What is draft tube explain?
Draft Tube is a diverging tube fitted at the exit of runner of turbine and used to utilize the kinetic energy available with water at the exit of runner. This draft tube at the end of the turbine increases the pressure of the exiting fluid at the expense of its velocity.
What is draft tube and its function?
Draft tube: The draft tube is a conduit which connects the runner exit to the tail race where the water is being finally discharged from the turbine. The primary function of the draft tube is to reduce the velocity of the discharged water to minimize the loss of kinetic energy at the outlet.
How do you explain a tube?
English Language Learners Definition of tube
- : a long, hollow object that is used especially to control the flow of a liquid or gas.
- : an object shaped like a pipe.
- : a soft, long, narrow container that has a small opening at one end and that contains a soft material which can be pushed out by squeezing.
What is drafting simple?
The act or process of producing a technical drawing, or draft. A profession, usually related to making technical drawings for architecture, engineering, or manufacturing.
What is draft tube explain the different types of draft tube?
There are mainly 4 types of draft tube, and those are: Conical draft tube. Simple elbow draft tube. Moody spreading draft tube.
What is draft tube explain types of draft tubes with sketches?
A draft tube is a kind of tube which connects (or acts as an intermediately) between the water turbine exit and tail race. Note: Tail race is the water channel that carries away water from the turbine exit. A draft tube has an increasing cross-sectional area from the inlet to the out let (as shown in figure).
How many types of draft are there?
Drafts are produced by the rising combustion gases in the stack, flue, or by mechanical means. For example, a blower can be put into four categories: natural, induced, balanced, and forced. Natural draft: When air or flue gases flow due to the difference in density of the hot flue gases and cooler ambient gases.
Why is a tube called a tube?
When television became the trendy new vehicle for news and entertainment in the mid-20th century, some people started calling it the tube. That nickname soon spawned an even catchier one: the boob tube. The former phrase likely stemmed from the process by which televisions exhibited images.
What is the use of tube?
tube in American English a hollow cylinder or pipe of metal, glass, rubber, etc., usually long in proportion to its diameter, used for conveying fluids, etc.
What does drafting mean in school?
Drafting is a form of graphic communication concerned with the preparation of drawings needed to develop and manufacture a product. In Drafting 1, you will learning the basics of technical drawing using both pencil and paper and CAD (computer aided drafting).
What is a draft example?
The definition of draft is something that is used for pulling, drawn from a cask or is in a rough form. An example of draft is a horse that pulls a beer truck. An example of draft is a beer on tap. An example of draft is a book without any corrections made.
What are the advantages of a draft tube?
Advantages of Draft Tube Using the draft tube prevents the splashing of water from the runner and leads the water to the tailrace. The net turbine head is raised as the height is increased between the turbine exit and the tailrace because of the use of the draft tube.
What is the purpose of a draft tube?
Draft Tube is a diverging tube fitted at the exit of runner of turbine and used to utilize the kinetic energy available with water at the exit of runner. ‘.
Which is the tail race of a draft tube?
A draft tube is a kind of tube which connects (or acts as an intermediately) between the water turbine exit and tail race. Note: Tail race is the water channel that carries away water from the turbine exit. A draft tube has an increasing cross-sectional area from the inlet to the out let (as shown in figure).
Where is the draft tube in a power turbine?
Draft tube installed above tail race. In power turbines like reaction turbines, Kaplan turbines, or Francis turbines, a diffuser tube is installed at the exit of the turbine, known as draft tube. This draft tube at the end of the turbine increases the pressure of the exiting fluid at the expense of its velocity.
What are the disadvantages of a draft tube?
The disadvantages of Draft Tube are as follows. Without the usage of a draft tube, there is a pressure drop developed due to the lack of water and thereby the entire turbine can fail because the turbines need a minimum amount of water to propel and to produce energy.