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pri sistemih redčenja s celotnim tokom mora pretok izkazovati reynoldsovo število (re) < 1700.
in the case of full flow dilution systems, it shall have a flow reynolds number (re) of < 1700;
vetrovniki ali vetrovne naprave, razen dvodimenzionalnih delov, ki lahko simulirajo reynoldsovo število toka nad 25 × 106.
wind tunnels or devices, other than two-dimensional sections, capable of simulating reynolds number flows exceeding 25 × 106.
vetrovniki ali vetrovne naprave, razen dvodimenzionalnih delov, ki lahko simulirajo reynoldsovo število toka nad 25 × 106.
wind tunnels or devices, other than two-dimensional sections, capable of simulating reynolds number flows exceeding 25 × 106.
pri vseh preskušanjih emisij mora biti reynoldsovo število na grlu ssv v območju reynoldsovih števil, ki se uporabljajo za izpeljavo kalibracijske krivulje, izpeljane v odstavku 9.5.4.
during all emissions tests, the reynolds number at the ssv throat shall be in the range of reynolds numbers used to derive the calibration curve developed in paragraph 9.5.4.
mora imeti dovolj majhen premer, da nastane vrtinčast tok (reynoldsovo število je večje od 4000), in biti dovolj dolg, da se izpušni plini in zrak za redčenje popolnoma premešajo.
shall be small enough in diameter to cause turbulent flow (reynolds number greater than 4 000) of sufficient length to cause complete mixing of the exhaust and dilution air.
mora biti pri sistemih za delno vzorčenje dovolj dolg, da se izpušni plini in redčilo v vrtinčastem toku popolnoma premešajo (reynoldsovo število re je večje od 4000, pri čemer temelji na notranjem premeru tunela za redčenje); pri sistemih za celotno vzorčenje ni treba, da se izpušni plini in redčilo popolnoma premešajo;
shall be of a sufficient length to cause complete mixing of the exhaust and diluent under turbulent flow conditions (reynolds number, re, greater than 4000, where re is based on the inside diameter of the dilution tunnel) for a fractional sampling system, i.e. complete mixing is not required for a total sampling system,