STUDY OF AIR JET IMPINGING ON CURVED SURFACES | ||||
| ERJ. Engineering Research Journal | ||||
| Article 10, Volume 31, Issue 1, January 2008, Page 79-90 PDF (679.52 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/erjm.2008.69507 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| F.Sh. Abou-Taleb; A. Abdel-Fattah; Gamal H. Moustafa | ||||
| Department of Power Mechanical Engineering, Faculty of Engineering Minoufiya University, Shebin El-Kom, Egypt | ||||
| Abstract | ||||
| This study reports experimental and numerical results exposing the effect of the impingement surface geometry on the flow field for impinging low and high speed jets. Air jets from convergent circular nozzle of 10 mm exit diameter have been allowed to impinge normally on a flat plate, hemispherical, and conical surfaces. Experiments were done with varying the stagnation pressure from 1.2 to 2 bar. The Reynolds number based on the nozzle exit diameter for this range of stagnation pressure was changed from 7.5 x 105 to 3 x 106 . The distance between the nozzle exit plane and the test surface was varied from 10 to 80 cm. Measurements of static and total pressure were made by the help of pressure taps made on the test surfaces and a pitot tube. The numerical simulations were performed by the solution of Navier-Stokes equations with a k- ε model. Behaviors of the impinging jets were compared with those of a free jet. The flow field was found to be depend on the stagnation pressure, spacing between the nozzle and impinging surface, as well as the impinging surface geometry. A comparison of the predicted behavior of the jet with those obtained from experimental results gives a good agreement | ||||
| Keywords | ||||
| jet; impingement surface; Navier Stokes; K- ε model; Pitot tube | ||||
|
Statistics Article View: 74 PDF Download: 130 |
||||
