2D Aeroacoustic Analysis of Flow in the Flame Trench
| العنوان: | 2D Aeroacoustic Analysis of Flow in the Flame Trench |
|---|---|
| المؤلفون: | Pokorski, Meghan |
| تفاصيل مُضافة: | Mankbadi, R. R., advisor Embry-Riddle Aeronautical University. Department of Aerospace Engineering. Pokorski, Meghan |
| Call Numbers: | TL785.8.L3 P65 2016eb |
| وصف مادي: | 1 online resource (xii, 82 leaves) : color illustrations |
| مستخلص: | We present here a methodology for using the commercial software ANSYSFLUENT to predict the acoustic field associated with Space-Launch System (SLS). We consider a two-dimensional model of flame deflector, and flame trench. The ANSYS code is then used to simulate the internal flow. Both the steady state case is considered along with other cases where the inflow has a harmonic component. A Ffowcs-Williams Hawking (FWH) surface is then constructed within the computational domain to use the computed flow fluctuations to obtain the acoustic field. The acoustic data was then compared to the experimental data. When using the ANSYS code for this flow situation, the residuals did not converge but reached an asymptotic oscillatory state. The fluctuation in the residual is too large to consider the computed flow fluctuations to be the sound source. Therefore, the results should be interpreted with caution as a first-attempt preliminary results. However, the calculated sound field qualitatively resembles the experimental observations. This may support the need to address the conversion issue and the need to extend the approach to the realistic three-dimensional case. |
| الموضوعات: | Launch vehicles (Astronautics) Noise., Launch vehicles (Astronautics) Testing., Computational fluid dynamics., Lanceurs (Astronautique) Bruit., Dynamique des fluides numérique., Computational fluid dynamics |
| مصطلحات الفهرس: | Aerodynamics and Fluid Mechanics, Aeronautical Vehicles, Aerospace Engineering |
| URL: | |
| الإتاحة: | Open access content. Open access content |
| ملاحظة: | Also available in print. "Daytona Beach, Florida, May 2016." Includes bibliographical references (leaf 82). 1. Introduction. 1.1. Motivation ; 1.2. Previous impinging jet modeling ; 1.3. Objective -- 2. Numerical models. 2.1. Geometry ; 2.2. Computational mesh. 2.2.1. Grid study ; 2.3. Fluent models ; 2.4. Ffowcs Williams-Hawkings methods -- 3. Benchmark experiment -- 4. Results. 4.1. Steady base flow. 4.1.1. Laminar flow ; 4.1.2. Turbulent flow ; 4.2. Unsteady flow. 4.2.1. Flow behavior ; 4.2.2. Flow snapshots ; 4.3. Acoustic field. 4.3.1. Frequency at Ffowcs Williams-Hawkings surfaces ; 4.3.2. Acoustic locations ; 4.3.3. Acoustic data comparison -- 5. Conclusion ; 6. Recommendations ; References. |
| أرقام أخرى: | FER oai:commons.erau.edu:edt-1231 1014343495 |
| المصدر المساهم: | From OAIster®, provided by the OCLC Cooperative. |
| رقم الأكسشن: | edsoai.on1014343495 |
| قاعدة البيانات: | OAIster |
| الوصف غير متاح. |