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Using Bernouli's Equation.

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16y ago

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What is Working principle of venturi tube?

Venturi tube is used to for flow measurement. It work on the principle of Bernoulli Equation.


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The Venturi tube problem refers to the challenge of accurately measuring fluid flow in a Venturi tube due to pressure losses and inaccuracies. This can be solved effectively by calibrating the tube, ensuring proper installation, and using advanced flow measurement techniques such as ultrasonic or electromagnetic flow meters.


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Determine venturi dimensions and expected differential pressure reading for air flow at 50000 Reynolds number, 500 kPa and 50°C, through a circular tube with 50 mm diameter?

To determine the venturi dimensions and expected differential pressure reading for air flow at 50000 Reynolds number, 500 kPa and 50°C, through a circular tube with 50 mm diameter, we can use the following steps: Calculate the air velocity in the circular tube: The flow rate (Q) can be calculated using the formula Q = π*(d^2)/4 * v, where d is the diameter of the tube and v is the air velocity. Rearranging the formula, we can get v = (4*Q)/(π*d^2). Substituting the given values, we get v = (4*0.0196)/(π*0.05^2) = 12.56 m/s. Calculate the diameter of the throat: The Reynolds number (Re) can be calculated using the formula Re = (ρvd)/μ, where ρ is the density of air, μ is the dynamic viscosity of air, and all other variables are as previously defined. Rearranging the formula, we can get d = (Re*μ)/(ρ*v). Substituting the given values, we get Re = (ρvd)/μ => d = (Re*μ)/(ρv) = (500000.0000185)/(1.184*12.56) = 0.0037 m. Calculate the diameter of the inlet: The area ratio (A1/A2) of the inlet to the throat can be calculated using the formula A1/A2 = (1/ε)^2 * ((2/(γ+1))^((γ+1)/(γ-1)) / ((γ+2)/(γ-1))^((γ+2)/(γ-1))), where ε is the contraction coefficient, γ is the specific heat ratio of air, and all other variables are as previously defined. Substituting the given values, we get A1/A2 = (1/0.6)^2 * ((2/1.4)^1.4 / (4.4/1.4)^2.2) = 2.21. Since the area of the throat is known (πd^2/4), we can calculate the area of the inlet by multiplying it with the area ratio: A1 = A2 * A1/A2 = π(0.0037^2)/4 * 2.21 = 8.40E-06 m^2. The diameter of the inlet can be calculated using the formula d = 2*sqrt(A1/π) = 0.00293 m. Calculate the expected differential pressure reading: The differential pressure (ΔP) can be calculated using the formula ΔP = (ρ*v^2/2) * ((A2/A1)^2 - 1), where all variables are as previously defined. Substituting the given values and the calculated values from steps 2 and 3, we get ΔP = (1.184*12.56^2/2) * ((0.0037/0.00293)^2 - 1) = 525.8 Pa. Therefore, the venturi dimensions for air flow at 50000 Reynolds number, 500 kPa and 50°C, through a circular tube with 50 mm diameter are: the diameter of the throat is 0.0037 m and the diameter of the inlet is 0.00293 m. The expected differential pressure reading is 525.8 Pa.


What is the operating principle of the venturi meter of flow measurement?

Air flowing quickly over the open top of a vertical tube lowers the air pressure in it. This causes liquid in the tube to rise. (It rises due to the higher pressure acting on the other end. The tube is marked to indicate the wind speed. Alternatively, if the open vertical tube is in still air and it is connected at its lower end with a horizontal tube containing a flowing liquid, the liquid in the vertical tube will fall when the horizontal flow past the lower end increases.


Do all shallow well jet pumps use a venturi tube?

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What can the term Venturi refer to?

There are many things the term 'Venturi' may reference. One possible use of the word would be a term used to describe a short piece of tube used to measure flow rate.


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What is the medical term meaning inner diameter of a tube?

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What is difference OD and NB of pipe?

NB = inside diameter of the tube. OD = outside diameter of the tube.