Abstract
Turbocharger matching is a rather difficult task during design of highly rated diesel engines, especially for marine application. The sequential turbocharging (STC) technique is used to improve the performance of highly rated diesel engines in particular at part loads, the paper introduces the working principle of the sequential turbocharging system. To improve the performance of the TBD234V12 diesel engine, a STC system of four turbochargers and two unequal turbochargers for the diesel engine was designed. Experimental research was done on this improved marine diesel engine. Then, a 3-phase STC system is presented by analyzing and comparing the test result and the switching boundary of this system is confirmed. The test results show that the part-load performance is improved obviously by using of four turbochargers and two unequal turbochargers STC system.
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