ratio of pressure rise的意思|示意

The results show that DME operation has longer injection delay, lower maximum cylinder pressure, lower ratio of pressure rise, shorter ignition delay in comparison with diesel operation.

结果表明：与柴油相比，发动机燃用二甲醚时的喷油延迟期延长，滞燃期缩短，最高爆发压力和最大压力升高率均低于柴油机。

With increase of bed height, air pressure and power consumption rise, expansion ratio of the bed decreases, but the density stability and critical fluidized velocity of the bed are hardly changed.

随着床层高度的增加，所需风压及功率增大，膨胀率有所降低，而床层密度的稳定性和起始流化气速几乎不变。