{"id":2699,"date":"2018-10-03T09:44:16","date_gmt":"2018-10-03T07:44:16","guid":{"rendered":"http:\/\/www.inst-sim.com\/1\/?p=2699"},"modified":"2018-10-03T10:19:37","modified_gmt":"2018-10-03T08:19:37","slug":"vortex-flowmeter","status":"publish","type":"post","link":"https:\/\/www.inst-sim.com\/1\/flow\/vortex-flowmeter\/","title":{"rendered":"\u0645\u0642\u064a\u0627\u0633 \u0627\u0644\u062f\u0648\u0627\u0645\u0627\u062a \u0644\u0642\u064a\u0627\u0633 \u0627\u0644\u0633\u0631\u064a\u0627\u0646 Vortex Flowmeter"},"content":{"rendered":"

Classified as a vortex flow meter, this device utilises a law that was theoretically proven by Theodore von Karman in 1912. When there is a column-shaped obstruction (vortex shedder) in flowing fluid, it will generate alternating vortices downstream. The flow velocity of the fluid and the vortex generation frequency are proportional to each other. Therefore, detecting the number or pulse of vortices makes it possible to measure flow. The main method of detection involves sensing the vortex vibration with a piezo element. However, a more robust method utilises ultrasonic waves to detect the vortex vibration. [Source<\/a>]<\/p>\n

*
\n\u062c\u0647\u0627\u0632 \u062f\u0648\u0627\u0645\u0627\u062a \u0643\u0631\u0645\u0646 \u0644\u0642\u064a\u0627\u0633 \u0627\u0644\u0633\u0631\u064a\u0627\u0646 Karman Vortex Flow Meter<\/span><\/h2>\n

\u0645\u0628\u0627\u062f\u0626\u00a0Principles\u00a0<\/span><\/h3>\n

\u064a\u0635\u0646\u0641 \u0647\u0630\u0627 \u0627\u0644\u062c\u0647\u0627\u0632 \u0643\u0645\u0642\u064a\u0627\u0633 \u062f\u0648\u0627\u0645\u0627\u062a \u0644\u0642\u064a\u0627\u0633 \u0627\u0644\u0633\u0631\u064a\u0627\u0646 Vortex Flow Meter<\/span> \u060c \u0648\u064a\u0633\u062a\u062e\u062f\u0645 \u0647\u0630\u0627 \u0627\u0644\u062c\u0647\u0627\u0632 \u0642\u0627\u0646\u0648\u0646 \u0623\u062b\u0628\u062a\u0647 \u062a\u064a\u0648\u062f\u0648\u0631 \u0641\u0648\u0646 \u0643\u0627\u0631\u0645\u0627\u0646 Theodore von Karman<\/span> \u0641\u064a \u0639\u0627\u0645 1912 \u0645 . \u062d\u064a\u062b \u0623\u0646\u0647 \u0639\u0646\u062f \u0648\u062c\u0648\u062f \u0639\u0627\u0626\u0642 \u0639\u0644\u0649 \u0634\u0643\u0644 \u0639\u0645\u0648\u062f ( \u0645\u0648\u0644\u062f \u062f\u0648\u0627\u0645\u0627\u062a Vortex Shedder<\/span> ) \u0641\u064a \u0645\u0633\u0627\u0631 \u062a\u062f\u0641\u0642 \u0633\u0627\u0626\u0644 \u060c \u0641\u0625\u0646\u0647 \u0633\u064a\u0648\u0644\u062f \u062f\u0648\u0627\u0645\u0627\u062a \u0645\u062a\u0639\u0627\u0642\u0628\u0629 \u0641\u064a \u0627\u062a\u062c\u0627\u0647 \u062a\u062f\u0641\u0642 \u0648\u0633\u0631\u064a\u0627\u0646 \u0627\u0644\u0633\u0627\u0626\u0644 . \u0648\u062a\u062a\u0646\u0627\u0633\u0628 \u0633\u0631\u0639\u0629 \u062a\u062f\u0641\u0642 \u0627\u0644\u0633\u0627\u0626\u0644 \u062a\u0646\u0627\u0633\u0628\u0627 \u0637\u0631\u062f\u064a\u0627 \u0645\u0639 \u0639\u062f\u062f \u0627\u0644\u062f\u0648\u0627\u0645\u0627\u062a \u0627\u0644\u0646\u0627\u062a\u062c\u0629 . \u0648\u0644\u0630\u0644\u0643 \u060c \u0641\u0625\u0646 \u0627\u0644\u062a\u0645\u0643\u0646 \u0645\u0646 \u0639\u062f \u0627\u0644\u0646\u0628\u0636\u0627\u062a \u0627\u0644\u0646\u0627\u062a\u062c\u0629 \u0645\u0646 \u0627\u0644\u062f\u0648\u0627\u0645\u0627\u062a \u064a\u0645\u0643\u0646\u0627 \u0645\u0646 \u0642\u064a\u0627\u0633 \u0627\u0644\u0633\u0631\u064a\u0627\u0646 Flow<\/span> . \u0648\u0627\u0644\u0637\u0631\u064a\u0642\u0629 \u0627\u0644\u0631\u0626\u064a\u0633\u064a\u0629 \u0644\u0644\u0643\u0634\u0641 \u0639\u0646 \u0639\u062f\u062f \u0627\u0644\u062f\u0648\u0627\u0645\u0627\u062a \u0647\u0648 \u0627\u0633\u062a\u062e\u062f\u0627\u0645 \u062d\u0633\u0627\u0633 \u0643\u0647\u0631\u0648\u0636\u063a\u0637\u064a Piezo Element<\/span> . \u0648\u0645\u0639 \u0630\u0644\u0643 \u060c \u0641\u0627\u0644\u0637\u0631\u064a\u0642\u0629 \u0627\u0644\u0623\u0643\u062b\u0631 \u062f\u0642\u0629 \u0641\u064a \u0627\u0644\u0643\u0634\u0641 \u0639\u0646 \u0639\u062f\u062f \u0627\u0644\u062f\u0648\u0627\u0645\u0627\u062a \u0647\u064a \u0627\u0644\u0637\u0631\u064a\u0642\u0629 \u0627\u0644\u062a\u064a \u062a\u0633\u062a\u062e\u062f\u0645 \u0627\u0644\u0645\u0648\u062c\u0627\u062a \u0641\u0648\u0642 \u0627\u0644\u0635\u0648\u062a\u064a\u0629 Ultrasonic Waves<\/span> .<\/p>\n

.<\/p>\n

\"\"<\/p>\n

\u0634\u0643\u0644 \u0631\u0642\u0645 (1) : \u062a\u0643\u0648\u0646 \u062f\u0648\u0627\u0645\u0627 \u0646\u062a\u064a\u062c\u0629 \u0648\u062c\u0648\u062f \u0639\u0627\u0626\u0642 \u0648\u062a\u063a\u064a\u0631 \u0643\u0644\u0627 \u0645\u0646 \u0627\u0644\u0636\u063a\u0637 \u0648\u0627\u0644\u0633\u0631\u0639\u0629<\/span><\/p>\n

*<\/p>\n

Vortex flow meters are flow sensors that detect the frequency of vortices shed by a bluff body placed in a flow stream. The frequency of the vortices is proportional to the flow velocity. Vortex flow meters are used to measure the flow of liquids and\/or gases and are best suited for turbulent flow with a Reynolds number greater than 10,000.<\/p>\n

The basic principle for a vortex flow meter is that a barrier is placed in a moving stream. As the flow goes around the object it alternates creating vortices (swirls of media) from the top or bottom of the object. The swirls are created from the increase in pressure and decrease in velocity on one side of the object and a decrease in pressure and increase in velocity on the other side. This process creates a swirl on one side of the object and as the process alternates, a swirl is created on the other side. [Source<\/a>]<\/p>\n

*<\/p>\n

\u0637\u0631\u064a\u0642\u0629 \u0639\u0645\u0644 \u0645\u0642\u064a\u0627\u0633 \u0627\u0644\u062f\u0648\u0627\u0645\u0627\u062a \u0644\u0642\u064a\u0627\u0633 \u0627\u0644\u0633\u0631\u064a\u0627\u0646 Vortex Flow Meter<\/span> \u0645\u0628\u0646\u064a\u0629 \u0639\u0644\u0649 \u0627\u0644\u0645\u0628\u0627\u062f\u0626 \u0627\u0644\u0645\u0648\u0636\u062d\u0629 \u0641\u064a \u0634\u0643\u0644 \u0631\u0642\u0645 (2) \u0641\u0639\u0646\u062f\u0645\u0627 \u064a\u062a\u0645 \u0648\u0636\u0639 \u062c\u0633\u0645 \u0627\u0644\u0625\u0639\u0627\u0642\u0629 \u0641\u064a \u0637\u0631\u064a\u0642 \u062a\u064a\u0627\u0631 \u0627\u0644\u062a\u062f\u0641\u0642 \u0646\u062c\u062f \u0623\u0646 \u0627\u0644\u062f\u0648\u0627\u0645\u0627\u062a \u062a\u0638\u0647\u0631 \u0628\u0634\u0643\u0644 \u0645\u062a\u0631\u062f\u062f \u0645\u0646 \u062e\u0644\u0641 \u0647\u0630\u0627 \u0627\u0644\u062c\u0633\u0645 .<\/p>\n

\"\"<\/p>\n

\u0634\u0643\u0644 \u0631\u0642\u0645 (2) : \u0639\u062f\u0627\u062f\u0627\u062a \u0627\u0644\u062f\u0648\u0627\u0645\u0627\u062a<\/span><\/p>\n

<\/p>\n

\u0625\u0646 \u0645\u0639\u062f\u0644 \u062a\u0631\u062f\u062f \u0638\u0647\u0648\u0631 \u0627\u0644\u062f\u0648\u0627\u0645\u0627\u062a \u064a\u062a\u0646\u0627\u0633\u0628 \u0637\u0631\u062f\u064a\u0627\u064b \u0645\u0639 \u0633\u0631\u0639\u0629 \u0627\u0644\u0633\u0627\u0626\u0644. \u0648 \u0628\u0648\u0636\u0639 \u062d\u0633\u0627\u0633 \u0643\u0647\u0631\u0648\u0636\u063a\u0637\u064a Piezoelectric Sensor<\/span> \u062f\u0627\u062e\u0644 \u0645\u0646\u0637\u0642\u0629 \u0638\u0647\u0648\u0631 \u0627\u0644\u062f\u0648\u0627\u0645\u0627\u062a \u064a\u0645\u0643\u0646 \u0625\u0633\u062a\u0634\u0639\u0627\u0631 \u0647\u0630\u0647 \u0627\u0644\u062f\u0648\u0627\u0645\u0627\u062a\u060c \u0648 \u0645\u0646 \u0627\u0644\u0645\u0645\u0643\u0646 \u0625\u0633\u062a\u062e\u062f\u0627\u0645 \u062f\u0648\u0627\u0626\u0631 \u062a\u0643\u0628\u064a\u0631 \u0625\u0636\u0627\u0641\u064a\u0629 \u0644\u0644\u062f\u0644\u0627\u0644\u0629 \u0625\u0645\u0627 \u0639\u0644\u0649 \u0645\u0639\u062f\u0644 \u0627\u0644\u062a\u062f\u0641\u0642 \u0627\u0644\u0644\u062d\u0638\u064a \u0623\u0648 \u0625\u062c\u0645\u0627\u0644\u064a \u0643\u0645\u064a\u0629 \u0627\u0644\u062a\u062f\u0641\u0642 \u0639\u0628\u0631 \u0623\u064a \u0641\u062a\u0631\u0629 \u0632\u0645\u0646\u064a\u0629 \u064a\u062a\u0645 \u0625\u062e\u062a\u064a\u0627\u0631\u0647\u0627. \u0648 \u0647\u0630\u0647 \u0627\u0644\u0639\u062f\u0627\u062f\u0627\u062a \u064a\u062a\u0645 \u0645\u0639\u0627\u064a\u0631\u062a\u0647\u0627 \u0645\u0633\u0628\u0642\u0627\u064b \u0641\u064a \u062c\u0647\u0629 \u0627\u0644\u062a\u0635\u0646\u064a\u0639 \u0644\u0643\u0644 \u0645\u0642\u0627\u0633 \u0645\u0646 \u0645\u0642\u0627\u0633\u0627\u062a \u0627\u0644\u0645\u0648\u0627\u0633\u064a\u0631 \u0627\u0644\u062a\u064a \u064a\u062a\u0645 \u062a\u0631\u0643\u064a\u0628 \u0627\u0644\u0639\u062f\u0627\u062f \u0639\u0644\u064a\u0647\u0627. \u0625\u0644\u0627 \u0623\u0646 \u0647\u0630\u0647 \u0627\u0644\u0639\u062f\u0627\u062f\u0627\u062a \u0644\u064a\u0633\u062a \u0645\u0646\u0627\u0633\u0628\u0629 \u0628\u0634\u0643\u0644 \u0639\u0627\u0645 \u0641\u064a \u0642\u064a\u0627\u0633 \u0627\u0644\u0633\u0648\u0627\u0626\u0644 \u0634\u062f\u064a\u062f\u0629 \u0627\u0644\u0644\u0632\u0648\u062c\u0629. \u0648 \u064a\u0648\u062c\u062f \u0639\u062f\u062f \u0645\u0646 \u0627\u0644\u0645\u062a\u0637\u0644\u0628\u0627\u062a \u0627\u0644\u062e\u0627\u0635\u0629 \u0627\u0644\u062a\u064a \u0644\u0627\u0628\u062f \u0645\u0646 \u062a\u062d\u0642\u064a\u0642\u0647\u0627 \u0639\u0646\u062f \u062a\u0631\u0643\u064a\u0628 \u0647\u0630\u0647 \u0627\u0644\u0646\u0648\u0639\u064a\u0629 \u0645\u0646 \u0627\u0644\u0639\u062f\u0627\u062f\u0627\u062a\u060c \u0648 \u0647\u064a \u0645\u0628\u064a\u0646\u0629 \u0641\u064a \u062f\u0644\u064a\u0644 \u0627\u0644\u062a\u0631\u0643\u064a\u0628\u0627\u062a Installation Guide<\/span> \u0627\u0644\u062a\u064a \u062a\u0635\u062f\u0631\u0647\u0627 \u062c\u0647\u0629 \u0627\u0644\u062a\u0635\u0646\u064a\u0639<\/p>\n

.<\/p>\n

\"\"<\/p>\n

\u0625\u0646 \u0627\u0644\u0645\u0639\u0627\u0645\u0644 \u0627\u0644\u0630\u064a \u062a\u062e\u0636\u0639 \u0644\u0647 \u0639\u0645\u0644\u064a\u0629 \u0627\u0644\u0642\u064a\u0627\u0633 \u0628\u0645\u0642\u064a\u0627\u0633\u00a0\u0627\u0644\u062f\u0648\u0627\u0645\u0627\u062a \u0644\u0642\u064a\u0627\u0633 \u0627\u0644\u0633\u0631\u064a\u0627\u0646 Vortex Flow Meter<\/span> \u0647\u0648 \u0631\u0642\u0645 \u0633\u062a\u0631\u0648\u0647\u0627\u0644 Strouhal Numbe<\/span>r S<\/span>\u00a0\u060c\u00a0<\/span><\/strong>\u062d\u064a\u062b \u0623\u0646 :<\/p>\n

\u0627\u0644\u0642\u064a\u0645\u0629 fs<\/span><\/strong> = \u062a\u0631\u062f\u062f \u0627\u0644\u0638\u0647\u0648\u0631<\/p>\n

\u0627\u0644\u0642\u064a\u0645\u0629 d<\/span><\/strong> = \u0642\u0637\u0631 \u062c\u0633\u0645 \u0627\u0644\u0625\u0639\u0627\u0642\u0629 \u0623\u0648 \u0627\u0644\u0628\u0639\u062f \u0627\u0644\u0645\u0645\u064a\u0632 \u0644\u0647<\/p>\n

\u0627\u0644\u0642\u064a\u0645\u0629 u<\/span><\/strong> = \u0627\u0644\u0633\u0631\u0639\u0629<\/p>\n

.<\/p>\n

\u0625\u0646 \u0631\u0642\u0645 \u0633\u062a\u0631\u0648\u0647\u0627\u0644 Strouhal Numbe<\/span>r S<\/span><\/strong>\u00a0\u0627\u0644\u062e\u0627\u0635 \u0628\u0627\u0644\u062a\u0631\u0643\u064a\u0628\u0629 \u0627\u0644\u0647\u0646\u062f\u0633\u064a\u0629 \u0627\u0644\u0645\u0628\u064a\u0646\u0629 \u0641\u064a \u0634\u0643\u0644 \u0631\u0642\u0645 (2) \u0644\u0647 \u0642\u064a\u0645\u0629 \u062b\u0627\u0628\u062a\u0629 \u0645\u0642\u062f\u0627\u0631\u0647\u0627 0.88 \u0628\u0645\u0642\u062f\u0627\u0631 \u0639\u062f\u0645 \u064a\u0642\u064a\u0646 1% \u060c \u0648 \u0647\u0630\u0627 \u0627\u0644\u0631\u0642\u0645 \u0645\u0642\u0627\u0628\u0644 \u0644\u0623\u0631\u0642\u0627\u0645 \u0631\u064a\u0646\u0648\u0644\u062f Reynolds Number<\/span>\u00a0\u062a\u062a\u0631\u0627\u0648\u062d \u0645\u0646 104<\/sup> \u0625\u0644\u064a 106<\/sup> .<\/p>\n

\u0625\u0646 \u0645\u0628\u0627\u062f\u0626 \u0639\u0645\u0644 \u0638\u0627\u0647\u0631\u0629 \u0627\u0644\u062f\u0648\u0627\u0645\u0627\u062a \u064a\u0645\u0643\u0646 \u0625\u0633\u062a\u062e\u062f\u0627\u0645\u0647\u0627 \u0623\u064a\u0636\u0627\u064b \u0641\u064a \u062a\u0643\u0648\u064a\u0646 \u0627\u0644\u0628\u0646\u064a\u0629 \u0627\u0644\u0625\u0646\u0634\u0627\u0626\u064a\u0629 \u0644\u0645\u0633\u0628\u0627\u0631\u0627\u062a \u0642\u064a\u0627\u0633 \u0627\u0644\u0633\u0631\u0639\u0629. \u0641\u064a\u0645\u0643\u0646 \u062a\u0631\u0643\u064a\u0628 \u062c\u0633\u0645 \u0627\u0644\u0625\u0639\u0627\u0642\u0629 \u0639\u0644\u0649 \u0623\u0646\u0628\u0648\u0628\u0629 \u062d\u0633\u0627\u0633 \u0633\u0631\u0639\u0629 \u0642\u0635\u064a\u0631\u0629\u060c \u0648 \u062a\u0642\u0648\u0645 \u062c\u0647\u0629 \u0627\u0644\u062a\u0635\u0646\u064a\u0639 \u0628\u0645\u0639\u0627\u064a\u0631\u062a\u0647 \u0628\u0634\u0643\u0644 \u0645\u0628\u0627\u0634\u0631. \u0648 \u0628\u0627\u0644\u062a\u0627\u0644\u064a \u064a\u0645\u0643\u0646 \u0648\u0636\u0639 \u0647\u0630\u0647 \u0627\u0644\u062a\u0631\u0643\u064a\u0628\u0629 \u0639\u0646\u062f \u0645\u0648\u0627\u0636\u0639 \u0645\u062e\u062a\u0644\u0641\u0629 \u0641\u064a \u062a\u064a\u0627\u0631 \u0627\u0644\u062a\u062f\u0641\u0642 \u0644\u0642\u064a\u0627\u0633 \u0633\u0631\u0639\u062a\u0647 \u0627\u0644\u0645\u0648\u0636\u0639\u064a\u0629 .<\/p>\n

*<\/p>\n

\u062d\u0633\u0627\u0633\u0627\u062a \u0643\u0634\u0641 \u0627\u0644\u062f\u0648\u0627\u0645\u0627\u062a Vortex Detectors\u00a0<\/span><\/h2>\n