Authors

Abstract

Based on the split-stream rushing principle and multi-unit coupling theory, a new type of coupled muffler for diesel engine was designed, and the experimental study on the acoustic performance and exhaust resistance performance was completed. The results show that the growth rate of insertion loss of the coupled muffler within 200Hz is 34.01% compared to the original muffler. The average fuel consumption reduction rate of the diesel engine with the coupled muffler is 19.16% lower than that of the original muffler. Therefore, the coupled muffler can achieve the comprehensive goal of good acoustic performance and low exhaust resistance.

Abstract in Chinese

依据分流气体对冲原理和分级耦合理论设计了一种柴油机新型耦合消声器，完成了声学性能和排气阻力性能的试验研究。结果显示，耦合消声器在200Hz内插入损失相对于原机消声器的增长率为34.01%。柴油机安装新型消声器后相比原机消声器的平均油耗降低率为19.16%。耦合消声器通过降低消声器内气流速度可以实现声学性能好且排气阻力低的综合目标。