Centreline velocity characteristics of rectangular unflanged hoods and slots under suction

<?xml version="1.0" encoding="UTF-8"?><collection xmlns="http://www.loc.gov/MARC21/slim" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.loc.gov/MARC21/slim http://www.loc.gov/standards/marcxml/schema/MARC21slim.xsd">
  <record>
    <leader>00000nab a2200000 i 4500</leader>
    <controlfield tag="001">MAP20071017154</controlfield>
    <controlfield tag="003">MAP</controlfield>
    <controlfield tag="005">20080418114941.0</controlfield>
    <controlfield tag="007">hzruuu---uuuu</controlfield>
    <controlfield tag="008">940204e19771001gbr||||    | |00010|eng d</controlfield>
    <datafield tag="035" ind1=" " ind2=" ">
      <subfield code="a">6800003077</subfield>
    </datafield>
    <datafield tag="040" ind1=" " ind2=" ">
      <subfield code="a">MAP</subfield>
      <subfield code="b">spa</subfield>
    </datafield>
    <datafield tag="084" ind1=" " ind2=" ">
      <subfield code="a">872</subfield>
    </datafield>
    <datafield tag="100" ind1="1" ind2=" ">
      <subfield code="0">MAPA20080043179</subfield>
      <subfield code="a">Fletcher, B.</subfield>
    </datafield>
    <datafield tag="245" ind1="1" ind2="0">
      <subfield code="a">Centreline velocity characteristics of rectangular unflanged hoods and slots under suction</subfield>
      <subfield code="c">B. Fletcher</subfield>
    </datafield>
    <datafield tag="520" ind1=" " ind2=" ">
      <subfield code="a">Measurements of centreline velocities in front of rectangular unflanged exhaust hoods, with areas between 25 and 900 cm2 and aspect ratios (ratio of slot length to its width) between 1:1 and 16:1 have shown that for a given face area and volume flow the velocity at a fixed point decreases as the aspect ratio increases. The present experiments show that design formulae previously used to predict these velocities are not valid over the range of aspect ratios usually claimed for them, and a new non-dimensionalized formula which takes account of aspect ratio is proposed</subfield>
    </datafield>
    <datafield tag="650" ind1="1" ind2="1">
      <subfield code="0">MAPA20080585679</subfield>
      <subfield code="a">Higiene industrial</subfield>
    </datafield>
    <datafield tag="650" ind1="1" ind2="1">
      <subfield code="0">MAPA20080605278</subfield>
      <subfield code="a">Contaminantes químicos</subfield>
    </datafield>
    <datafield tag="650" ind1="1" ind2="1">
      <subfield code="0">MAPA20080565954</subfield>
      <subfield code="a">Humos tóxicos</subfield>
    </datafield>
    <datafield tag="650" ind1="1" ind2="1">
      <subfield code="0">MAPA20080613655</subfield>
      <subfield code="a">Control de contaminantes</subfield>
    </datafield>
    <datafield tag="650" ind1="1" ind2="1">
      <subfield code="0">MAPA20080539566</subfield>
      <subfield code="a">Polvo</subfield>
    </datafield>
    <datafield tag="650" ind1="1" ind2="1">
      <subfield code="0">MAPA20080552923</subfield>
      <subfield code="a">Velocidad</subfield>
    </datafield>
    <datafield tag="650" ind1="1" ind2="1">
      <subfield code="0">MAPA20080537210</subfield>
      <subfield code="a">Aire</subfield>
    </datafield>
    <datafield tag="650" ind1="1" ind2="1">
      <subfield code="0">MAPA20080560997</subfield>
      <subfield code="a">Ventilación</subfield>
    </datafield>
    <datafield tag="650" ind1="1" ind2="1">
      <subfield code="0">MAPA20080612597</subfield>
      <subfield code="a">Sistemas de ventilación</subfield>
    </datafield>
    <datafield tag="650" ind1="1" ind2="1">
      <subfield code="0">MAPA20080566043</subfield>
      <subfield code="a">Investigación</subfield>
    </datafield>
    <datafield tag="740" ind1="4" ind2=" ">
      <subfield code="a">The Annals of occupational hygiene</subfield>
    </datafield>
    <datafield tag="773" ind1="0" ind2=" ">
      <subfield code="t">The Annals of occupational hygiene</subfield>
      <subfield code="d">Oxford [etc.]</subfield>
      <subfield code="g">nº 2, October 1977 ; p. 141-146</subfield>
    </datafield>
  </record>
</collection>