For improve thrust loading and decrease fuel consume of the engine, propulsive system of the future demand the compressor in possession of higher pressure ratio and more efficiency.
未来飞机推进系统要求压气机的压比和效率均大大高于目前的使用水平，以提高发动机推重比，减小燃油消耗。
This thesis investigated transonic cascade of a certain compressor in order to increase the static pressure ratio of the cascade and reduce the coefficient of the cascade losses.
本课题以某型压气机的跨音速叶栅为研究平台，以提高叶栅静压增压比，减少叶栅流动损失为目标。
At the same time, from the energy consumption perspective, the user more not concerned with the air compressor shaft power energy consumption, but the input power than the energy consumption ratio.
同时，从能耗角度上讲，用户更关心的不是空压机轴功率的能耗比，而是输入功率的能耗比。
The overall performance for NASA 37 low-aspect ratio compressor stage at 70% design rotating speed was obtained and the internal flow fields at typical operating conditions were emphatically analyzed.
计算得到了NASA37号低展弦比、跨音速轴流压气机级70％设计转速下的全工况性能曲线，并重点分析了其中一些典型工况下的内部流场。
Copeland flexible vortex type compressor has low energy consumption, high quality, liquid strike prevention, and high energy efficiency ratio.
高品质、低能耗的谷轮柔性涡漩式压缩机。防液击，高能效比。
It turns out that the step structure of the scroll compressor has much greater internal volume ratio than original structure.
阶梯式结构的涡旋压缩机的结构内容积比比等高结构的要大得多。
The compression work or the total pressure ratio of a compressor is determined through the use of cascade element performance data concerning deviation Angle.
压气机的加功量或增压比由其基元叶栅的落后角确定。
The COP of the system also can be increased by using efficient compressor with low compression ratio.
采用特殊设计的在低压比下高效运行的压缩机，能够大幅提高系统的性能系数；
The influences of key design and operating parameters, such as bypass air ratio, compressor speed and total air mass flow rate etc.
分析了空气旁通率、压缩机转速及空气质量流量等主要设计及运行参数对干燥性能的影响。
But it has smaller volume than displacement compressor at the same mass flow rate; and higher pressure ratio and efficiency than impeller compressor.
且尺寸体积远小于同流量的容积式压缩机，稳定性和压比也比同流量的条件下的叶轮式压气机有所提高。
The method used to determine volume-reduction ratio for scroll compressor with modified profile is proposed. Formula for compression pockets and volume-reduction ration are given.
提出了一种修正型线涡旋压缩机内容积比的确定方法，给出了压缩腔容积和内容积比计算公式。
The influences of key design and operating parameters, such as bypass air ratio, compressor speed and total air mass flow rate etc. , on the performance of heat pump microwave drier were investigated.
分析了空气旁通率、压缩机转速及空气质量流量等主要设计及运行参数对干燥性能的影响。
Finally, with the air of freedom multiplied by the number of air compression ratio that the pressure can be drainage, to determine choose which kind of air compressor.
最终，用自由空气的数量乘以空气的压缩比即可得出排水所需的压力，以确定选择哪种空压机。
The discharge temperature can be controlled by providing the compressor with a pressure ratio selected to provide a desired discharge temperature.
所述排出温度可以通过提供具有一定压缩比的压缩机而控制，所述压缩比选择成提供所需排出温度。
The impact of injected steam temperature on compressor pressure ratio is relative…
低工况时，水蒸气的注入使涡轮的折合流量、膨胀比皆增大；
The impact of injected steam temperature on compressor pressure ratio is relative…
低工况时，水蒸气的注入使涡轮的折合流量、膨胀比皆增大；
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