Flow structure and heat transfer during the separation of a pulsating flow

被引：29
|
作者：
Davletshin, I. A. [1 ]
Mikheev, N. I. [1 ]
机构：
[1] Russian Acad Sci, Res Ctr Power Engn Problems, Kazan, Russia
来源：
HIGH TEMPERATURE | 2012年 / 50卷 / 03期
基金：
俄罗斯基础研究基金会;
关键词：
TURBULENT PIPE-FLOW; VARIABLE PROPERTIES; HYDRODYNAMICS; LIQUID; STEP;
D O I：
10.1134/S0018151X12020034
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The results of experimental studies of heat transfer in the separation region and the kinematic structure of the air flow in a channel behind a rib under superimposed discharge pulsations are presented. The effect of heat transfer enhancement of up to1.5 times in comparison with the stationary regime has been established. In the near wake behind the obstacle, it was up to five times. An observable decrease in the reat-tachment length (of up to two times) has been revealed under the pulsating flow regimes. The mechanism of these phenomena has been established, and typical features of the structure of pulsating separated flows have been described on the basis of the results of visualization experiments. The classification of these flows is proposed, and a regime map has been drawn up.
引用
收藏
页码：412 / 419
页数：8
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