The investigation shows the performance gets quite insensitive to the prewhirl angle of igv as the stagger angle of diffuser vane is reduced to the minimum 7 ; the combination of these two stators enables to greatly improve the compressor efficiency over the entire operating rage , the maximum efficiency with the combined adjustment reaches 86 . 0 % , higher than that in alone adjustment of igv or diffuser vanes by 2 % 研究表明:擴(kuò)壓器進(jìn)口安裝角最小值為7時(shí),壓縮機(jī)性能對進(jìn)口導(dǎo)葉預(yù)旋角不敏感;采用不同的擴(kuò)壓器進(jìn)口安裝角和不同進(jìn)口導(dǎo)葉預(yù)旋角匹配調(diào)節(jié)時(shí),壓縮機(jī)所能達(dá)到的最高效率為86 . 0 % ,比單獨(dú)調(diào)節(jié)進(jìn)口導(dǎo)葉預(yù)旋角或擴(kuò)壓器進(jìn)口安裝角所能達(dá)到的效率高2 % 。