Consider the ultrasonic low meter shown in Figure below to measure the flow velo
ID: 2266553 • Letter: C
Question
Consider the ultrasonic low meter shown in Figure below to measure the flow velocity, V, of a fluid persaing through it. Ultrasonic Sensor Flow AB Ultrasoni Sensor2 1- Explain why the above flow meter can't be Doppler-based ultrasonic flow meter 2- Does the meters supports reverse flow measurement? 3- Provide the expression of transit-times tAB and tBA, function of L, , the flow velocity v, and speed of sound in the medium, a From the above equations, deduce: 4- a. Which of the liquid flow or gas flow requires the highest resolution timer? Justify your answer. 5- Determine the volume flow rate, Q, function of L, , tAB, and tBA and deduce the advantage of using this 6- Determine the expression of the speed of ultrasonic waves in the medium, a, function of L, taB, and ta and b. If the meter is more accurate to measure high flow rates or low flow rates? equation in case there is a change of the process conditions (e.g. temperature changes) deduce how this expression can be used to determine the mass flow rate of the medium?
Explanation / Answer
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Please find the answer attached as under. Please give a thumbs up rating if you find the answer useful! Have a rocking day ahead!
Since there are mutiple questions posted, I will answer the first one:
1. Doppler based flow meters work on the principle of Doppler shift. To utilise this principle effectively, The flowing liquid needs to have solid materials flowing through it, for example slurries or trapped air bubbles. Since the mentioned liquid in the figure appears to be a relatively clean fluid, the doppler based flowmeter cannot work in this condition.