Table of Contents
Where the convergent nozzles and convergent divergent nozzles are used?
Convergent nozzles are used for subsonic and sonic flows. They can also be used as flow measuring and flow regulating devices. Convergent-Divergent nozzles are used for Supersonic flows.
What is the converging angle of Venturi?
The converging region is attached to the inlet pipe(flow upstream) and its cross sectional area decreases from beginning to ending. One side it is attached with inlet and its other side are attached with the cylindrical throat. The angle of convergence is generally 20-22 degree and its length is 2.7(D-d).
Why angle of divergence is used in Venturi meter?
Detailed Solution. The venturimeter always have smaller convergent portion and a larger divergent portion. This is done to ensures a rapid converging passage and a gradual diverging passage in the direction of flow to avoid the loss of energy due to separation.
Can Venturimeter be used vertically?
In principle, the homogeneous model can be used with horizontally and vertically oriented Venturis.
When a Venturimeter is used in an inclined position?
kalyan said: Eventhough venturimeter is used in inclined position, it will show the same reading.
Why is divergence more gradual than convergence in a venturimeter?
Originally Answered: why the length of the diverging section in the venturimeter is longer than the converging? Because it reduce the backward motion of flow. It is not related to length. It is related with the angle.
Is it possible to use venturimeter for measuring discharge in an open channel?
Flow rate measurement in open channel : VENTURI CHANNEL. Flow rate measurements in open channel, particularly with contaminated liquids, even corrosive or with solid particles. In association with a level transmitter, it is the right solution for continuous flow measurement, reliable and accurate.
What is the maximum angle of divergence in the Venturi meter?
7°
Angle of diverging portion of the venturimeter is limited to 7°, because: 1) Flow decelerates in the diverging portion and pressure increases in the downstream direction.
What is the range for angle of divergence in Venturi meter?
10° to 15°
In order, to avoid separation in Venturi meter the angle of divergence is kept. 10° to 15°
What is a convergent divergent nozzle?
This nozzle configuration is called a convergent-divergent, or CD, nozzle. In a CD nozzle, the hot exhaust leaves the combustion chamber and converges down to the minimum area, or throat, of the nozzle. The throat size is chosen to choke the flow and set the mass flow rate through the system.
What is the difference between a venturi meter and a CD nozzle?
Venturi meter is a flow measuring device used to measure the flow rate of fluids. In Venturi meter the machine number is less, mostly less than 1. Where as in CD nozzles are used in turbines and rockets. In order to drive these More velocity is required. So, the mach number varies from Sonic to super sonic.
What is a CD nozzle?
A nozzle is a relatively simple device, just a specially shaped tube through which hot gases flow. Ramjets and rockets typically use a fixed convergent section followed by a fixed divergent section for the design of the nozzle. This nozzle configuration is called a convergent-divergent, or CD, nozzle.
What type of nozzle is used in a rocket?
Ramjets and rockets typically use a fixed convergent section followed by a fixed divergent section for the design of the nozzle. This nozzle configuration is called a convergent-divergent, or CD, nozzle. In a CD nozzle, the hot exhaust leaves the combustion chamber and converges down to the minimum area, or throat, of the nozzle.