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ISSN Druckformat: 1064-2285
ISSN Online: 2162-6561
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Separation Region Downstream of an Orifice in a Pulsating Flow
ABSTRAKT
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.
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Davletshin I. A., Mikheev N. I., Flow structure and heat transfer during the separation of a pulsating flow, High Temperature, 50, 3, 2012. Crossref