1. Horizontal Venturi Meter
Topic :
Horizontal Venturi Meter

2. 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.

3. 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

4. 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.

5. ADVANTAGES OF VENTURI METER
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.

6. 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.

7. 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.

8. APPLICATION IN INDUSTRY
- Flowmeter in pipelines

9. SELF ASSESSMENT– Label the important part of venturi meter?2
Converging Cone 15-20o 3
Throat 1 5 =x
Entry
Exit
Diverging Angle 5-7o 4

10. 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 – (3rd ed); 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 (2nd ed); PWS Publishers; Massachusetts.
Mohd Gomenon bin Su (1989). Teknologi Haba & Bendalir; Delta; Selangor
Munson,Bruce R, Donald F.Young &Theodore H.Okiishi(1998). Fundamentals of Fluid Mechanics-(3rd ed);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.