Study on the Influence of Intercooler Pressure Drop on the Performance of Marine Successively Supercharged Diesel Engines
The application of sequential turbocharging technology can balance the performance indicators of medium-and high-speed marine diesel engines at low and high speeds,making up for the deficiencies of ordinary turbocharging technology when the engine speed span is large.However,during the implementation of this technology,other components of the engine intake system may still have an impact on various performance indicators of the engine.This article studies the impact of intercooler pressure drop on engine performance through endurance testing on a 16V marine sequential turbocharged diesel engine.The results show that as the pressure drop of the intercooler increases,the intake air flow decreases,resulting in an increase in the fuel consumption rate,smoke density,and exhaust temperature before the turbine of the engine.At the same time,the operation of the turbocharger compressor is gradually approaching the surge region,which significantly increases the risk of surge in the turbocharger and has a great impact on the economy,emissions,power and reliability of the engine.Therefore,during the operation of the engine,it is necessary to monitor the pressure drop before and after the intercooler,and regularly maintain and repair the intercooler.If necessary,it needs to be replaced.
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