region between the holes. On the other hand, a pronounced symmetry is preserved on each configuration of the plate. As the analysis of the distribution of the local effectiveness of the film cooling on the plane of the plate for each blocking configuration showed, the effectiveness of the film cooling uniformly decreases with an increase in the blowing parameter.