INSTALLATION FOR AIR INTAKE MODEL aerodynamic testing of an aircraft engine (optional)

摘要

The invention relates to the field of aerodynamic testing, in particular to facilities for the study of the conditions of vortex formation and entry of foreign particles into the air intake of an aircraft. Installation for aerodynamic test model of an aircraft engine air intake, comprising a model of the engine nacelle with the air intake system providing air sucking through the air inlet, a stationary screen that simulates a runway, container disposed under the front part of the air inlet, with the substance to which influences the vortex flow, arising under the air inlet, and the storage device mounted in the outlet portion of the model, while it is provided with the fan installation mouth ovkoy simulating model outer steering air flow of varying rate, direction and extent of unevenness, in a container placed solid particles selected from the conditions of similarity shape and dimensions, covered with a fluorescent paint, around the container is laid a layer of the same solid particles without coating forming together with solid particles in the vessel a total surface imitating the surface of the runway, setting additional light source is provided, providing the appearance of the fluorescence effect, and means photo- and / or video fixation trajectory of luminous particles, in which the washed river sand is used as the solid particles,; screened on calibrating sieve. According to the second embodiment of the installation solid particles selected from the conditions of similarity shape and dimensions, covered with a fluorescent paint, is poured directly onto the surface of the screen without using the container.; The technical result from the use of the utility model is to evaluate the degree of engine protection at the selected allocation scheme engine nacelle and determining the safe modes taxiing aircraft on the airfield through the received information about the trajectory of the solid particles (sand) at various engine operating modes and different external conditions (crosswind) and well as information on the trajectories of the particles after being hit them in the air intake duct and the place of their collision with the inner surface of the model. Moreover, the result is to obtain a flow pattern between the screen and the inlet of the air inlet, the nature of spread sand and the area and location of sand capture zone from the surface, determining the ratio of mass of sand entering the air intake, and weight of sand, dispersing over the surface of the runway, in specifically, depending on the size, weight and shape of the particles.