节流过程是不可逆过程,在过程中流体处于非平衡状态,没...
节流过程是不可逆过程,在过程中流体处于非平衡状态,没有确定的状态参数。但可研究节流前后流体处于平衡状态的情况。例如:离节流足够远的两个截面1、2处,那里的气体已为平衡状态。Throttling process is an irreversible process, in which the fluid is in a non-equilibrium state and there are no determined state parameters. However, the equilibrium state of fluid before and after throttling can be studied. For example, two sections 1 and 2 far enough away from the throttle, where the gas is in equilibrium. Pressure: p1>p2; Specific volume: v1<v2; velocity:> A、压力 :p1<p2<br> B、压力 :p1>p2
C、比体积:v1<v2<br> D、流速:w1<w2<br>