ИСПОЛЬЗОВАНИЕ СОТОВОЙ ПОВЕРХНОСТИ ДЛЯ ПОВЫШЕНИЯ ИНТЕНСИВНОСТИ ТЕПЛООБМЕНА В СОПЛОВЫХ ЛОПАТКАХ ГАЗОВЫХ ТУРБИН

Abstract

The results of a numerical study of a flat plate containing honeycomb cells without holes for blowing cooling air onto the plate surface, and a flat plate containing honeycomb cells with holes in each cell for blowing cooling air onto the plate surface are presented. Holes in the cells of the honeycomb structure for blowing cooling air on the outer surface of the plate contribute to creating a film of cooling air on the outer surface of the plate (film cooling). Since there are more holes for blowing cooling air in the honeycomb design than in film cooling, this method of cooling a gas turbine blade is comparable to effusion cooling, which is considered one of the most effective methods, and this cooling method is located between film and transpiration (porous) cooling. The study used a combined cooling method that puts together both a convective cooling method due to the swirling movement of cooling air inside the honeycomb structure cells located on the blade inner surface, and an effusion cooling method, implemented by blowing cooling air onto the blade surface through holes in each honeycomb cell.