“weir”的概念、定义、翻译、参考文献-科学参考

weir

Chemical Engineering

A vertical obstruction across a channel carrying a liquid over which the liquid discharges. In a distillation column, a weir is used to retain an amount of liquid on a sieve tray or plate. While the vapour enriched with the more volatile component rises up through the perforations on the sieve tray or plate, the liquid cascades over the weir into the downcomer to the tray below. The weir crest is the top of the weir over which the liquid flows.

Geology and Earth Sciences

An engineered structure extending across an open water channel. It is possible to calculate the volume of water flowing over a weir from a knowledge of its particular characteristics. Weirs are designed for flow measurement in a variety of shapes but the most common are the suppressed, contracted, V-notch, trapezoid, and broad-crested types. Other weirs may be used to control river water levels or divert flow into channels.

单词	weir
释义	weir Chemical Engineering A vertical obstruction across a channel carrying a liquid over which the liquid discharges. In a distillation column, a weir is used to retain an amount of liquid on a sieve tray or plate. While the vapour enriched with the more volatile component rises up through the perforations on the sieve tray or plate, the liquid cascades over the weir into the downcomer to the tray below. The weir crest is the top of the weir over which the liquid flows. Geology and Earth Sciences An engineered structure extending across an open water channel. It is possible to calculate the volume of water flowing over a weir from a knowledge of its particular characteristics. Weirs are designed for flow measurement in a variety of shapes but the most common are the suppressed, contracted, V-notch, trapezoid, and broad-crested types. Other weirs may be used to control river water levels or divert flow into channels.
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