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Influence of surface roughness on Reynolds number effects(PDF)

长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2009年02期
Page:
56-59
Research Field:
Publishing date:
2009-02-20

Info

Title:
Influence of surface roughness on Reynolds number effects
Author(s):
LI Jia-wu; CUI Xin; ZHANG Hong-jie; LIU Jian-xin
School of Highway,Chang’an University,Xi’an 710064,Shaanxi,China
Keywords:
bridge engineering;  Reynolds number effect;  wind tunnel test;  static coefficient;  surface pressure
PACS:
U441
DOI:
-
Abstract:
In order to study the influence of surface roughness on Reynolds number effects of bridge deck section and investigate the approach of increasing surface roughness to reduce the Reynolds number effect, several models with different surface roughness were tested in wind tunnel. The surface roughness of model was altered by gluing different kinds of sand paper on the model surface. Based on the smooth and rough surface model of streamline bridge deck, the investigation into Reynolds number effects of static aerodynamic force coefficients and pressure coefficients were carried out in CA1 wind tunnel. The research results indicate that the Reynolds number effects of streamline bridge deck are considerable even in narrow range of the Reynolds number. The surface roughness could be served as a method mitigating Reynolds number effects. Therefore, the test results show that the Reynolds number effects of stream line bridge deck can be minimized by increasing surface roughness. 10 figs, 10 refs.

References:

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[2]Schewe G.Reynoldsnumber effects in flow around moreorless bluff bodies［J］.Journal of Wind Engineering and Industrial Aerodynamic,2001,89（14/15）：12671289.
[3]Barre C,Barnaud G.High Reynolds number simulation techniques and their application to shaped structures model test［J］.Journal of Wind Engineering and Industrial Aerodynamics,1995,57(2/3):145157.

Memo

Memo:
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Last Update: 2009-02-20