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Document Type |
: |
Article In Journal |
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Document Title |
: |
Comparative Studies of Hot-Wire Techniques for Moderate Intensity Flows دراسة مقارنة لتقنية السلك الحراري الساخن في تدفق ذي شدة اضطراب متوسطة |
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Subject |
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Original Works |
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Document Language |
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English |
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Abstract |
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Methods employing hot wire anemometer techniques in obtaining
quantitative turbulence information in turbulent flows are numerous.
These techniques, however, were tested in different flow geometries
under different operating conditions. It is difficult to decide on a technique
preference unless the different techniques are tested under similar operating
conditions and flow geometry. It is the main objective of this study to
compare the single-wire, .r-wire, and triple-wire measurement techniques
under the same operating conditions.
Measurements of mean velocity and Reynolds stress components were
conducted at seven different axial locations downstream of the jet exit plane
using the single-wire, .r-wire , and triple-wire techniques. A computer controlled
three-dimensional traverse mechanism in conjunction with a data
acquisition software developed for turbulent flow measurements and
analysis were utilized.
The results showed that the three hot wire techniques gave similar results
for the mean velocity components U, V, Wand the Reynolds stress components
uv, UW, vw and u', This agreement, however, was not apparent
when comparing the normal stresses v2 and w2 , especially for the singlewire
technique. A very close agreement was achieved when the normalized
mean axial velocity, U/Uc and the normalized turbulence intensity u' IU,
were compared with the data published in the literature. This resulted in a
good confidence of the accuracy of the measurement techniques used. |
|
ISSN |
: |
1319-1047 |
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Journal Name |
: |
Engineering Sciences Journal |
|
Volume |
: |
9 |
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Issue Number |
: |
1 |
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Publishing Year |
: |
1417 AH
1997 AD |
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Number Of Pages |
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16 |
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Article Type |
: |
Article |
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Added Date |
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Sunday, October 11, 2009 |
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Researchers
| محمد حسين البيروتي | M. H. AL-BEIRUTTY | Researcher | | |
| عبد الحي محمد رضوان | A. M. RADHWAN | Researcher | | |
| عادل محمد خليفة | A. M. KHALIFA | Researcher | | |
|