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Topic :. Horizontal Venturi Meter. OBJECTIVES. At the end of the session, student should be able to : Sketch, label and describe fluid motion mechanism in the horizontal venturi meter. List 5 advantages of horizontal venturi meter. The application of venturi meter in industries.

Topic :

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### Topic :

Horizontal Venturi Meter

### OBJECTIVES

At the end of the session, student should be able to :

• Sketch, label and describe fluid motion mechanism in the horizontal venturi meter.

• List 5 advantages of horizontal venturi meter.

• The application of venturi meter in industries.

## VENTURI HORIZONTAL METER - a device used for measuring the rate of flow

Converging Cone 21o

Throat

=x

Entry

Exit

1

2

A1

V1

P1

A2

V2

P2

Diverging Angle 5-7o

### MECHANISM OF VENTURI METER

• The Fluid is accelerated through a converging cone of angle 21o.

• Pressure are taken at the entrance and the throat.

• The angle of diverging cone is 5 – 7o to ensure the minimum loss of energy.

• For continuity of flow V1< V2 but P1> P2.

• The pressure recovery is much better than for the orifice plate.

• Suitable for clean, dirty and viscous liquid.

• Pressure loss is low.

• Viscosity effect is high.

• Relative cost is medium.

### VENTURI METER IN INDUSTRY

• Intake System in Engine

• Intake System is the Modular Venturi Tube which is found inside the intake.

• The removable MVT assures correct air/fuel ratios at all rpm ranges.

• It is also removable for additional air flow capabilities with customer-provided custom electronic tunin.

### Cont…VENTURI METER IN INDUSTRY

• Venturi Injector (Air & water treatment)A venturi can be used to mix a fluid with air. At the end of the system, a mixture of fluid and air will appear.The simplest apparatus, as shown in the diagram, is a tubular setup known as a Venturi tube or simply a venturi.

Fluid flows through a length of pipe of varying diameter.

### APPLICATION IN INDUSTRY

- Flowmeter in pipelines

## SELF ASSESSMENT– Label the important part of venturi meter?

2

Converging Cone 15-20o

3

Throat

5

1

=x

Entry

Exit

Diverging Angle 5-7o

4

### Refferences

• www.pkb.edu.my

• Douglas,J.F (1993). Solving Problems in Fluid Mechanics – Volume 1; Longman; Singapore.

• Douglas,J.F, J.M Gasiorek & J.A Swaffield (1996). Fluids Mechanics – (3rded); Longman; Singapore.

• Eastop,T.D & A. McConkey (1983). Applied Thermodynamics For Engineering Technologists (3rd ed); Longman; New York.

• Janna, William S.(1987). Introduction To Fluid Mechanics (2nded); PWS Publishers; Massachusetts.

• MohdGomenon bin Su (1989). TeknologiHaba & Bendalir; Delta; Selangor

• Munson,Bruce R, Donald F.Young &Theodore H.Okiishi(1998). Fundamentals of Fluid Mechanics-(3rded);John Wiley & Sons,Inc; Canada

• Prasuhn, Alan L (1980). Fundamentals of Fluid Mechanics; Prentice-Hall; London

• R.S Khurmi (1975). A Text Book of Hydraulics, Fluid Mechanics and Hydraulic Machines; S. Chand & Co; New Delhi.