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尽管焓在自然科学、工程热物理和热能工程中是使用十分广泛的物理参量,但其物理意义却是不够清楚的。本文首先评价了已有的一些关于焓的物理意义的论点,然后论述并发挥了作者以前论述过的焓中的pv是在压力场为定常时,流体微团在其迹线上的压力势能的观点。为此,需涉及到体系的势能与外力场对体系作功的关系,以及流体微元体在流场中运动时,流场对此微元体的作功关系的定量概念。通过以上论述,以期对探讨焓的物理意义有所帮助。
Although the enthalpy is widely used in the physical sciences, engineering thermophysics and thermal engineering, its physical meaning is not clear enough. This paper first evaluates some of the existing arguments about the physical meaning of enthalpies and then discusses and exerts the pv of the enthalpy previously discussed by the author as the pressure potential of the fluid micelles on its trace when the pressure field is constant View. Therefore, it is necessary to relate the relationship between the potential energy of the system and the work force of the external force field and the quantitative concept of the working relationship between the flow field and the micro-bodies when the fluid micro-bodies move in the flow field. Through the above discussion, in order to explore the physical meaning of enthalpy helpful.