| Project/Area Number |
07650187
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Fluid engineering
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| Research Institution | Akita University |
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Principal Investigator |
NAKAMURA Masahide Akita University, Mining College, Associate Professor, 鉱山学部, 助教授 (60172441)
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| Project Period (FY) |
1995 – 1996
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| Project Status |
Completed (Fiscal Year 1996)
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| Budget Amount *help |
¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1996: ¥500,000 (Direct Cost: ¥500,000)
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| Keywords | turbuelence / transitional flow / internal flow / pressure distribution / velocity / experimental study / oscillating wall / 二次元流れ / 運動壁 / レイノルズ数 |
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| Research Abstract |
The pressure distributions, velocity distributions and turbulence intesities of the flow through a two-dimensional channel with oscillating wall were measured experimentally. In this study, the experiments were performed in vicinity of the transitional flow region. The experimental results are summarized as follows.
(1) pressure :
a.The steady components of pressure distribution are distorted strongly by the oscillating wall whose frequency lies in vicinity of 30Hz.
b.This effect becomes weak with the increase in Reynolds number.
(2) velocity and turbulent intensity :
a.The oscillation of wall has an effect to flatten the axial component of avedaged velocities and to increase the turbulence intensity.
b.The increase in the wall oscillating frequency and the decrease in the Reynolds number strengthen the distortion of power spectrum due to the wall oscillating effect. Moreover, the distortion of power spectrum is clearly noticed in the low frequency region below 400Hz.
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