Jet Oscillation Frequency Characterization of a Sweeping Jet Actuator
The time-resolved flow field of a spatially oscillating jet emitted by a sweeping jet (SWJ) actuator is investigated numerically using three-dimensional Reynolds-averaged Navier–Stokes (3D-URANS) equations. Numerical simulations are performed for a range of mass flow rates providing flow conditions...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2020-05-01
|
| Series: | Fluids |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2311-5521/5/2/72 |
| _version_ | 1797568053990391808 |
|---|---|
| author | Furkan Oz Kursat Kara |
| author_facet | Furkan Oz Kursat Kara |
| author_sort | Furkan Oz |
| collection | DOAJ |
| description | The time-resolved flow field of a spatially oscillating jet emitted by a sweeping jet (SWJ) actuator is investigated numerically using three-dimensional Reynolds-averaged Navier–Stokes (3D-URANS) equations. Numerical simulations are performed for a range of mass flow rates providing flow conditions varying from incompressible to subsonic compressible flows. After a detailed mesh study, the computational domain is represented using two million hexagonal control volumes. The jet oscillation frequency is predicted by analyzing velocity time histories at the actuator exit, and a linear relationship between the jet oscillation frequency and time-averaged exit nozzle Mach number is found (<inline-formula> <math display="inline"> <semantics> <mrow> <mi>f</mi> <mo>=</mo> <mn>511.22</mn> <mtext> </mtext> <mi>M</mi> <mo>+</mo> <mn>46.618</mn> </mrow> </semantics> </math> </inline-formula>, <i>R² =</i> 0.97). The results of our numerical model are compared with data from the literature, and a good agreement is found. In addition, we confirmed that the Strouhal number is almost constant with the Mach number for the subsonic oscillating jet and has an average value of <i>St</i> = 0.0131. The 3D-URANS model that we presented here provides a computationally inexpensive yet accurate alternative to the researchers to investigate jet oscillation characteristics. |
| first_indexed | 2024-03-10T19:50:55Z |
| format | Article |
| id | doaj.art-c819c71ba7764c8da05d652dc8a2f227 |
| institution | Directory Open Access Journal |
| issn | 2311-5521 |
| language | English |
| last_indexed | 2024-03-10T19:50:55Z |
| publishDate | 2020-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Fluids |
| spelling | doaj.art-c819c71ba7764c8da05d652dc8a2f2272023-11-20T00:27:12ZengMDPI AGFluids2311-55212020-05-01527210.3390/fluids5020072Jet Oscillation Frequency Characterization of a Sweeping Jet ActuatorFurkan Oz0Kursat Kara1School of Mechanical and Aerospace Engineering, Oklahoma State University, Stillwater, OK 74078, USASchool of Mechanical and Aerospace Engineering, Oklahoma State University, Stillwater, OK 74078, USAThe time-resolved flow field of a spatially oscillating jet emitted by a sweeping jet (SWJ) actuator is investigated numerically using three-dimensional Reynolds-averaged Navier–Stokes (3D-URANS) equations. Numerical simulations are performed for a range of mass flow rates providing flow conditions varying from incompressible to subsonic compressible flows. After a detailed mesh study, the computational domain is represented using two million hexagonal control volumes. The jet oscillation frequency is predicted by analyzing velocity time histories at the actuator exit, and a linear relationship between the jet oscillation frequency and time-averaged exit nozzle Mach number is found (<inline-formula> <math display="inline"> <semantics> <mrow> <mi>f</mi> <mo>=</mo> <mn>511.22</mn> <mtext> </mtext> <mi>M</mi> <mo>+</mo> <mn>46.618</mn> </mrow> </semantics> </math> </inline-formula>, <i>R² =</i> 0.97). The results of our numerical model are compared with data from the literature, and a good agreement is found. In addition, we confirmed that the Strouhal number is almost constant with the Mach number for the subsonic oscillating jet and has an average value of <i>St</i> = 0.0131. The 3D-URANS model that we presented here provides a computationally inexpensive yet accurate alternative to the researchers to investigate jet oscillation characteristics.https://www.mdpi.com/2311-5521/5/2/72sweeping jet actuatorjet oscillation frequencycompressibility effectunsteady Reynolds-averaged Navier–Stokesmass flow rate |
| spellingShingle | Furkan Oz Kursat Kara Jet Oscillation Frequency Characterization of a Sweeping Jet Actuator Fluids sweeping jet actuator jet oscillation frequency compressibility effect unsteady Reynolds-averaged Navier–Stokes mass flow rate |
| title | Jet Oscillation Frequency Characterization of a Sweeping Jet Actuator |
| title_full | Jet Oscillation Frequency Characterization of a Sweeping Jet Actuator |
| title_fullStr | Jet Oscillation Frequency Characterization of a Sweeping Jet Actuator |
| title_full_unstemmed | Jet Oscillation Frequency Characterization of a Sweeping Jet Actuator |
| title_short | Jet Oscillation Frequency Characterization of a Sweeping Jet Actuator |
| title_sort | jet oscillation frequency characterization of a sweeping jet actuator |
| topic | sweeping jet actuator jet oscillation frequency compressibility effect unsteady Reynolds-averaged Navier–Stokes mass flow rate |
| url | https://www.mdpi.com/2311-5521/5/2/72 |
| work_keys_str_mv | AT furkanoz jetoscillationfrequencycharacterizationofasweepingjetactuator AT kursatkara jetoscillationfrequencycharacterizationofasweepingjetactuator |