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Venturi Discharge Coefficient. Limits of use for Venturi tube with machined convergent section are. Work on the physical basis of the equation for the discharge coefficient at high Reynolds number is described and an equation fitting all the gas data from the standard Venturi tubes with an. The study indicates that at low Reynolds numbers the discharge coefficients decrease rapidly with decreasing Reynolds number for Venturi V-cone and wedge flow meters. For the standard Venturi tubes an equation for the discharge coefficient in water has been obtained with an uncertainty of 074 per cent.
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Resulting numerical discharge coefficient data and physical laboratory data ranging from 37400 Re 955700 are shown in Fig. It is that portion of the venturi where the fluid gets converges. Instead as the Re decreases the C value increases to a maximum before sharply dropping off. Venturi Meter is used in various field like. The Coefficient of Discharge when discharges are known formula is defined as the ratio of actual discharge to the theoretical discharge. What happens if a calculation is not within these limits.
The typical range of the discharge coefficient of a Venturi meter is 095-099 but this can be increased by proper machining of the convergent section.
The discharge coefficient tends to increase with Reynolds number largely because of static-hole error the effect that pressure tappings of finite size do not measure the pressure which would have been measured using an infinitely small hole. The installation of direction can be vertical horizontal or it can be inclined also. Actual discharge is given by the actual area and velocity and The theoretical. The discharge coefficient tends to increase with Reynolds number largely because of static-hole error the effect that pressure tappings of finite size do not measure the pressure which would have been measured using an infinitely small hole. The typical range of the discharge coefficient of a Venturi meter is 095-099 but this can be increased by proper machining of the convergent section. Venturimeter gives you a better result than Orificemeter as Venturi meter losses are less so coefficient of discharge is higher whereas in orifice meter due to no convergent and divergent cones there are more losses and hence its coefficient of discharge is less.
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Inside the Venturi-Meter a pressure difference is created by changing the flow passage cross sectional area while the pressure difference helps in determination of the discharge flow rate through the pipe line. Work on the physical basis of the equation for the discharge coefficient at high Reynolds number is described and an equation fitting all the gas data from the standard Venturi tubes with an. Venturi Meter is used in various field like. Resulting numerical discharge coefficient data and physical laboratory data ranging from 37400 Re 955700 are shown in Fig. The orifice plate meter did not follow the general trends of the other meters but rather as the Reynolds number decreased the discharge coefficient increased to a maximum before sharply dropping off with further decrease in the.
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Instead as the Re decreases the C value increases to a maximum before sharply dropping off. A short converging part. β - diameter ratio dD. The value of venturimeter discharge coefficient differs from one flowmeter to the other depending on the. The flow of chemicals in pipelines.
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The study indicates that at low Reynolds numbers the discharge coefficients decrease rapidly with decreasing Reynolds number for Venturi V-cone and wedge flow meters. The throat pass area of the Venturi meter is smaller than the inlet cross sectional area of the Venturi. Cd Venturimeter discharge coefficient β Venturimeter beta ratio dD ε Expansion factor ε 1 for incompressible flow d Venturimeter throat diameter D Upstream pipe dia. The following disadvantages of Venturi. In this chapter the performance of Venturi tubes in high-pressure gas is described.
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The Coefficient of Discharge when discharges are known formula is defined as the ratio of actual discharge to the theoretical discharge. β - diameter ratio dD. The value of venturimeter discharge coefficient differs from one flowmeter to the other depending on the. The discharge coefficient tends to increase with Reynolds number largely because of static-hole error the effect that pressure tappings of finite size do not measure the pressure which would have been measured using an infinitely small hole. In this chapter the performance of Venturi tubes in high-pressure gas is described.
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