A cylindrical tank for investigating the force generated by a jet striking plates (representing turbine vanes) to aid in the understanding of how turbines work.
Key Features
• Quick and accurate force measurements
• Includes fl at, hemispherical, angled and conical plates
• Clear vessel so that students can see what is happening
• Works with TecQuipment’s Digital Hydraulic Bench (H1F)* for easy installation
Learning Outcomes
Measurement of the impact force and comparison with momentum change of four diff erent plates:
• Flat plate
• Hemispherical plate
• Inclined fl at plate
• 120-degree conical plate
• 30-degree angled plate
Key Specifications
• Flat plate
• Hemispherical plate
• 120-degree conical plate
• 30-degree angled plate
Description
To understand correctly how a turbine (a Pelton wheel for example) works, students need to understand how jet defl ection produces a force on turbine vanes. They also need to know how this force infl uences the rate of momentum flow in the jet.
This product shows students the force produced by a jet of water as it strikes a fl at plate, a hemispherical cup, a 120-degree conical plate or a 30-degree angled plate. They can then compare this to the momentum fl ow rate in the jet. TecQuipment’s Digital Hydraulic Bench (H1F, available separately)* provides the water source for experiments.
The Impact of a Jet consists of a transparent cylinder containing a vertically tapered nozzle and a test plate. The cylinder is on legs and mounts on the top of the hydraulic bench. The nozzle, supplied by the hydraulic bench, produces a high-velocity jet of water which hits the test plate. The test plate connects to a weigh beam assembly with jockey weight which measures the jet force. A drain tube in the base of the cylinder directs water back into the hydraulic bench, allowing accurate fl ow rate measurement.
All test plates are all easily interchangeable, taking only a few seconds and needing no tools.
To perform experiments, students level the apparatus and zero the weigh beam assembly. They set the fl ow from the hydraulic bench to maximum, and measure the jet force. They reduce the fl ow from the hydraulic bench in several increments. At each increment they record the force of the jet on the plate and the fl ow rate. They then repeat the experiments for diff erent test plates. Students compare their experimental results to those calculated from theory, working out charts of rate of force on plate and rate of delivery of momentum.
Essential Base Unit
• Digital Hydraulic Bench (H1F)*
*This product will also work with existing TecQuipment Gravimetric and Volumetric Hydraulic Benches (H1 and H1D)
