Answer / abhishek k sharma

vortex is natural phenomena occurring when liquid flow
around a bluff object.
For e.g when we throw the stone in water it generates vortex
in round circle.
same happens when a object is placed in between running liquid.
In vortex flow meter same is used and the frequency of
vortex generated is directly proportional to velocity of
liquid flowin.

Answer / rana mujahid

in vortax flow used a restriction in the flow path which
creat the vortax that are directally proportional to the
velocity of flow.and there used a piezoelectric meterial
these vortax strikes on piezo which creates milivoltes which
are directally prpotional to strike rate of vortax..

Answer / www.islamqa.com

Vortex flowmeter is a velocity based flow measurement device.

It consists of a flow tube with "Bluff body"/object with a specific dimensions/shape put in the flow path to generate vortices in the flow stream.

The vortices generation rate is proportional with fluid flowrate, these vortices is hitting a pressure sensor (piezoelectric type), the hitting rate is proportional to the flowrate.

The basic formula for getting fluid velocity:
V=DF/S
D:Bluff body dimension
F:vortices hitting frequency which is measured by pressure sensor.
S:Strouhal No.
Q=A.V, A:Flow path area

Adv. of no moving parts exist so we have high accuracy & stop in case of sudden flow stopping.

Disadv. of low accuracy with low flowrate.

Ahmed Sabry
Instrumentation & Control Engineer
Mob: +2 122 1367310

What is the difference between a double acting and single acting positioner? what type of valves use single acting positioners?

1 Answers   AquaTech, NamPower, Samson Resources,

---

How can you add value to this Industry if offered the job?

0 Answers   SNS,

---

WHAT IS A CALLIBRATION? WHAT IS MEEAN BY LOOP CHECKING INCLUDES PRESURE, THERMOCOUPLE,TT,DT?

5 Answers  

---

In which principle Woodward Governor 505 work in power plant? What are the input of Woodward governor 505

1 Answers  

---

What are the cable come out from the paddle type flow sensor.and how is further connections

1 Answers  

---

what is the minimum power (P=VI)to produce a spark?

0 Answers  

---

Explain the working principle of variable frequency drive?

0 Answers   ABB,

---

Why rtd  out put is ohm how create the ohm 

1 Answers   Samsung,

---

What is feedback system.

1 Answers   CCIE,

---

How many loops are there in the power plant? how many closed & open loop in the power plant ? Please give me the exact clarification?

2 Answers   Lanco, Reliance,

---

What is the standard height for stancion supports?

4 Answers  

---

how many types of preheaters are in cement industry & what r they can any body explain?

0 Answers  

---