New answers tagged fluid-mechanics
2
In order to supplement @fred_dot_u's answer and add a few details on the nature of the problem that these devices address I'll add a bit of additional material.
For a description of a numerical model of how Stockbridge dampers work and ANSYS simulation results, see for example Aeolian vibration of a single conductor with a Stockbridge damper, Oumar Barry, ...
2
Our water purification system uses an injection pump, in this case a diaphragm style pump. It has a control for volume dispensed during operation. The operation is limited to when water is flowing by a water flow switch. When water is moving through the system, a small hat is lifted and closes a reed switch, activating a relay in the controller, which then ...
1
Then a type of pump that can do precisely controlled delivery is called a peristaltic pump.
It is basically a tube compressed by rollers and as the rollers roll over the tube a precise amount gets delivered.
You will have to check the max working pressure.
5
According to the wiki, these are called Stockbridge dampers. The design is tuned for a specific length and one might also expect a specific mass/material.
The weights are mounted on flexible arms, typically a length of stiff cable, which allow the assembly to absorb energy that might otherwise be imparted to the longer power lines, or more accurately, that ...
0
To summarize your problem description, you have ...
3 HP, 1200 RPM electric motor
40 MPa (400 bar) pump rated 4 LPM @ 40 RPM
Gearbox ratio TBD between motor and pump
Desired operation of 20MPa (200bar) at 4 LPM
First, we can make a few observations from the problem data.
The full-load torque of your electric motor. Note that this number is a nominal ...
1
we need to assume some parameters to start building a model.
let's say your container is a steel sphere with thickness, t = 0.25" to make things a bit easier with a volume of 3000 gallons. So converting to cubic ft, we get
$$V= 3000*0.133=401ft^3 \\ R=\sqrt[3]{3/4*V/\pi} =4.574'$$
And we calculate the stress of this steel container for 200psi.
$$ \sigma ...
0
No. If no vorticity then, no circulation.
Mathematically,
The flux of vorticity is circulation.
$ \Gamma = \int\int \omega~ ds$
So, $\Gamma \rightarrow $ 0 when $\omega \rightarrow $ 0.
Physically, vorticity is just not a rotation of a fluid element. But it is the rotation of that element about its own axis (spin). (Please know about free/forced ...
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As the submersible pump is designed to be located inside water, the water will be natural cooler to the pump. If it is not located inside the water, clearly it will be overheat immediately just after started. Unless you modify the pump by adding cooling oil inside the tube/body, it will be just fine. But keep in mind that adding oil inside the body will add ...
1
This question is asking you to describe how buoyancy works using cylinders because their volumes are easy to calculate.
First, some things we know:
to be buoyant means an object has displaced a mass of fluid equal to it’s own mass.
density is expressed as mass/volume, so if you know a fluid’s mass and density then you can find its volume by dividing mass ...
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