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Document Index: 98840469

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1 EESTI STANDARD EVS-EN :2003 Railway applications - Aerodynamics - Part 3: Aerodynamics in tunnels Railway applications - Aerodynamics - Part 3: Aerodynamics in tunnels EESTI STANDARDIKESKUS
2 EESTI STANDARDI EESSÕNA NATIONAL FOREWORD Käesolev Eesti standard EVS-EN :2003 sisaldab Euroopa standardi EN :2003 ingliskeelset teksti. Käesolev dokument on jõustatud ja selle kohta on avaldatud teade Eesti standardiorganisatsiooni ametlikus väljaandes. Standard on kättesaadav Eesti standardiorganisatsioonist. This Estonian standard EVS-EN :2003 consists of the English text of the European standard EN :2003. This document is endorsed on with the notification being published in the official publication of the Estonian national standardisation organisation. The standard is available from Estonian standardisation organisation. Käsitlusala: This European Standard describes physical phenomena of railway-specific aerodynamics and gives recommendations for the documentation of tests Scope: This European Standard describes physical phenomena of railway-specific aerodynamics and gives recommendations for the documentation of tests ICS Võtmesõnad: Eesti Standardikeskusele kuulub standardite reprodutseerimis- ja levitamisõigus
3 EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM EN April 2003 ICS English version Railway applications - Aerodynamics - Part 3: Aerodynamics in tunnels Applications ferroviaires - Aérodynamique - Partie 3: Aérodynamique en tunnel Bahnanwendungen - Aerodynamik - Teil 3: Aerodynamik im Tunnel This European Standard was approved by CEN on 2 January CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2003 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN :2003 E
4 EN :2003 (E) Contents Foreword Scope Normative references Aerodynamic resistance General Resistance to motion formula Aerodynamic effects of a single train passing through a tunnel General Pressure transients Flow velocities Forces on objects and people in the tunnel Implications Aerodynamic effects of crossing trains in a tunnel General Pressure transients Flow velocities Forces on objects and people Implications Test methods Facilities with moving models Full scale tests...12 Bibliography
5 EN :2003 (E) Foreword This document EN :2003 has been prepared by Technical Committee CEN /TC 256, "Railway applications", the secretariat of which is held by DIN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by October 2003, and conflicting national standards shall be withdrawn at the latest by October This European Standard is part of the series Railway applications Aerodynamics which consists of the following parts: Part 1: Symbols and units Part 2: Aerodynamics on open track Part 3: Aerodynamics in tunnels Part 4: Requirements and test procedures for aerodynamics on open track 1) Part 5: Requirements and test procedures for aerodynamics in tunnels 1) This document includes a Bibliography. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard : Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and the United Kingdom. 1) in preparation 3
6 EN :2003 (E) 1 Scope This European Standard describes physical phenomena of railway-specific aerodynamics and gives recommendations for the documentation of tests. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text, and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies (including amendments). EN , Railway applications Aerodynamics Part 1: Symbols and units. 3 Aerodynamic resistance The symbols used in the present standard are explained in EN General As the drag may be drastically increased in a tunnel, it is also important to deal here with this additional source of resistance. 3.2 Resistance to motion formula In a tunnel, the same resistance to motion formula as in the open air can be used under otherwise identical conditions (straight and level track, constant speed), the only modification is the introduction of a tunnel factor T f in the third term: C2v tr TfC3v tr R = C + (1) T f is the ratio ( 1) of the tunnel drag by the open air drag. It varies during the train passage through the tunnel. The increase of drag in a tunnel expressed by T f depends on many factors, the blockage ratio B of the train in the tunnel is by far the most important of them. But the type of the train and its Iength also have to be considered, as well as, at Ieast for short tunnels (< 2000 m), the tunnel Iength and the train speed. Examples of the variation of T f averaged over the whole passage through the tunnel, with the blockage ratio B, the train Iength L tr, the tunnel length L tu, the train speed v tr and the type of train are given in Figures 1 and 2. A method to calculate the averaged tunnel factor T f is given in pren (wi ). 4