The film, made as a teaching aid for students of higher educational institutions, tells about devices that measure the speed of liquid movement and other characteristics of flow turbulence.
Panorama of the hydroelectric power station.
Opening a sluice on the river.
Devices in the laboratory simulating the movement of fashion in hydraulic structures.
Hydraulic research.
Various parameters of water flow are studied in the laboratory.
Device for measuring the speed of water movement.
Destruction in building structures associated with the movement of water flows.
The concept of local instantaneous velocity.
Graph of the distribution of such velocity in the flow.
The concept of average velocity.
Various devices for measuring the speed of a liquid are demonstrated.
Television method of measuring speed.
Laser meter.
The simplest device for measuring the speed of a liquid is the Reebok tube, an improved Pitot tube.
The principle of operation of the device.
Hydrometric current meter.
The principle of operation of the device.
Various designs of current meter.
The design of a current meter produced industrially.
Disadvantages of hydrometric current meter.
The direction of flow when measuring the speed allows you to determine the strain gauge sensor, which uses strain gauges included in the bridge circuit.
Two-component strain gauge.
Sensor design.
Instrument readings during measurements.
Mechantron, an electromechanical device for measuring speed.
Device design.
The concept of average speed.
Average speed formula.
Determining the speed of liquid movement using photography.
Determining the speed of liquid movement using filming.
Disadvantages of photography and filming methods.
Processing film and photo materials obtained during measurements.
Special decoders that help transfer information to a computer medium for subsequent processing on a computer.
Television method for measuring the speed of liquid movement.
A pulse generator is one of the main devices used in measurements using this method.
Disadvantages of the method.
Transferring measurement data to computer media.
Speed of liquid movement, Hydraulic research
Laser velocity meter.
The equipment that the laser meter consists of.
The laser meter allows you to obtain all the necessary kinematic characteristics of the flow automatically.
Cartoon explaining the device of the meter.
Gas laser.
Cartoon explaining the operation of a gas laser.
Liquid velocity formula.
Cartoon explaining the operation of the electronic system of the laser meter.
At the output of the system, a voltage proportional to the velocity of the liquid appears.
Transferring data to punched tape.
The computer calculates various characteristics of the flow turbulence.
A computing center in which calculations are performed according to standard programs.
The laser meter allows you to carry out an express analysis of the velocity directly in the laboratory without the participation of a computer.
For this purpose, the electronic system has a special device that performs spectral analysis of the Doppler frequency, the spectrum of which can be seen on the screen or recorded on paper using a recorder.
The spectrum analyzer allows you to obtain the average velocity and the standard deviation or dispersion.
Advantages of laser velocity measurement.
Laser, Liquid velocity, Turbulence, Express analysis