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作为消声降噪的主要设备,排气消声器不仅要保证一定的消声性能,还要尽量减少压力损失。发动机的功率损失与压力损失息息相关,因此设计消声器时必须控制压力损失的大小。影响消声器压力损失的因素有很多,比如消声器结构、入口流速、温度等。利用计算流体力学方法分析消声器内部流场分布,探讨不同结构因素下压力损失的变化关系,对于消声器的设计开发具有指导意义。
As a major noise reduction equipment, exhaust muffler not only to ensure a certain degree of muffler performance, but also to minimize pressure loss. Engine power loss and pressure loss are closely related, so the design of the muffler must control the size of the pressure loss. Affect the muffler pressure loss of many factors, such as muffler structure, inlet flow rate, temperature and so on. The use of computational fluid dynamics method to analyze the distribution of flow field inside the muffler to explore the relationship between pressure loss under different structural factors, which is instructive for the design and development of the muffler.