喘振曲线 meaning in English

stall curve

These means have following defects : i . parameter controls is too simple that will fit the curve too roughly and can ’ t give the configuration and characteristic of surge curve very good ; ii . the performance curve will change a lot when working condition changes , especially when woring temperature changes ; iii . choking area will bring huge waste and is an area that the system oughts to avoid , but we haven ’ t corresponding methods to watch and control it in the domestic till now
这些措施具有以下缺点: 1 、控制参数过于简单,对曲线的拟合过于粗糙,不能很好的反映喘振曲线的形态和特点; 2 、当工作条件变化时,特别是工作温度有所变化时,性能曲线会发生很大变化; 3 、阻塞区会造成巨大的浪费,也是系统该避免的区域,可是目前国内还没有相应措施来监控它。