Changes in Fluctuation Waves in Coherent Airflow Structures with Input Perturbation
Fuente:
arXiv
Salvato in:
| Autore principale: | |
|---|---|
| Natura: | Preprint |
| Pubblicazione: |
2024
|
| Soggetti: | |
| Accesso online: | |
| Tags: |
Aggiungi Tag
Nessun Tag, puoi essere il primo ad aggiungerne!!
|
| _version_ | 1866915103770673152 |
|---|---|
| author | Marzouk, Osama A. |
| author_facet | Marzouk, Osama A. |
| contents | We predict the development and propagation of the fluctuations in a perturbed ideally-expanded air jet. A non-propagating harmonic perturbation in the density, axial velocity, and pressure is introduced at the inflow with different frequencies to produce coherent structures in the airflow, which are synchronized with the applied frequency. Then, the fluctuations and acoustic fields are predicted for each frequency by integrating the axisymmetric linearized Euler equations. We investigate the effect of the perturbation frequency on different characteristics of the pressure and velocity waves. The perturbation frequency can be used to alter the propagation pattern and intensity of the waves and mitigate the noise levels at certain zones. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_08542 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Changes in Fluctuation Waves in Coherent Airflow Structures with Input Perturbation Marzouk, Osama A. Fluid Dynamics Numerical Analysis 76Q05, 76N15, 76M20, 76N25 J.2; J.6 We predict the development and propagation of the fluctuations in a perturbed ideally-expanded air jet. A non-propagating harmonic perturbation in the density, axial velocity, and pressure is introduced at the inflow with different frequencies to produce coherent structures in the airflow, which are synchronized with the applied frequency. Then, the fluctuations and acoustic fields are predicted for each frequency by integrating the axisymmetric linearized Euler equations. We investigate the effect of the perturbation frequency on different characteristics of the pressure and velocity waves. The perturbation frequency can be used to alter the propagation pattern and intensity of the waves and mitigate the noise levels at certain zones. |
| title | Changes in Fluctuation Waves in Coherent Airflow Structures with Input Perturbation |
| topic | Fluid Dynamics Numerical Analysis 76Q05, 76N15, 76M20, 76N25 J.2; J.6 |
| url | https://arxiv.org/abs/2410.08542 |