{"id":1739,"date":"2023-01-13T18:46:42","date_gmt":"2023-01-13T15:46:42","guid":{"rendered":"http:\/\/en.attech.ru\/?page_id=1739"},"modified":"2023-01-13T18:58:44","modified_gmt":"2023-01-13T15:58:44","slug":"small-sized-aerodynamic-stand-for-determining-the-efficiency-of-ice-forming-aerosol-generators","status":"publish","type":"page","link":"http:\/\/en.attech.ru\/?page_id=1739","title":{"rendered":"Small-sized aerodynamic stand for determining the efficiency of ice-forming aerosol generators"},"content":{"rendered":"
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Small-sized aerodynamic stand for determining the efficiency of ice-forming aerosol generators<\/strong><\/span><\/p>\r\nPURPOSE<\/strong><\/span>\r\n

The aerodynamic stand is intended for testing full-size generators of ice-forming aerosols in ground conditions. The stand allows to determine the ice-forming efficiency — the number of active particles per unit weight of the composition <\/span>or solution — at different temperatures of the supercooled cloud when the generators operate in conditions of blowing them with an air flow at a speed of up to 20 m\/s.<\/span><\/p>\r\n

COMPOSITION OF THE STAND<\/span><\/p>\r\n\r\n<\/div>\r\n<\/div>\r\n

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Fig.1. General view of the installation: wind tunnel (left), aerosol cube (middle) and cloud chamber (right)<\/span><\/p>\r\n

The aerodynamic stand consists of:<\/span><\/p>\r\n

\u2022 wind tunnel;<\/span><\/p>\r\n

\u2022 cloud camera;<\/span><\/p>\r\n

\u2022 aerosol dilution systems;<\/span><\/p>\r\n

\u2022 aerosol sampling systems;<\/span><\/p>\r\n

\u2022 systems of fastening and ignition of the aerosol generator;<\/span><\/p>\r\n

\u2022 ice crystal registration systems.<\/span><\/p>\r\n

The wind tunnel is designed to create an air flow blowing around the aerosol generator and includes:<\/span><\/p>\r\n

\u2022 high pressure fan;<\/span><\/p>\r\n

\u2022 working part with a diameter of 0,3 m and a length of 1,5 m;<\/span><\/p>\r\n

\u2022 exhaust pipe with a diameter of 1,0 m and a length of 6 m;<\/span><\/p>\r\n

\u2022 turbulator with a diameter of 0,1 m;<\/span><\/p>\r\n

\u2022 generator fastening system in the working part.<\/span><\/p>\r\n

The cloud chamber is designed to create a model fog with a given supercooling temperature. The working volume is 125 liters. The cloud chamber is equipped with a fan, an illuminator, a fog temperature meter and a steam generator.<\/span><\/p>\r\n

The aerosol dilution system is designed to dilute the initial aerosol concentration in the wind tunnel and includes:<\/span><\/p>\r\n

\u2022 sampler with a volume of 0,5 to 2 l;<\/span><\/p>\r\n

\u2022 an aerosol cube with a volume of 1000 l, inside of which there are fans for air mixing.<\/span><\/p>\r\n

The aerosol sampling system consists of:<\/span><\/p>\r\n

\u2022 intake comb located perpendicular to the direction of the air flow;<\/span><\/p>\r\n

\u2022 samplers with a volume of 50 ml up to 2000 ml.<\/span><\/p>\r\n

The registration system is designed to capture and further count ice crystals formed in the cloud chamber and includes:<\/span><\/p>\r\n

\u2022 thermostats;<\/span><\/p>\r\n

\u2022 optical microscope with digital camera.<\/span><\/p>\r\n\r\n<\/div>\r\n<\/div>\r\n

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Fig. 2. The working volume of the cloud chamber with thermostats, a thermometer, a fan, and a clarifier located in it<\/span><\/p>\r\n

MAIN SPECIFICATIONS<\/span><\/p>\r\n

\u2022 Diameter of the section of the working part of the installation \u2013 0,3 m;<\/span><\/p>\r\n

\u2022 Air flow speed — up to 20 m \/ s;<\/span><\/p>\r\n

\u2022 Supercooled fog temperature range — from -1\u00b0\u0421 to -25\u00b0\u0421;<\/span><\/p>\r\n

\u2022 Aerosol concentration dilution factor — up to 70;<\/span><\/p>\r\n

\u2022 The minimum and maximum measured values of the output: ice-forming particles — 107 and 1017 g-1;<\/span><\/p>\r\n

\u2022 The duration of one measurement is about 40 minutes;<\/span><\/p>\r\n

\u2022 Root-mean-square error of one measurement of the yield of ice-forming particles from 1 gram of a pyrotechnic composition at a temperature of minus 10\u00b0C is not more than \u00b1 120%;<\/span><\/p>\r\n

\u2022 Power consumption — no more than 1 kW \/ h.<\/span><\/p>\r\n

PRINCIPLE OF MEASURING THE ICE FORMING OUTPUT<\/span><\/p>\r\n

The measurement principle is to determine the number of ice crystals formed when a known sample of aerosol produced by the operation of an ice-forming aerosol generator in an air stream is introduced into a supercooled water mist.<\/span>\r\nAn air flow with specified characteristics is created in a wind tunnel.<\/span><\/p>\r\n

Fog is created in the working volume of the cooled cloud chamber by launching a jet of hot water vapor. The number of ice crystals formed is estimated from the number of crystals that fell per unit area of the cloud chamber floor.<\/span>\r\nThe capture of crystals is carried out in a microthermostat, which keeps ice crystals for a time sufficient for their counting with a microscope.<\/span><\/p>\r\n

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EFFICIENCY OF ICE-BREAKING COMPOSITIONS DEVELOPED IN RUSSIA WITH PARTICIPATION OF THE AGENCY<\/span><\/p>\r\n\r\n<\/div>\r\n<\/div>\r\n

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\r\n\r\nA similar aerodynamic stand was installed at the expense of the ANO «Agency ATTECH» in AO «ChPO named after V.I. Chapaev «(Cheboksary).<\/span>\r\n\r\n<\/div>\r\n<\/div>\r\n<\/div>\r\n<\/div>\r\n<\/div>\r\n<\/div>\r\n<\/div>\r\n<\/div>\r\n<\/div>\r\n<\/div>","protected":false},"excerpt":{"rendered":"

Small-sized aerodynamic stand for determining the efficiency of ice-forming aerosol generators PURPOSE The aerodynamic stand is intended for testing full-size generators of ice-forming aerosols in ground conditions. The stand allows to determine the ice-forming efficiency — the number of active particles per unit weight of the composition or solution — at different temperatures of the […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"page-templates\/full-width-page.php","meta":{"spay_email":""},"jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/P7ntMK-s3","jetpack-related-posts":[{"id":418,"url":"http:\/\/en.attech.ru\/?page_id=418","url_meta":{"origin":1739,"position":0},"title":"Small aerodynamic stand to determine the effectiveness of ice-forming aerosol generators","date":"24.04.2013","format":false,"excerpt":"APPOINTMENT Aerodynamic stand is designed to test full-sized ice-forming aerosol generators on the ground conditions. The stand allows to define ice-forming efficiency - the number of active particles from the unit weight of the composition or solution - at different temperatures of supercooled clouds when the generator is in blowing\u2026","rel":"","context":"\u041f\u043e\u0445\u043e\u0436\u0430\u044f \u0437\u0430\u043f\u0438\u0441\u044c","img":{"alt_text":"","src":"https:\/\/i0.wp.com\/en.attech.ru\/wp-content\/uploads\/2013\/04\/Sostav_3.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":993,"url":"http:\/\/en.attech.ru\/?page_id=993","url_meta":{"origin":1739,"position":1},"title":"DEVELOPMENTS \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0438","date":"02.12.2022","format":false,"excerpt":"Aircraft aerosol generator SAG-26 Ground aerosol generator GLA-105 Remote control system for ground generators via radio channel 3D Numerical Model of Reagent Propagation Mobile radar control system for IRO work Small-sized aerodynamic stand for determining the efficiency of ice-forming aerosol generators Aircraft carbon dioxide dosing device \"SMK-0000\" Ground aerosol liquid\u2026","rel":"","context":"\u041f\u043e\u0445\u043e\u0436\u0430\u044f \u0437\u0430\u043f\u0438\u0441\u044c","img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":371,"url":"http:\/\/en.attech.ru\/?page_id=371","url_meta":{"origin":1739,"position":2},"title":"Ground aerosol generators NAG-07 and GLA-105","date":"24.04.2013","format":false,"excerpt":"Currently, in the world of active influence on the clouds in order to regulate and control rainfall and hail are widely used ground fireworks and aerosol acetone generators. These generators can be used in places where the work of anti-hail rockets or aircraft equipment is prohibited (airports, highways, etc.). Taking\u2026","rel":"","context":"\u041f\u043e\u0445\u043e\u0436\u0430\u044f \u0437\u0430\u043f\u0438\u0441\u044c","img":{"alt_text":"","src":"https:\/\/i0.wp.com\/en.attech.ru\/wp-content\/uploads\/2013\/04\/NAG-07_1-300x224.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":1191,"url":"http:\/\/en.attech.ru\/?page_id=1191","url_meta":{"origin":1739,"position":3},"title":"\u0413\u043b\u0430 105 GLA 105","date":"05.12.2022","format":false,"excerpt":"\u00a0 At present, ground-based aerosol pyrotechnic and acetone generators are widely used in the world practice of active influence on clouds in order to regulate precipitation and combat hail. These generators can be used in places where anti-hail missiles or aircraft operations are prohibited (airports, highways, etc.). Taking into account\u2026","rel":"","context":"\u041f\u043e\u0445\u043e\u0436\u0430\u044f \u0437\u0430\u043f\u0438\u0441\u044c","img":{"alt_text":"","src":"https:\/\/i2.wp.com\/en.attech.ru\/wp-content\/uploads\/2022\/12\/wdwdw.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":375,"url":"http:\/\/en.attech.ru\/?page_id=375","url_meta":{"origin":1739,"position":4},"title":"Three-dimensional numerical model","date":"24.04.2013","format":false,"excerpt":"In 2010, completed the development of a numerical model to obtain information about the characteristics of the reagent distribution zones for different parameters and operating modes of the ground, aircraft and missile impacts in different weather conditions, taking into account the terrain and orographic characteristics of the underlying surface. To\u2026","rel":"","context":"\u041f\u043e\u0445\u043e\u0436\u0430\u044f \u0437\u0430\u043f\u0438\u0441\u044c","img":{"alt_text":"","src":"https:\/\/i2.wp.com\/en.attech.ru\/wp-content\/uploads\/2013\/04\/Anailiz_2.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":1151,"url":"http:\/\/en.attech.ru\/?page_id=1151","url_meta":{"origin":1739,"position":5},"title":"\u0422\u0435\u0445\u043d\u0438\u0447\u0435\u0441\u043a\u0438\u0435 \u0441\u0440\u0435\u0434\u0441\u0442\u0432\u0430 Technical means","date":"05.12.2022","format":false,"excerpt":"\u00a0 To carry out these works, the Agency has a number of aircraft and ground technical means and meteorological equipment. In the work on artificial regulation of precipitation, Russian aircraft such as An-12, Il-18, An-26, An-30, An-28, An-2 are used, equipped with technical means for influencing clouds and having airworthiness\u2026","rel":"","context":"\u041f\u043e\u0445\u043e\u0436\u0430\u044f \u0437\u0430\u043f\u0438\u0441\u044c","img":{"alt_text":"","src":"https:\/\/i2.wp.com\/en.attech.ru\/wp-content\/uploads\/2022\/12\/\u00d0\u00a1\u00d0\u00bd\u00d0\u00b8\u00d0\u00bc\u00d0\u00be\u00d0\u00ba-\u00d1\u008d\u00d0\u00ba\u00d1\u0080\u00d0\u00b0\u00d0\u00bd\u00d0\u00b0-2022-10-05-\u00d0\u00b2-20.20.38-300x148.png?resize=350%2C200","width":350,"height":200},"classes":[]}],"_links":{"self":[{"href":"http:\/\/en.attech.ru\/index.php?rest_route=\/wp\/v2\/pages\/1739"}],"collection":[{"href":"http:\/\/en.attech.ru\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"http:\/\/en.attech.ru\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"http:\/\/en.attech.ru\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/en.attech.ru\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1739"}],"version-history":[{"count":5,"href":"http:\/\/en.attech.ru\/index.php?rest_route=\/wp\/v2\/pages\/1739\/revisions"}],"predecessor-version":[{"id":1756,"href":"http:\/\/en.attech.ru\/index.php?rest_route=\/wp\/v2\/pages\/1739\/revisions\/1756"}],"wp:attachment":[{"href":"http:\/\/en.attech.ru\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1739"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}