FREE Bachelor of Mechanical Engineering Hydraulic Machines Questions and Answers
Discharge through a reaction turbine with radial flow is .
The circumference of the runner, the thickness, the whirl velocity, and the inlet and outlet runner vanes all contribute to the discharge of a radial flow reaction turbine. P1 is the runner's intake perimeter, P2 is the outlet perimeter, thickness is b, and flow velocity is Vf.
The degree of reaction in the case of gas turbines and compressors is .
The ratio of the isentropic enthalpic drop that is created in the rotor, such as the moving blades, to that of the isentropic heat drop in the stationary blades, is known as the degree of response in terms of gas turbines and compressors.
The hydraulic energy that is converted into electricity is .
Hydraulic machinery is used to produce hydroelectric power. Water's potential energy is changed into mechanical energy and coupled to a dynamo to produce electrical energy.
A reaction turbine with inward radial flow is called .
Francis is an outward radial flow reaction turbine, whereas Kaplan and propeller are outward axial flow reaction turbines.
Spiral casing is seen in radial flow reaction turbines and it has the following area:
The spiral structure's surface area eventually diminishes because as discharge declines, so does surface area. As a result, the runner will revolve at a consistent speed.
Axial flow reaction turbines of particular significance are .
Propeller and Kaplan turbines are examples of axial flow turbines, which are those in which water flows axially outward.
Vapour cavity creation is known as .
Cavitation is the process by which vapour cavities form. It forms as a result of the existence of tiny, free liquids in various zones. These zones are being influenced by several layers of influences.
Around the turbine runner, the ___________ is made up of stationary circular wheels.
To control the flow and offer shock-free entrance at the runner's intake, guide vanes are installed around the runner.
A pipe with progressively larger surface area is utilized to transport water from the turbine's outlet to the tail race.
As the water exiting the runner has less pressure, the draft tube will increase the pressure energy of the water by reducing its velocity.
Turbines with water flowing through them are known as radial flow reaction turbines.
The name alone denotes the existence of a radial flow, however it is unclear whether this flow is radially inward or outward.
Radial flow reaction turbines' primary components are .
A radial turbine's basic components include a tight casing to prevent water spillage, a runner, guide vanes, a guide mechanism to control flow, and draft to raise inlet pressure.
_____________ is an axial flow reaction turbine if the vanes are fastened to the turbine hub.
If the vanes are fastened to the hub of the turbine, it is referred to as a Propeller turbine; if the vanes are free to move, it is referred to as a Kaplan Turbine. An axial flow turbine is one in which water flows axially outwards.
The pressure at the reaction turbine's runner exit is often ______Â than the atmospheric pressure
Generally speaking, the pressure at the runner's departure is modest relative to the ambient pressure.
The category of a hydraulic coupling is .
An apparatus called a hydraulic coupling is used to transmit rotation between shafts by accelerating and decelerating hydraulic fluid.
A turbine with an inward radial flow response is one in which water flows across the runner blades.
The name alone suggests that the flow is radial and moves from the outside in to the center.
What is currently the least expensive method of generating power?
A renewable energy source, hydraulic energy uses the potential energy of water to create mechanical energy that is then coupled to a dynamo to produce electrical energy.