【摘要】 为研究二级增压系统中高低两级压气机性能与系统的整体性能,匹配了一套二级增压系统.建立了专门的二级增压系统试验台架,针对每一条试验曲线,将高低两级增压器调节到某一稳定转速,进行二级压气机性能试验.试验结果表明,高压级压气机的折合流量与实际流量差别很大,为便于了解二级增压系统的实际增压效果,宜采用实际流量;在大部分工况下压比分配为1∶1时,所匹配的二级增压系统效率较高;两级增压器转速较低时能达到很高的增压压力,保证了系统的安全性与可靠性.更多还原

【Abstract】 In order to study the performances of the high & low stage compressors and that of the system as a whole,a two-stage turbocharging system was matched,and a special two stage turbocharging system test bench was set up.For each test curve,the speeds of the two stage turbochargers were adjusted to some fixed data,and the compressor performance experiment carried out.The results showed that,there is much difference between the corrected mass flow and actual mass flow of the high stage compressor.In order to find out the actual supercharging effect of the two stage turbocharging system,it is better to adopt the actual mass flow. The two stage turbocharging system has much higher efficiency under most operating conditions if the pressure ratio assignment is 1∶1.The system can get very high supercharging pressure when the speeds of the two stage turbochargers are rather low,which ensures the system’s security and reliability.更多还原