进气结构对扫气性能的影响机理研究  

The Influence Mechanism of Intake Structure on Scavenging Performance

作　　者：王增全[1] 梁永森[1] 王文晓 李红 石达宇 WANG Zengquan;LIANG Yongsen;WANG Wenxiao;LI Hong;SHI Dayu(National Key Laboratory of Vehicle Power System,China North Engine Research Institute,Tianjin 300400,China;Department of Propulsion System Technology,China North Vehicle Research Institute,Beijing 100072,China)

机构地区：[1]中国北方发动机研究所车用动力系统全国重点实验室,天津300400 [2]中国北方车辆研究所推进系统技术部,北京100072

出　　处：《兵工学报》2024年第S02期65-72,共8页Acta Armamentarii

摘　　要：为探究多种进气结构对扫气性能的影响,基于进气口壁厚、进气口形状、进气口偏移量、进气口数量4种气口结构参数,开展正交试验。试验结果表明:直流扫气对置活塞二冲程柴油机的进气结构通过影响进气气流的旋流强度和流通阻力对综合性能产生影响;通过改变进气结构的进气倾角、斜面长度、斜面宽度对进气气流的旋流强度进行调整;通过改变进气结构的进气倾角、总气口接触面对流通阻力产生影响;改变进气旋流强度可以调整扫气性能,改变进气流通阻力可以抑制废气回流。研究发现进气口壁厚为调节对置活塞二冲程柴油机扫气性能的显著因素。In order to explore the influence of various inset structures on scavenging performance,the orthogonal test of inset structure is carried out based on four inset structural parameters,namely,inlet wall thickness,inlet shape,inlet offset and number of inlets.The test results show that:the intake structure of a uniflow scavenging opposed-piston two-stroke diesel engine affects the overall performance of engine by influencing the swirl strength and flow resistance of intake air.The swirl intensity of the intake stream is adjusted by changing the inclination angle,the length and width of inclined plane of the intake structure.The total inlet contact surface affects the flow resistance by changing the intake angle of intake structure.The scavenging performance can be adjusted by changing the inlet flow intensity,and the exhaust gas backflow can be inhibited by changing the inlet flow resistance.It is found that the inlet wall thickness is a significant factor for regulating the scavenging performance of a opposed-piston two-stroke diesel engine.

关 键 词：二冲程柴油机 扫气性能 进气结构 正交试验 

分 类 号：TK421[动力工程及工程热物理—动力机械及工程]