【作者】

Lei Shi,Kangyao Deng,Shaoming Wang,Chongmin Wu

【摘要】

论文已在中国上海举行的第27届CIMAC大会上发表。论文的版权归CIMAC所有。In order to achieve the optimum performance of the high load operation and the low load operation of an 8-cylinder marine diesel engine, this paper studied a newly designed variable geometry exhaust manifold (VGEM) turbocharging system bysimulation and experiment. The VGEM turbocharging system can switch the charging system between two charging modes by a controllable valve accord-ing to the engine load. The one-dimensional simulations of VGEM turbocharging system was developed for a marine eight-cylinder diesel engine using GT-POWER. The efects of the charging mode on engine performance were analyzed and the switch point wasfound according to the BSFC. The result showed that the switching point should be set at 70% load which could make the engine get optimum performance both at high and low load operation. The comparison of four-pulse, PC, MPC, and MIXPC turbocharging systems was studied respectively for this diesel engine. The simulation results indicated that the BSFC of the VGEM turbocharging system is always less than that of the four pulse, MPC, MIXPC turbocharging systems at all four loads of 25%50% 75%100%.

【会议名称】

第27届CIMAC会议

【会议地点】

上海

【下载次数】

1

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