Experimental Investigations of Two Side-by-Side Jets in a Cross Flow
| Autor: | Carlos Orrala, Hamid Rahai |
|---|---|
| Rok vydání: | 2004 |
| Předmět: |
Physics
business.industry Astrophysics::High Energy Astrophysical Phenomena Nozzle Reynolds number Near and far field Mechanics Turbulent shear stress Physics::Fluid Dynamics symbols.namesake Boundary layer Optics Turbulent velocity Turbulence kinetic energy symbols High Energy Physics::Experiment business Wind tunnel |
| Zdroj: | 42nd AIAA Aerospace Sciences Meeting and Exhibit. |
| DOI: | 10.2514/6.2004-1109 |
| Popis: | Single poi nt measurements of three components of turbulent velocity and their cross moments were made downstream of a single and two side -by -side jets in a cross flow. For both cases, the ratio of jet to cross flow momentum was 3.3. The Reynolds number based on jet diameter was nearly 6200. The distance between the two side -by -side jets was two -jet diameter. The jets’ nozzles were flush with the wind tunnel surface of the working area within the turbulent boundary layer. Measurements were carried out at six different planes of x/d = 0.5, 1, 2, 5, 10.7, and 15.7. Here x is the streamwise direction along the cross flow and d is the inside diameter of the jet nozzle. Results showed that for the double jets there were increased regions of high turbulence intensity, secon dary flow and turbulent shear stress, near the flat plate surface in the near field region, resulting in enhanced mixing in these areas. The trajectories of the double jets showed reduced penetrations in the near field when compared with the corresponding results for the single jet. However, in the far field, the penetration rates of the single and the double jets were nearly identical. NOMENCLATURE |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|