|
ISSN: 1064-2285 Print
|
|
|
|
| |
You can order a single issue or an individual article, as well as view the table of contents or article abstract by clicking on the volume number, then the issue number in the right sidebar.
|
|
|
|
|
|
Institutional price: $2483.00
|
|
Online subscription
|
|
DOI: 10.1615/HeatTransRes.v39.i2
Pages: 90
|
DOI: 10.1615/HeatTransRes.v39.i2.80
|
Article price - $35.00 |
 |
Separation Region Downstream of an Orifice in a Pulsating Flow
N. I. Mikheev
Research Center of Power Engineering Problems, Kazan Scientific Center of the Russian Academy of Sciences, 2/31 Lobachevskii Str., Kazan, 420111, Russia
I. A. Davletshin
Research Center of Power Engineering Problems, Kazan Scientific Center of the Russian Academy of Sciences, 2/31 Lobachevskii Str., Kazan, 420111, Russia
R. E. Faskhutdinov
Research Center of Power Engineering Problems, Kazan Scientific Center of the Russian Academy of Sciences, 2/31 Lobachevskii Str., Kazan, 420111, Russia
O. A. Dushina
Research Center of Power Engineering Problems, Kazan Scientific Center of the Russian Academy of Sciences, 2/31 Lobachevskii Str., Kazan, 420111, Russia
ABSTRACT
Results of experimental investigations of the structure of flow in a separation region under the conditions of external flow pulsations are presented. As the object of investigations we have selected a configuration that includes a bluff barrier attached to the wall. To ensure a nonresonant flow of the investigated range of frequencies, the experiment was carried out with a short channel in which an orifice was installed directly at the inlet. In the flow above the separation region velocity pulsations with a high and virtually constant, over the range of frequencies, relative amplitude of about 0.3 were created at a low level of pressure fluctuations. Experimental data on the structure of a turbulent separation flow under the conditions of superposed external flow velocity pulsations in a wide range of frequencies f = 0−380 Hz were obtained and generalized in the work. The effect of a double decrease in the dimensions of the separation region in a pulsating flow in comparison with a stationary one has been revealed.
pages 175-182
|
