Measurement of unsteady flow and turbulence in a low speed axial compressor

被引：7
|
作者：
Sentker, A [1 ]
Riess, W [1 ]
机构：
[1] Univ Hannover, Inst Turbomachinery, D-30167 Hannover, Germany
来源：
EXPERIMENTAL THERMAL AND FLUID SCIENCE | 1998年 / 17卷 / 1-2期
关键词：
axial compressor; turbulence measurement; hot-film technique; unsteady flow field;
D O I：
10.1016/S0894-1777(97)10057-7
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
A two-stage experimental axial compressor with incompressible flow conditions and relatively large geometric dimensions is utilized for a detailed investigation of the unsteady flow field and the structure of turbulence. Hot-film probes in split-film configuration operated in constant temperature (CT) mode in different forms and orientations are applied. Evaluation of the measurements in a mainflow/crossflow/radial flow reference system renders turbulence data and Reynolds-stress terms compatible with the physics of the wake flow. Turbulence between the rotor blade wakes is relatively low with 3% and nearly isotropic. Turbulence in the wakes increases about threefold to 10%, has a characteristic structure and is definitely anisotropic. It depends distinctly on the operating point of the compressor. A comparison of the different probe types shows good results between the rotor blade wakes. In the wake region the circumferential extension of one probe type enables a correct measurement of the unsteady flow components. (C) 1998 Elsevier Science Inc. All rights reserved.
引用
收藏
页码：124 / 131
页数：8
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