Investigation of the aerodynamic resistance of gas turbine engine dust protection devices during two-phase flows

Abstract

The paper deals with the topical problem of preventing dust and other foreign objects from entering the air intakes of helicopter turboshaft engines. A review of existing dust protection devices and methods for calculating pressure losses in them is presented. Based on experimental investigations, the values of the experimental coefficient for the Gasterstadt formula were obtained, which takes into account the effect of the mass concentration of the solid phase on pressure losses in dust protection devices. It was found that the pressure loss coefficient increases with increasing particle density. It has been established that the highest increase in pressure losses is observed in systems with concrete particles, which is associated with their high specific surface area, bulk density and shape. An equation is proposed for determining the pressure loss coefficient applicable to materials of different densities and specific surface areas. The results obtained can be used in the design and study of processes related to the movement of two-phase media, in particular, in the development of dust protection devices for helicopter turboshaft engines. doi 10.54708/19926502_2024_28310556