In order to ensure the uniformity of the air intake of the two side intercoolers when changing the number of working turbo-chargers in a V-type sequential turbocharged diesel engine,multiple rounds of design and CFD simulation optimization were conducted on the air intake system of a certain marine sequential turbocharged diesel engine.During this process,the uniformity of air flow distri-bution on both sides,the uniformity of air flow velocity in the air intake section of the intercooler,and the pressure drop condition were emphatically evaluated under single turbocharging and triple turbocharging modes.After structural optimization,the maximum deviation of air flow on both sides was only 0.23％,and the minimum value of uniformity index of air flow velocity in the air intake section of both side intercoolers reached 0.883.The maximum pressure drop of the gas collection chamber and the intercooler end cover was 18.2kPa,which was at a relatively optimal level.Subsequently,experimental verification was also conducted,and the results showed that under different turbocharging modes,the uniformity trend of air intake on both sides was in line with simulation results,meeting practical use requirements.
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