{"id":391,"date":"2023-01-25T14:29:13","date_gmt":"2023-01-25T13:29:13","guid":{"rendered":"http:\/\/wprace.vukv.cz\/?post_type=vyvoj&#038;p=391"},"modified":"2023-02-22T08:42:08","modified_gmt":"2023-02-22T07:42:08","slug":"aerodynamics","status":"publish","type":"vyvoj","link":"https:\/\/www.vukv.cz\/en\/development\/aerodynamics\/","title":{"rendered":"Aerodynamics"},"content":{"rendered":"<span class=\"translation-block\"><p>V\u00daKV a. s. deals with the wide spectre of questions in connection with the aerodynamic effects arising during an interaction of railway vehicles and infrastructure:<\/p>\n<ul>\n<li>Aerodynamic effects on open track (LOC &amp; PAS TSI, INF TSI, EN 14067-4) \u2013 analytical or CFD assessment and optimization of vehicles, analysis of impacts on infrastructure;<\/li>\n<li>Maximum pressure variations in tunnels (LOC &amp; PAS TSI, INF TSI, EN 14067-5) \u2013 numerical simulation and analysis of pressure signatures;<\/li>\n<li>Vehicle stability in cross wind \u2013 analysis and assessment according to EN 14067-6 or Ril 807.04 (analytic calculations, aerodynamic tunnel measurement, Multi-Body simulation), risk analysis of a&nbsp;vehicle operation on specific infrastructure section;<\/li>\n<li>Vehicle running resistance \u2013 total resistance calculations, assessment and optimization of the vehicle aerodynamic drag;<\/li>\n<li>Aerodynamic effects on ballasted track \u2013 critical areas analysis, proposals of countermeasures;<\/li>\n<li>Inlets and outlets \u2013 CFD assessment and optimization of aerodynamic effects (pressure and temperature field) around the areas of inlets and outlets;<\/li>\n<li>Vehicle and infrastructure loading due to aerodynamic effects \u2013 calculation of structure loads due to operation on open track, wind effects, operation in tunnels, vehicle passing, etc., definition of appropriate operational scenarios or proposals of operational countermeasures;<\/li>\n<li>Pressure tightness and pressure comfort \u2013 assessment and analysis of pressure tightness of the whole vehicle or separate components, analysis of pressure comfort for specific operation (on account of vehicle, infrastructure, operational scenario);<\/li>\n<li>Inner aerodynamics \u2013 analysis of the airflow in vehicle interior, in air ducting, etc.<\/li>\n<\/ul>\n<p>V\u00daKV a.s. offers its capacity and experience in the aerodynamic area for the following activities:<\/p>\n<ul>\n<li>Consultancy during the study, design, testing and approval of vehicles or infrastructure;<\/li>\n<li>Supervising of aerodynamics during the project;<\/li>\n<li>Numerical simulation of the pressure variations in tunnels, structure loading, pressure comfort;<\/li>\n<li>CFD simulation (in cooperation with external subjects);<\/li>\n<li>Aerodynamic tunnel measurement (in cooperation with external subjects);<\/li>\n<li>Compilation of test specifications and other documents needed for homologation of vehicle or infrastructure.<\/li>\n<\/ul>\n<\/span>","protected":false},"excerpt":{"rendered":"<p>V\u00daKV a. s. deals with the wide spectre of questions in connection with the aerodynamic effects arising during an interaction of railway vehicles and infrastructure: Aerodynamic effects on open track (LOC &amp; PAS TSI, INF TSI, EN 14067-4) \u2013 analytical or CFD assessment and optimization of vehicles, analysis of impacts on infrastructure; Maximum pressure variations [&hellip;]<\/p>\n","protected":false},"featured_media":483,"template":"","class_list":["post-391","vyvoj","type-vyvoj","status-publish","has-post-thumbnail","hentry"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.vukv.cz\/en\/wp-json\/wp\/v2\/vyvoj\/391","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vukv.cz\/en\/wp-json\/wp\/v2\/vyvoj"}],"about":[{"href":"https:\/\/www.vukv.cz\/en\/wp-json\/wp\/v2\/types\/vyvoj"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.vukv.cz\/en\/wp-json\/wp\/v2\/media\/483"}],"wp:attachment":[{"href":"https:\/\/www.vukv.cz\/en\/wp-json\/wp\/v2\/media?parent=391"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}