An orifice plate is a device used for measuring flow rate, for reducing pressure or for restricting flow (in the latter two cases it is often called a restriction plate).
My employer has asked me to derive a method or equation for determining noise (in decibels) in orifice flow meters. I was wondering if anyone has any suggestions that could help me get on my way? I've been looking at basic principles of aerodynamic and hydrodynamic noise predicitions. As far as...
The Pipeline Rules of Thumb Handbook uses the equation Q = D^2*P to estimate the flow rate of escaping gas from a pressured line (see link below for excerpt) under standard conditions. Where Q is flow rate in Mcf/hr, D is diameter of the nipple or orifice in inches, and P is the absolute...
We have a situation where we have air in front of the dry pigs and need to control the pig speed
Medium is air, pressure is 17 barg upstream and 0.2 barg downstream and pig speed target is O.5 m/s for the pig in the 48" pipeline with a pressure of 17 barg.
need to find the following...
This is not a homework question. I am trying to figure it out myself.
Let a spherical shell of radius R be filled with a liquid (full). Now let a small hole of area A be made at the bottom of the shell. Find the time required to empty the shell completely.
Hi,
I am currently trying to do a project for my final year in engineering.I have not been able to find any software that's helping me in simulating and obtaining results for pressure drop through an orifice plate.
i have tried the fluid option in ansys v10 dinn't understand how to use it...
Homework Statement
A fluid of relative density 0.86 and viscosity 0.003 pa flows through a pipe of 12cm diameter. The flow rate is measured using an orifice plate with a 6cm diameter orifice, with pressure tapping connected to a differential U-tube manometer using mercury (density = 13600 kg...
How will the angle of the sharp edged orifice affect the flow pattern. Most of the angle is encourage to keep at 30 or 45 degree.
For a study vortex generation by pushing the water through a sharp edged orifice, what is the optimum angle I should adopt or what consideration should be made...
I am tasked to design an orifice plate to be inserted into a water tunnel in an experiment and do a research on the dynamics of the fluid movement.
The problem is that the currently water tunnel facility is already available in my lab. The water tank is very similar to a normal aquarium tank...
Hello People,
I was just wondering if any of you done any similar investigation on the following topic. Basically, i currently doing a research on orifice plate in a pipe. It would be great if you guys know any journals that i can refer to.
Hi. I am looking for a relation or coefficient which describes the pressure loss of a flow through an orifice. Now I know what this is for a normal flat plate orifice for water. What I need is the appropriate coefficients for an orifice plate at an angle both for water(incompressible) and...
Hello,
I guess this is something of a fluid dynamics problem.
I'm having some trouble understanding non-backpressure compensated variable orifice flowmeters (NBPCVOF) used with medical gas tanks. Regarding a non-backpressure compensated flowmeter, I'm being told that adding partial...
When designing an orifice plate to reduce the pressure of a constant flowing liquid, is it best to have one large hole in the center or multiple smaller holes?
One example: Pipe diameter = 10 inches, Flow = 2800 gpm water, pressure drop = 150 psi, temperature = 115 F. The hole diameter...
hello all,
i need to calculate the size of an orifice that will pass a certain volume of a viscous fluid
per time of say 10 seconds
pressure and viscosity are the variable values.
the application is in the design of a valve for dispensing accurate amounts of
a liquid of a given...
I think my forum name gives it away, I am a home snow maker looking to make a new snow gun and I need a little help from you guys.
Here is my dilemma/situation. I have water flowing at 350 psi, into a pipe that has 100 psi, a differential pressure of 250 psi. I only want .06 gallons per...
Hi everybody!
I hope somebody can help me...
We are using a plate orifice to measure water feed to a reboiler; the pipeline size is 1" and the orifice was initially designed for 0-1800 kg/h of water, with a maximum pressure drop of 1000 mm water. As water feed doubles may I simply change...
The equation I have for velocity through a circular orifice plater is as follows:
Ud = \frac{Yi\timesC}{\sqrt{(1-(d/D)^4)}}\sqrt{\frac{(2\times(P_{2}-P_{1})}{\rho}}
To my understanding, flow becomes choked when this velocity exceeds a Mach number of 1, and is no longer sub-sonic...
Homework Statement
How much water will flow through a hole with diameter 1cm?we have a tubular container, water column 10 meters high- at the bottom is a hole with a diametr of 1 cm. the tube is constatly being refilled so the height of the water column remains the same - 10 meters.how much...
Hello all,
I'm trying to induce hydrodynamic cavitation in a water filled vessel at STP using a high pressure piston pump and an orifice plate.
Does anyone have any knowledge of estimation methods for the relationship between pressure drop, orifice area and cavitation intensity? Clearly the...
Hello everybody
Its Bashir .. I am doing a research on Upflow floating media filte and have some questions and kindly ask u to help me
:I will explain to u what I am going to do exactly
1) I have to built a filter pilot plant for water treatment ( its my research )
This filter will...
Hello,
I am trying to figure out how to calculate the diameter of an orifice for a pill loop in an oil heater and pump. The hot oil is used to heat fuel in a heat exchanger, and is driven by a positive displacement pump. There is a spill loop with an orifice plate, and the requirement is...
Hi there,
I have used an orifice for my project to measure the pressure difference and hence the mass flow rate of air going through a pipe of 26 mm diameter. i kept changing the flow from max to min and ended up with values of pressure diference. The questions here is how to convert thses...