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单词 Uniflow steam engine
释义

Uniflow steam engine

英语百科

Uniflow steam engine

Schematic animation of a uniflow steam engine.The poppet valves are controlled by the rotating camshaft at the top. High pressure steam enters, red, and exhausts, yellow.
 Galloway uniflow steam engine, now in Thinktank, Birmingham Science Museum

The uniflow type of steam engine uses steam that flows in one direction only in each half of the cylinder. Thermal efficiency is increased in the compound and multiple expansion types of steam engine by separating expansion into steps in separate cylinders; in the uniflow design, thermal efficiency is achieved by having a temperature gradient along the cylinder. Steam always enters at the hot ends of the cylinder and exhausts through ports at the cooler centre. By this means, the relative heating and cooling of the cylinder walls is reduced.

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更新时间:2025/6/21 9:25:42