Predictions and experimental studies of the tail pipe noise of an automotive muffler using a one dimensional CFD model

Yasuda, Takashi; Wu, Chaoqun; Nakagawa, Noritoshi; Nagamura, Kazuteru

doi:10.1016/j.apacoust.2010.03.001

Cited by 55 publications

(22 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In 2010, By using 1D CFD model, Yasuda, Takashi,Wu, Chaoqun,Nakagawa, Noritoshi and Nagamura, Kazuteru [18] simulate the tail pipe noise of a automotive exhaust muffler. After measuring the transient acoustic characteristics of the exhaust muffler, they find the simulation fit the experiment very well at the 2nd order of the engine rotational frequency, while it is different at the high order of engine speed.…”

Section: B Beyond Chinamentioning

confidence: 99%

Research about intake and exhaust mulffer: A review

Zhao

2011

2011 Second International Conference on Mechanic Automation and Control Engineering

View full text Add to dashboard Cite

This paper provides an overview of research on intake and exhaust muffler in the past 3 years. First, a detailed introduction to the basic noise theory of intake and exhaust muffler is given. And then, the status quo of research on inlet and exhaust muffler is in focus in the past 3 years. Finally, a summary on the research status and prospect of research focus in the future is discussed. Keywords-review, intake muffler, exhaust muffler, status quoI.

show abstract

Section: B Beyond Chinamentioning

confidence: 99%

Research about intake and exhaust mulffer: A review

Zhao

2011

2011 Second International Conference on Mechanic Automation and Control Engineering

View full text Add to dashboard Cite

show abstract

“…Meanwhile, the axial position of the measuring point with exhaust port flow ought to be ensured as 45°and the distance 0.5 m. Finally, a special sound insulation board is used to ensure measurement point from the effects of other noises nearby, and the relative position of measurement point and exhaust port should always be kept the same. 23 From the acoustic analysis above, it is concluded that the acoustic attenuation frequencies with the best effect of the reactive muffler are between 31.5 and 3000 Hz, which has good reference value. So this test mainly acquires the signal at the frequencies between 31.5 and 3000 Hz; meanwhile, the sound level at the central frequency is recorded; when the engine is operated under full load, the speed ranges from 1400 to 2600 r min 21 and increases progressively with 200 r min 21 .…”

Section: Measurement Of Muffler Ilmentioning

confidence: 99%

Modification of exhaust muffler of a diesel engine based on finite element method acoustic analysis

Wei

Tang

et al. 2015

Advances in Mechanical Engineering

View full text Add to dashboard Cite

In order to improve the acoustic attenuation performance of an exhaust muffler of a 175 series of agricultural diesel engine, automatic matched layer method of finite element is adopted on the basis of LMS Virtual.Lab software to simulate the non-reflecting boundary conditions, which can avoid the complex calculation and then figure out the value of propagated sound power directly and finally obtain the transmission loss of the exhaust muffler. Compared with the experimental data, it can be found that the error between the simulation and measured values is small, and it can be accurately simulated for the acoustic performance of the exhaust muffler at the frequencies smaller than 3000 Hz, which verifies the validity of the acoustic solution. An improved design that properly distributes the insertion length of intubation, increases the length-diameter ratio, and adds the length of the first expansion cavity is proposed for the poor acoustic attenuation performance in low and medium frequencies. Compared with the original design, the transmission loss value at low and medium frequencies obviously increases, so the acoustic attenuation performance at the frequencies becomes better.

show abstract

“…He took into consideration different functional requirements of muffler like style, shape, size, cost, desired sound, durability, backpressure and adequate insertion loss [7]. The experimental and numerical study had performed for the tailpipe noise of a muffler for a wide range of throttle acceleration [6]. Thevalidation was done for the transient acoustic characteristics of a muffler in theanechoic chamber according to the Japanese Standard (JIS D 1616).…”

Section: Need For Analysismentioning

confidence: 99%