针对某船用增压柴油机，对其进行相继增压（STC）系统进、排气管路，排烟管和气动蝶阀控制系统的设计与改造。通过试验，研究了在推进特性工况下，采用1TC和2TC对柴油机燃烧和排放性能的影响。结果表明，采用STC系统相比原机常规增压在低工况（P≤40%Pe）时可以达到提高柴油机动力性，降低燃油消耗率，减少NOx和Soot浓度的目的。其中，最高燃烧压力在10%Pe相比原机增长幅度约为21.2%，燃油消耗率下降约4.7%，而NOx浓度最大降低率约为22.92%，Soot浓度最大减小率约为48.83%。
For a marine supercharged diesel engine, the design and improvement of the sequential supercharging (STC) system inlet and exhaust pipes, exhaust pipe and pneumatic butterfly valve control system are carried out successively. Based on practical tests of the effects of 1TC and 2TC on the combustion and emission performance of diesel engine under the propulsion characteristics were studied. The test results show that compared with the conventional pressurization of the original machine, adopting the STC system can achieve the purposes of improving diesel engine power, reducing fuel consumption rate and reducing NOx and Soot concentration in low working conditions (P ≤ 40% Pe). Moreover, the maximum combustion pressure increases by about 21.2% compared with the original machine. The fuel consumption rate reduces by about 4.7%. The maximum reduction rate of NOx concentration is about 22.92%, and the maximum reduction rate of Soot concentration is about 48.83%.
2019,41(10): 139-143 收稿日期：2018-10-19
DOI：10.3404/j.issn.1672-7649.2019.10.027
分类号：TK421
基金项目：福建省自然科学基金资助项目（201J01705）；
作者简介：王尚鹏(1995-),男,硕士研究生,研究方向为内燃机性能与增压
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