发明名称 |
Aeroacoustic flowmeter |
摘要 |
The flowmeter is based on a measurement of phase difference between two points on the circumference of a pipe separated axially by an integral multiple of sound wavelength. Plane sound waves are generated aeroacoustically by a non-protruding ring cavity energized either directly by the flow or by a subsidiary flow of the same medium. The frequency of the aeroacoustic source varies with temperature and therefore the temperature can be obtained. In the case of steam flow, temperature can be measured independently and therefore from the measured frequency (or speed of sound), the quality of wet steam can be measured. The flowmeter is linear in velocity and no calibrations are required.
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申请公布号 |
US4896540(A) |
申请公布日期 |
1990.01.30 |
申请号 |
US19880179076 |
申请日期 |
1988.04.08 |
申请人 |
SHAKKOTTAI, PARTHASARATHY;KWACK, EUG Y. |
发明人 |
SHAKKOTTAI, PARTHASARATHY;KWACK, EUG Y. |
分类号 |
G01F1/66;G01F1/86;G01F15/04 |
主分类号 |
G01F1/66 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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