MODELING OF N-BRANCH JUNCTIONS AND UPSTREAM ACOUSTICAL EXCITATION IN THE SILENCERS OF INTERNAL COMBUSTION ENGINES

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FAEZIAN A.; MODARES RAZAVI M.R.; ONORATI A.

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Journal: JOURNAL OF SCHOOL OF ENGINEERING Year:2004 | Volume:16 | Issue:2 (Machanical Engineering Issue) Page(s): 163-180

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Title

MODELING OF N-BRANCH JUNCTIONS AND UPSTREAM ACOUSTICAL EXCITATION IN THE SILENCERS OF INTERNAL COMBUSTION ENGINES

Author(s)

FAEZIAN A. | MODARES RAZAVI M.R. | ONORATI A. | Issue Writer Certificate

Keywords

BRANCHQ4

EXCITATIONQ4

PURE TONEQ4

WHITE NOISEQ4

ACOUSTICQ4

SILENCERQ4

Abstract

In this work, boundary conditions of T-junctions in engine SILENCERs are modeled by constant pressure model (CPM) and pressure loss model (PLM). The mean flow velocity through the ducts is zero. Two Benson CPM and Corberan CPM approaches are employed in perforate SILENCERs simulation. For the SILENCER with more than one perforated pipe which appears as NBRANCH junctions, it is possible to apply the Benson CPM approach. The upstream EXCITATION as a boundary condition is modeled by two single PURE TONE (harmonic) and WHITE NOISE perturbations. It is shown that WHITE NOISE perturbation bring enough accuracy. On the other hand -it spends much shorter time than single PURE TONE perturbation.

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References

MODELLING OF EXHAUST SYSTEM SILENCERS IN INTERNAL COMBUSTION ENGINES

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APA: Copy

FAEZIAN, A., MODARES RAZAVI, M.R., & ONORATI, A.. (2004). MODELING OF N-BRANCH JUNCTIONS AND UPSTREAM ACOUSTICAL EXCITATION IN THE SILENCERS OF INTERNAL COMBUSTION ENGINES. JOURNAL OF SCHOOL OF ENGINEERING, 16(2 (Machanical Engineering Issue)), 163-180. SID. https://sid.ir/paper/22602/en

Vancouver: Copy

FAEZIAN A., MODARES RAZAVI M.R., ONORATI A.. MODELING OF N-BRANCH JUNCTIONS AND UPSTREAM ACOUSTICAL EXCITATION IN THE SILENCERS OF INTERNAL COMBUSTION ENGINES. JOURNAL OF SCHOOL OF ENGINEERING[Internet]. 2004;16(2 (Machanical Engineering Issue)):163-180. Available from: https://sid.ir/paper/22602/en

IEEE: Copy

A. FAEZIAN, M.R. MODARES RAZAVI, and A. ONORATI, “MODELING OF N-BRANCH JUNCTIONS AND UPSTREAM ACOUSTICAL EXCITATION IN THE SILENCERS OF INTERNAL COMBUSTION ENGINES,” JOURNAL OF SCHOOL OF ENGINEERING, vol. 16, no. 2 (Machanical Engineering Issue), pp. 163–180, 2004, [Online]. Available: https://sid.ir/paper/22602/en

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