U tube Manometer, Piezometer and Single Column Manometer | Pressure Measurement | Shubham Kola - video Dailymotion

Shubham Kola

Subject - Fluid Mechanics  Chapter - Types of Simple Manometers

Transcript

00:07In this video

00:08we will discuss about

00:09different types of simple manometers

00:11and their working principle

00:13in pressure measurement

00:15so the manometer

00:16is a pressure measuring device

00:17used to measure pressure

00:19at a point in fluid

00:20via balancing the column of fluid

00:23by the same fluid or another fluid

00:25and It is commonly known as

00:27U-shaped tube

00:28that is filled with liquid, gas or steam

00:32so manometers

00:33are classified into two categories

00:35that is simple manometer

00:36and differential manometer

00:39the Piezometer

00:40U-tube Manometer

00:41and Single Column Manometer

00:43are the 3 simple manometers

00:46so first is Piezometer

00:47which is simplest type of manometer

00:49which is generally known as

00:51an open tube manometer

00:53One end of this manometer

00:55is connected to point

00:56 where pressure is to be measured

00:58and another end of this manometer

01:00is open to atmosphere

01:02the rise in liquid column

01:04will give the pressure at that point

01:06The pressure at point A

01:08will be evaluated

01:09with the help of given formula

01:12next type is U-tube Manometer

01:16which consists of a glass tube

01:17that is bent in a U-shape

01:19where one end of tube

01:20is connected to a point

01:22where pressure is to be measured

01:24and other end remains open to atmosphere

01:27here tube generally contains mercury

01:29or any other liquid

01:30whose specific gravity is greater than

01:33specific gravity of liquid

01:34whose pressure is to be measured

01:37for measuring gauge pressure

01:39let A be the point

01:40at which pressure is to be measured

01:42whose value is Pa

01:43and the datum line is X X dash

01:47the pressure above the

01:47horizontal datum line X X dash

01:50in the left limb and right limb

01:52of U-tube Manometer

01:53should be same

01:54and which is given by this equation

01:57and the pressure at point A

01:58will be evaluated

01:59with the help of given formula

02:01where h1 and h2 are the heights

02:04of light liquid and heavy liquid

02:06above the datum line respectively

02:09row 1 and row 2 are the densities

02:11of light liquid and heavy liquid

02:13 respectively

02:15for measuring vacuum pressure

02:17the level of heavy liquid in manometer

02:19is as shown in figure

02:21and the pressure at point A

02:23will be evaluated

02:24with the help of given formula

02:27now next type is

02:28single column manometer

02:30single column manometer is of two types

02:33that is Vertical single column manometer

02:35and Inclined single column manometer

02:38In Vertical single column manometer

02:40one limb of manometer

02:42consists of

02:43large container like structure

02:45that is reservoir

02:46and another limb of manometer

02:48is a simple tube

02:50The height raised in tube

02:51will define the pressure

02:53therefore

02:54The formula for determining pressure

02:56at point A

02:57which is to be measured

02:58with the help of given formula

03:00where h1 indicate

03:01Height of low density liquid

03:03above the reference line X X dash

03:06and h2 indicates

03:07Height of high density liquid

03:09above the reference line X X dash

03:11and small g is Acceleration due to gravity

03:14and row 1 and row 2 are the densities

03:17of low density liquid

03:18and high density liquid respectively

03:21the Inclined single column manometer

03:23is just like previous type of manometer

03:25in which

03:26It has one large section

03:28which is termed as reservoir

03:30and another limb of manometer

03:31is a simple tube

03:33that is inclined to certain angle

03:35The rise of fluid in tube

03:36will determine the pressure

03:39therefore

03:39The formula for determining pressure

03:41at point A

03:42which is to be measured

03:43with the help of given formula

03:46where h2 indicate

03:47vertical rise of heavy liquid

03:48in right limb

03:49from X X dash

03:51and h2 equal to L sin theta

03:55where L is length of heavy liquid

03:57moved in right limb

03:58from X X dash

04:00and theta is inclination of right limb

04:02with horizontal

04:04h1 indicate Height of low density liquid

04:06above the reference line X X dash

04:09and row 1 and row 2 are the densities

04:12of low density liquid

04:13and high density liquid respectively

04:16and small g is Acceleration due to gravity

U tube Manometer, Piezometer and Single Column Manometer | Pressure Measurement | Shubham Kola

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