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8V165/155发动机原采用脉冲增压系统,当P_e提高到13～14公斤/厘米~2时,在高速情况下,燃油耗量和排气温度偏高。通过对8V165/155发动机配气相位的分析可知:排气管的每一分支管系中都有相当大的排气间歇期,因而涡轮是在部分进气的条件下工作,降低了涡轮效率。为了克服这一缺点,提出改用脉冲转换增压系统的建议,并进行了试验研究。试验证明,改用脉冲转换增压系统后,整机性能有明显改善。在相同G_T情况下,空气流量增加,功率提高,比油耗下降,排气温度和喘振转速也随之下降。通过对排气压力波的计算,证实涡轮效率有较大幅度提高。
8V165 / 155 engine original pulse pressurization system, when P_e increased to 13 ~ 14 kg / cm ~ 2, at high speed, the fuel consumption and exhaust temperature is high. Through the 8V165 / 155 engine gas phase analysis shows that: each branch of the exhaust pipe system has a considerable exhaust intermittent period, and thus the turbine is part of the intake conditions, reducing turbine efficiency. In order to overcome this shortcoming, the suggestion of switching to the impulse conversion booster system is put forward and the experimental research is carried out. Test proved that the switch to the pulse conversion booster system, the overall performance has significantly improved. In the same G_T case, the air flow rate increases, the power is increased, the fuel consumption is reduced, the exhaust temperature and the surge speed also decrease. Through the calculation of exhaust pressure wave, turbine efficiency has been confirmed to have greatly improved.