{"id":2756,"date":"2023-05-19T13:53:22","date_gmt":"2023-05-19T10:53:22","guid":{"rendered":"http:\/\/itm.dp.ua\/?page_id=2756"},"modified":"2023-05-19T13:57:18","modified_gmt":"2023-05-19T10:57:18","slug":"technology-of-computational-substantiation-of-the-design-parameters-of-complex-hydraulic-systems","status":"publish","type":"page","link":"http:\/\/itm.dp.ua\/?page_id=2756&lang=en","title":{"rendered":"Technology of computational substantiation of the design parameters of complex hydraulic systems"},"content":{"rendered":"\n<p><strong><em>Essence of the technology<\/em><\/strong><\/p>\n\n\n\n<p>\u0421omputer simulation of fast hydro- and gas-dynamic processes in complex hydraulic systems, which include manifolds, pilot-controlled valves, tanks, throttle valves, dead legs, etc., for the choice and substantiation of the design and operating parameters of specific engineering systems.<\/p>\n\n\n\n<p><strong><em>Advantages<\/em><\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u0410ccounting for: the design features of hydraulic lines (pipe diameters, wall thickness, material); the physical and chemical liquid\/gas properties; the hydraulic resistance of feed pipelines and control valves; the degree of gas saturation, gas release and discontinuity of flows; the propagation of wave processes in the system elements; the dynamics of electrically or pneumatically controlled valves; thermogas dynamic processes at the system outlets;<\/li>\n\n\n\n<li>Unified method for the representation of a branched hydraulic system and its operating conditions.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"http:\/\/itm.dp.ua\/wp-content\/uploads\/2023\/05\/Technol0006_1.jpg\" alt=\"\"\/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"http:\/\/itm.dp.ua\/wp-content\/uploads\/2023\/05\/Technol0006_2.jpg\" alt=\"\"\/><figcaption class=\"wp-element-caption\">Hydraulic schematic of the feed system of Liquid-propellant thrusters O \u2013 oxidizer tank; F \u2013 fuel tank; 1, 2 \u2013 thrusters<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"http:\/\/itm.dp.ua\/wp-content\/uploads\/2023\/05\/Technol0006_3.jpg\" alt=\"\"\/><figcaption class=\"wp-element-caption\">Overall view of a thruster<\/figcaption><\/figure>\n\n\n\n<p><strong><em>Operational testing<\/em><\/strong><\/p>\n\n\n\n<p>\u0410s applied to the feed system of two-component liquid-propellant spacecraft flight control thrusters (30 to 100 N thrusters: 8 to 20; simultaneously operating thrusters: 2 to 8). The characteristic times of mode switching (100 to 200 ms), propellant valve response (30 to 40 ms) and wave process propagation (5 to 20 ms) are comparable with one another.<\/p>\n\n\n\n<p><strong><em>Purpose<\/em><\/strong><\/p>\n\n\n\n<p>The choice, substantiation and optimization of the design parameters of complex branched hydraulic systems of airborne and space vehicles, rocket and internal-combustion engine fuel supply systems, urban water distribution systems, etc. operating in transient conditions (startup and shutdown transients, hydraulic shock, manifold restructuring, gas release, discontinuities).<\/p>\n\n\n\n<p><strong>Time history of the pressure in the combustors of thrusters 1, 2, and 3 when the thrusters are started sequentially<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"http:\/\/itm.dp.ua\/wp-content\/uploads\/2023\/05\/Technol0006_4.jpg\" alt=\"\"\/><figcaption class=\"wp-element-caption\">1\u0430 &#8211; thruster 1 thrust reduction due to the startup of thrusters 2 and 3, 2\u0430 &#8211; thruster 2 thrust reduction due to the startup of thruster 3<\/figcaption><\/figure>\n\n\n\n<p><strong>Effect of the propellant ignition delay time \u03c4<\/strong><sub><small>1<\/small><\/sub><strong>\u00a0, the electric-valve armature breakaway delay time \u03c4<\/strong><sub><small>2<\/small><\/sub><strong>\u00a0, and the valve opening time on the thruster startup<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"http:\/\/itm.dp.ua\/wp-content\/uploads\/2023\/05\/Technol0006_5.jpg\" alt=\"\"\/><figcaption class=\"wp-element-caption\">1 &#8211; momentary valve opening, 2 &#8211; with taking into account the valve response time<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td><strong>Contact information:<\/strong><\/td><\/tr><tr><td><strong>Institute of Technical Mechanics of the NASU and SSAU<\/strong><\/td><\/tr><tr><td><strong>Ukraine 49005<\/strong><br><strong>Dnipro<\/strong><br><strong>15 Leshko-Popel St.<\/strong><\/td><\/tr><tr><td><strong>Contact person:<\/strong><\/td><td>V.I. Tymoshenko<\/td><\/tr><tr><td><strong>Phone:<\/strong><\/td><td>(056) 372 06 41<\/td><\/tr><tr><td><strong>E-mail:<\/strong><\/td><td><a href=\"mailto:vitymoshenko@nas.gov.ua\">vitymoshenko@nas.gov.ua<\/a><br><a href=\"mailto:office.itm@nas.gov.ua\">office.itm@nas.gov.ua<\/a><\/td><\/tr><tr><td><strong>Web:<\/strong><\/td><td><a href=\"http:\/\/www.itm.dp.ua\/\">http:\/\/www.itm.dp.ua<\/a><\/td><\/tr><\/tbody><\/table><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Essence of the technology \u0421omputer simulation of fast hydro- and gas-dynamic processes in complex hydraulic systems, which include manifolds, pilot-controlled valves, tanks, throttle valves, dead legs, etc., for the choice&hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-2756","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"http:\/\/itm.dp.ua\/index.php?rest_route=\/wp\/v2\/pages\/2756","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/itm.dp.ua\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"http:\/\/itm.dp.ua\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"http:\/\/itm.dp.ua\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/itm.dp.ua\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2756"}],"version-history":[{"count":11,"href":"http:\/\/itm.dp.ua\/index.php?rest_route=\/wp\/v2\/pages\/2756\/revisions"}],"predecessor-version":[{"id":2769,"href":"http:\/\/itm.dp.ua\/index.php?rest_route=\/wp\/v2\/pages\/2756\/revisions\/2769"}],"wp:attachment":[{"href":"http:\/\/itm.dp.ua\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2756"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}