METHOD FOR DETERMINATION OF DISPERSION COMPOSITION OF AEROSOL PARTICLES IN EXHAUST GASES

FIELD: physics. ^ SUBSTANCE: in the proposed method for determination of dispersion composition of aerosol particles in exhaust gases a flux of optical radiation is passed through a domain of aerosol particles with the domain of aerosol particles irradiated with such optical radiation flux. Then one forms an image on the screen of the fluxes of the optical radiation, scattered in the course of penetration through the domain of aerosol particles, and concludes on the aerosol particles dispersion composition. The optical radiation flux is represented by a laser beam the sizes whereof are increased by way of passage through a collimator formed by two lenses; the produced laser beam is cut to size of the video camera digital matrix by means of a diaphragm. After irradiation of the domain of aerosol particles wit such beam the produced flux of laser radiation scattered by aerosol particles is directed onto the speed video camera digital matrix. Then one forms an image on the digital matrix screen of the flux of optical radiation, scattered in the course of penetration through the domain of aerosol particles for the microparticles hologram registration. Prior to irradiation of the domain of aerosol particles with the laser beam the latter is directed onto the speed video camera digital matrix to form an image on the digital matrix screen of the flux of optical radiation for registration of the hologram without microparticles One concludes on the aerosol particles dispersion composition after conversion of the produced microparticles hologram and the hologram without microparticles into a digital form with the help of an analogue-to-digital converter by way of subtraction of the pattern of the hologram without microparticles from that of the microparticles hologram and subtraction of constant flare of the speed video camera digital matrix from the pattern thus produced. ^ EFFECT: development of a method enabling objective registration of the whole range of particle sizes in the process of motion of a dispersed aerosol particles flux as well as automation of their sizes measurement results. ^ 3 dwg Способ может быть использован в двигателях для оценки дисперсного состава выхлопных газов. В способе определения дисперсного состава аэрозольных частиц в выхлопных газах пучок оптического излучения пропускают через область аэрозольных частиц, облучают область аэрозольных частиц этим пучком оптического излучения. Затем формируют изображение на экране из потоков рассеянно