摘要
阻力系数是衡量消声器空气动力性能的一个重要指标,阐述阻抗复合消声器的结构和特点,建立消声器模型,利用三维计算流体力学(CFD)方法计算阻力系数,并用实际测量进行验证,证明计算方法可行.分析了空气流速和膨胀腔长度、穿孔率、穿孔直径等消声器结构对阻力系数的影响,得出在相同流速下,消声器阻力系数越小,压力损失越小,其空气动力性能越好,为消声器的优化设计提供参考.
Resistance coefficient is an important indicator to measure the aerodynamic performance of the muf- fler. The impedance-compound muffler structure and its characteristics were analyzed, and the muffler model was set up. By using three dimensional computational fluid dynamics （CFD）, the resistance coefficient was calculat- ed and compared with the actual measurement, which proved the feasibility of the calculating method. This paper also analyzed the influence on the resistance coefficient of muffler of the air flow rate and cavity length, perforated ratio, perforated diameter. Obtained at the same velocity, the muffler resistance coefficient is smaller, and the smaller the pressure loss, the better the aerodynamic performance. This provides a reference for optimum design of muffler.
出处
《动力学与控制学报》
2015年第3期235-240,共6页
Journal of Dynamics and Control
关键词
消声器
空气动力性
压力损失
阻力系数
CFD
muffler, air power performance, pressure loss, resistance coefficient, CFD
