The development of industrial scale vortex flowmeter

Abstract: the industrial development of vortex flow meter scale information produced by excellent flow meter, flow meter manufacturer to offer you the quotation. In nature, there is a lot of fluid vibration phenomenon. For example the flag waved in the wind; The wild buzzing noise from the overhead wires in the wind; Small streams make the aquatic plants in the water, the movie, small tree swing, etc, are the manifestation of fluid vibration phenomenon. 。 More flow meter manufacturers choose model price quote you are welcome to inquire, here is a industrial scale development of vortex flowmeter article details. In nature, there is a lot of fluid vibration phenomenon. For example the flag waved in the wind; The wild buzzing noise from the overhead wires in the wind; Small streams make the aquatic plants in the water, the movie, small tree swing, etc, are the manifestation of fluid vibration phenomenon. In the fluid vibration ( hydrodynamicoscillation) Phenomenon, & middot; There is corresponding relationship between vibration frequency and velocity of fluid. Using the principle of measuring flow meter mainly include the separation vortex flowmeter ( VortexSheddingFlowmeter) Often called vortex flowmeter; Vortex precession flowmeter ( VortexPrecessingFlowmeter) Often called precession vortex flowmeter; Fluidic flowmeter ( FluidicFlowmeter) 。 Since the mid - 1960 - s, the United States, European countries and Japan scientist successively in a different way of fluid vibration research of flow meter. To the end of the 60 s and early 70 s, has appeared above three kinds of flow meter. Because of the reasons of the manufacture, application and promotion, the development of three kinds of flowmeter is different. Play more fully, the characteristics of vortex flowmeter are accepted by users, early zui rapid development. Two other instrument development is relatively slow, but also gradually promotion in the recent years. In ancient times, people have noticed that the wind can make taut strings of different sounds. Also have in the middle of the night, hanging in the head of a bed wall since the lyre, the night breeze is blowing sound, the master record of the wake from the dream. In the 16th century, in the middle of the famous painter, scientists & middot; Vinci in his works depict the behind the blunt body into the water vortex column. Zui early research vortex phenomenon in the world is the man who is Hungarian physicist strouhal ( 斯特鲁哈尔) 。 In 1878, found in his guidance experiment: under the action of wind, a thin string wire voice tone is proportional to the wind speed, and is inversely proportional to the string wire diameter. In 1879, Harold & middot; Leite ( R five deight) Found: spiral cause fluid vibration, the vibration direction perpendicular to the direction of flow; He also observed: the strings of the inherent tone tone is consistent with the effects of the wind to its, sound will increase sharply. In 1908 Mr Nader ( Ben resistant) Pointed out the cylinder wake behind the periodic is associated with the formation of vortex and arrangement. In 1912, the German physicist von & middot; Chris kaman ( Von．Kallnan） On the basis of a large amount of experimental observation, the stability of the vortex street is studied, and published about infinite uniform flow field in the vortex stability condition of famous papers. From mathematics to justifying the downstream cylinder form vortex stability condition. Kaman this conclusion for the development and application of vortex flowmeter are laid a theoretical foundation. People, however, the main purpose of the early research on vortex phenomenon is in order to take precautions against natural calamities. With industrial development, especially the development of the aviation industry, found the vortex formation damage to the production and construction facilities, such as high-rise buildings, bridge, tower, port facilities, ships mast, cable, drilling platform support, etc. , in the big waves destroyed; Boiler exhaust pipe, tube, pipe of heat exchanger in the temperature of the casing damage or broken are related to the vortex formation. So, in a long time, scholars in the observation and study of vortex formation regularity, explore vortex causes of damage, find out the ways to prevent the damage. The middle of the 20th century, some scholars claim: human struggle with the effects of the vortex harm has lasted for nearly half a century. Things there are always two sides to everything, when some people in the study to prevent the vortex damage, there are others on how to use the principle of vortex phenomenon and do some useful work, application of karman vortex street idea of fluid velocity measurement is one of them. This assumption zui first found in 1935, the United States. In the 1950 s, scientists in the United States roshko ( Roshko） Put forward the possibility of application of karman vortex street measure wind speed, and the related test.

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