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From: Ashwin on 9 Aug 2010 00:58
Is it possible to measure the flowrate out of an accumulator? I set up a very simple model where I connected the output of a gas-charged accumulator to a hydraulic flow-rate sensor as shown in the image I have linked to:


http://www.4shared.com/photo/eOnNtMLF/accumulator_measureExitFlowrat.html



the exit of the gas-charged accumulator connects to a hydraulic flow-rate sensor. The sensor is connected to a reference and a scope. I have attached a solver block between the gas-charged accumulator and the sensor.

I am very new to simhyrdaulics and would very much appreciate help in trying to resolve this issue!! Thank you!
From: Arnaud Miege on 11 Aug 2010 06:10
"Ashwin " <abhongir(a)gmail.com> wrote in message <i3o1su$qvn$1(a)fred.mathworks.com>...
> Is it possible to measure the flowrate out of an accumulator? I set up a very simple model where I connected the output of a gas-charged accumulator to a hydraulic flow-rate sensor as shown in the image I have linked to:
>
>
> http://www.4shared.com/photo/eOnNtMLF/accumulator_measureExitFlowrat.html
>
>
>
> the exit of the gas-charged accumulator connects to a hydraulic flow-rate sensor. The sensor is connected to a reference and a scope. I have attached a solver block between the gas-charged accumulator and the sensor.
>
> I am very new to simhyrdaulics and would very much appreciate help in trying to resolve this issue!! Thank you!

Yes, you can. However, if you leave all the default parameters for the gas-charged accumulator, you will get an error because the initial pressure computed in the accumulator block is non-zero, whereas the hydraulic reference block imposes zero pressure. Insert a small linear hydraulic resistance between the accumulator and the flow rate sensor to absorb the pressure differential. You'll have to zoom quite a bit around t=0 to see any transients in the flow rate though.

HTH,

Arnaud
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