METHOD FOR DRAWING AIR SAMPLES FROM AIRCRAFT BOARD FOR DETERMINING AEROSOL AND/OR GASEOUS IMPURITIES AND DEVICE FOR ITS IMPLEMENTATION

摘要

FIELD: measuring equipment.;SUBSTANCE: sample is drawn in compliance with the isokinetic condition. The air sampler with the air duct system is installed on the outside of the aircraft fuselage in an area where there is no disturbance of the air flow created by the elements of the aircraft structure. In this case, the inlet ends of the air intake pipes of the air duct system of the mentioned sampler are taken out to the area free of disturbance created by the sampler structure elements and directed towards the air flow. In this case, the diameter of the nozzles of the inlet ends of the air intake pipes is selected depending on the air speed of the aircraft flight, and the outlet ends of the air intake ducts of the air duct system are taken out to the aircraft cabin and connected to the corresponding consumers of air samples. The device contains the air duct system for drawing air samples and an air flow stimulator. The air duct system includes inlet air intake pipes, which represent at least two pipes of different diameters, bent at an angle of 90 degrees, and at least two exhaust nozzles. The Venturi pipe is used as an air flow stimulator. At the same time, the outlet ends of the exhaust nozzles are connected to the Venturi pipe.;EFFECT: ensuring isokinetic drawing of air samples from the aircraft board to determine aerosol impurities and gaseous impurities, additionally.;11 cl, 4 dwg