某特种废气旁通式涡轮增压柴油机功率提升分析

针对某特种柴油机在特殊环境工作时存在进气不足、排气受阻、燃烧恶化、排温升高、功率及燃油经济性下降严重等问题,提出匹配废气旁通式涡轮增压系统的方案。基于GT-Power平台构建了该特种柴油机一维性能仿真模型,并进行试验标定;在此基础上对废气旁通式涡轮增压系统进行了匹配仿真分析并试验验证。结果表明:该特种柴油机匹配废气旁通式涡轮增压系统后可达到功率提升10%的要求,同时,涡前排温和最高燃烧压力均满足限制条件。

Power Raising Analysis of a Special Diesel Engine WithExhaust Bypass Turbocharging System

In particular environment, a special diesel engine had the problems of insufficient intake, blocked exhaust, worsening combustion and high exhaust temperature, which led to serious decline in power and fuel economy. To solve these problems, the exhaust bypass turbocharging system was proposed as the solution. The GT-Power software was used to construct the one-dimensional simulation model of the special diesel engine, and the model was calibrated by test. On this basis, the matching simulation analysis of the exhaust bypass turbocharging system was carried out and demonstrated by experiments. The results show that the exhaust bypass turbocharging system can realize diesel engine power improvement of 10%, and both the temperature in front of turbine and the maximum combustion pressure are within the limits.