Air-change rate的意思|示意

Air has a low density and great compressibility. The volumetric flow rate of air in air drilling varies with pressure and temperature, which in turn, change with WLL depth.

气体不仅密度低，而且具有很大的可压缩性，所以空气钻井的体积流量将随压力和温度变化，而压力和温度又随井深变化。

As a parachute canopy moves unsteadily through the air, its equations of motion must include the rate of change of momentum of the air in which it is immersed.

当降落伞在空气中作非定常运动时，空气动量的变化率必须包括在降落伞的运动方程中。

A reason for this is that RH buffering by materials is feeble and short lived compared with temperature buffering when the air change rate is large.

原因是当空气交换量大时，和热缓冲材料相比湿度缓冲材料的功能较弱，而且寿命不长。

This rate of change of momentum of the air is allowed for by apparent mass components, the magnitudes of which must be determined experimentally.

空气动量的变化率可用表观质量分量描述，这些分量的大小必须通过实验来确定。

Especially discusses the ways of choosing a proper air change rate.

讨论了换气次数的正确选取方法。

Regardless of hysteresis of air system, the main factor that influences dynamic response of fuel cell is diffusion concentration polarization, which restricts the change rate of stack current.

不考虑空气系统的时间滞后，影响电池动态响应时间的主要因素为扩散浓差极化，它限制了电流的变化率。