full2010.pdf - page 1462

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š°ŠÂ—Šš¸É čoĜ„µ¦š—° Á‡¦ºÉ°Š‡ª‡»¤°´˜¦µ„µ¦Å®¨ (Flow meter) »—´œš¹„ o °¤¼¨ ¨³šn °š°ŠÂ—ŠÎµ®¦´
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‹µ„„µ¦š—¨°Š‹³‡ª‡»¤°»–®£¼¤·°ŠœÊεĮo°¥¼n š¸É 22 oC, 30oC, 40oC ˜µ¤¨Îµ—´ ‡ª‡»¤°´˜¦µ„µ¦Å®¨ °Š
œÊεĮo°¥¼n š¸É 1, 2, 3,4,5,6 ¨·˜¦˜n°œµš¸ ˜µ¤¨Î µ—´ šÎµ„µ¦´œš¹„‡n µÂ¦Š—´œšµŠÁ oµÂ¨³šµŠ°°„ °ŠœÊεš¸É»—š—¨°Š
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„µ¦¼Á¸¥¡¨´ŠŠµœÁœºÉ°Š‹µ„„µ¦Å®¨ (Head loss) µ¤µ¦™‡Îµœª–Å—o×¥‹µ„¤„µ¦ °Š Darcy-Weisbach ‡º°
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f ‡º° ´¤ž¦³·š›·Í¦ŠÁ¸¥—šµœ (friction factor)
L ‡º° ‡ªµ¤¥µªšn° m
D ‡º ° ÁoœŸnµœ«¼œ¥r„¨µŠ£µ¥Äœšn° m
v ‡º° ‡ªµ¤Á¦Èª °Š °ŠÅ®¨£µ¥Äœšn° sm /
g ‡º ° ‡ªµ¤Á¦nŠÁœºÉ°Š‹µ„¦ŠÃœo¤™nªŠ °ŠÃ¨„ 2 / sm