定义 中文名称： 临界压力比 英文名称： critical pressure ratio 定义： 在气动装置中当气流达到音速流动时上游绝对压力与下游绝对压力的比值。 应用学科： 机械工程（一级学科）； 传动（二级学科）； 气压传动（二级学科）
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critical pressure differential ratio 临界压差比
apparent critical pressure ratio 表观临界压强比
Finally, the new empirical formulas for calculating their critical pressure ratio were derived too.
探讨了篦齿的临界特性，提出了新的能够准确计算两类篦齿临界压比的经验公式。
With the critical pressure ratio of a single stage, that of the staging can also be obtained, and thus can supply data for the online calculating and diagnosis of the steam turbine.
在求出单级临界压比的基础上，可以计算出级组的临界压比，为在汽轮机变工况在线计算和故障诊断提供数据。
In the study of flow oscillation and discrete frequency noise of impinging jet, it is found that there is a critical pressure ratio for a given nozzle and a nozzle-to-plate distance.
为探索冲击射流离散频率噪声的产生机理，系统地研究了冲击射流离散频率噪声的特性。
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