船用二冲程柴油机鼓风机扫气模型与切换规律研究  

Research of Scavenging Model and Blower Switching for Two-Stroke Marine Diesel Engine

作　　者：石磊[1] 丰琳琳[2] 周涌明 邓康耀[1] 

机构地区：[1]上海交通大学动力机械及工程教育部重点实验室,上海200240 [2]泛亚汽车技术中心有限公司,上海201201 [3]沪东重机股份有限公司,上海200129

出　　处：《内燃机工程》2012年第5期31-35,40,共6页Chinese Internal Combustion Engine Engineering

基　　金：柴油机高增压技术国防科技重点实验室基金项目(9140C3307080802)

摘　　要：针对船用7K90MC-C低速二冲程柴油机进行了鼓风机匹配和切换规律的研究。建立了二冲程柴油机与鼓风机仿真模型,着重研究了扫气模型的选取。通过试验校核,验证了计算结果的正确性。对2台鼓风机全开时切换规律的研究表明:柴油机负荷增加时鼓风机应在41%负荷左右关闭,柴油机负荷降低时鼓风机应在35%负荷左右打开,可以保证控制扫气量和热负荷的需要。In order to solve the problem operating in low load range for two-stroke low-speed diesel engine, blowers were equipped to achieve high scavenge pressure. The scavenging model and blowers switching points were studied on 7K90MC-C two-stroke low-speed diesel engine. The engine model and blower model were developed. The simulation results were verified by the experimental results. The switching of blower was studied further. Results show that in order to reduce engine thermal load, the blowers should be cut-off near 41% load point in load increasing process and opened near 35% load point in load decreasing process.

关 键 词：内燃机 二冲程船用柴油机 增压系统 鼓风机 扫气模型 

分 类 号：TK421.8[动力工程及工程热物理—动力机械及工程]