Report
Large-eddy simulation for the aero-vibro-acoustic analysis: plate-cavity system excited by turbulent channel flow
| العنوان: | Large-eddy simulation for the aero-vibro-acoustic analysis: plate-cavity system excited by turbulent channel flow |
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| المؤلفون: | Zhu LX(朱力行), Wu T(吴霆), He GW(何国威) |
| المساهمون: | He, GW (corresponding author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China. |
| سنة النشر: | 2022 |
| المجموعة: | IMECH-IR (Institute of Mechanics, Chinese Academy of Sciences) / 中国科学院力学研究所机构知识库 |
| مصطلحات موضوعية: | Large-eddy simulation, Turbulent flow, Aero-vibro-acoustics, Surface pressure, Engineering, Mechanical, Mechanics, 二类 |
| الوصف: | The large-eddy simulation (LES) with the dynamic Smagorinsky model is used to predict the interior sound of an idealized vehicle cabin under the excitation of the wall pressures from turbulent channel flows. In comparison with direct numerical simulation (DNS), the LES results overpredict the sound pressure level (SPL) at low frequencies and underpredict the SPL at high frequencies. The incorrect predictions result from the incorrect prediction of LES on surface pressures, where the LES over-estimates the wavenumber and frequencies spectra of surface pressures at small wavenumbers and frequencies and under-estimates the spectra at large wavenumbers and frequencies. However, the LES results are close to the filtered-DNS results, implying that the unresolved scales are also important to surface pressures and interior sound. The Euler-Bernoulli beam under the excitation of exterior pressures, which serves as a simple model for aero-vibro-acoustics in the case of hydrodynamical fast, is used to explain the observed predictions and show that the Corcos model cannot represent the variation of turbulence pressure spectra at wavenumbers and frequencies. Therefore, the new requirement for the LES method, when applied to fluid-structural-acoustic interaction problems at high Reynolds numbers, is the correct prediction of wavenumber and frequency spectra of turbulence wall pressure. |
| نوع الوثيقة: | report |
| اللغة: | English |
| Relation: | ACTA MECHANICA SINICA; http://dspace.imech.ac.cn/handle/311007/90137 |
| DOI: | 10.1007/s10409-022-22019-8 |
| الاتاحة: | http://dspace.imech.ac.cn/handle/311007/90137 https://doi.org/10.1007/s10409-022-22019-8 |
| Rights: | cn.org.cspace.api.content.CopyrightPolicy@124b2fa3 |
| رقم الانضمام: | edsbas.4BCA62B7 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1007/s10409-022-22019-8 |
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