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Action of the Fluid in the Air-Micrometer : 1st Report, Characteristics of Small-Diameter Nozzle and Orifice No.1, In the Case of Compressibility Being Ignored
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Description
Using 5 types of rounded nozzles, 24 types of cylindrical nozzles (l/d=0.799∼16.520, l : length, d : diameter) and 5 types of knife-edged orifices of 0.3mm to 1.2mm diameter, the discharge characteristics were investigated for Reynolds number from 550 to 10000, using distilled water and low-pressure air. The results are summarized : 1. Discharge coefficients, which were calculated on the basis of experiments using distilled water and low-pressure air, fall on the same curves, if arranged by Reynolds number and l/d. 2. Discharge coefficients for each type of nozzle or orifice were collected and one experimental formula was worked out. 3. Downstream pressure of nozzle or orifice is reduced to a minimum at a position of about 1.2 times the pipe diameter and is recovered at about 5 times the pipe diameter. 4. Recovery rate of pressure is about 1.7 m (m : area ratio) for rounded nozzles and 1.2 m for others.
Journal
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- Bulletin of JSME
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Bulletin of JSME 4 (15), 507-515, 1961
The Japan Society of Mechanical Engineers
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Details 詳細情報について
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- CRID
- 1390282681469317632
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- NII Article ID
- 110002362698
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- NII Book ID
- AA0058509X
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- ISSN
- 18811426
- 00213764
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- Text Lang
- en
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- Data Source
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- JaLC
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed