Fluid machinery ppt

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Fluid machinery ppt

Toggle navigation. Help Preferences Sign up Log in. View by Category Toggle navigation. Products Sold on our sister site CrystalGraphics. Tags: fluid mechanics bernoulli energy equation fluid mechanics. Latest Highest Rated. A fluid could be a gas or a liquid. An ideal fluid is assumed to be incompressible so that its density does not changeto flow at a steady rate, to be non-viscous no friction between the fluid and the container through which it is flowingand to flow without rotation no swirls or eddies.

This pressure increases with depth below the surface of the fluid. If we go down to a depth from the surface, the pressure becomes greater by the product of the density of the water? Thus the pressure P2 at this depth is P2 P1? The pressure measured is called the gauge pressure and the unknown pressure is referred to as the absolute pressure.

Pabs Pgauge Patm? This principle is basic to all hydraulic systems. An object lowered into a fluid appears to lose weight. The force that causes this apparent loss of weight is referred to as the buoyant force.

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The buoyant force is considered to be acting upward through the center of gravity of the displaced fluid. FB mF g? Streamline flow assumes that as each particle in the fluid passes a certain point it follows the same path as the particles that preceded it. There is no loss of energy due to internal friction viscosity in the fluid. In reality, particles in a fluid exhibit turbulent flow, which is the irregular movement of particles in a fluid and results in loss of energy due to internal friction in the fluid.

Turbulent flow tends to increase as the velocity of a fluid increases. This is expressed as the equation of continuity. A v constant In streamline flow, the fluid is considered to be incompressible and the density is the same throughout?

A1 v1? Consider a tube in which one end is at a height y1 and the other end is at a height y2 19 This equation states that - the sum of the pressures at the surface of the tube, - PLUS the dynamic pressure caused by the flow of the fluid, - PLUS the static pressure of the fluid due to its height above a reference level remains constant.

The pipe shown in the figure has a diameter of 16 cm at section 1 and 10 cm at section 2. At section 1 the pressure is kPa. Point 2 is 6. A diver descends from a salvage ship to the ocean floor at a depth of 35 m below the surface. The density of ocean water is 1.A shuttle valve allows two alternate flow sources to be connected in a one-branch circuit. The valve has two inlets P1 and P2 and one outlet A.

Outlet A receives flow from an inlet that is at a higher pressure. If the pressure at P1 is greater than that at P2, the ball slides to the right and allows P1 to send flow to outlet A. If the pressure at P2 is greater than that at P1, the ball slides to the left and P2 supplies flow to outlet A One application for a shuttle valve is to have a primary pump inlet P1 and a secondary pump inlet P2 connected to the system outlet A The secondary pump acts as a backup, supplying flow to the system if the primary pump loses pressure.

A shuttle valve is called an OR valve because receiving a pressure input signal from either P1 or P2 causes a pressure output signal to be sent to A. Pressure relief Valve It is normally a closed valve whose function is to limit the pressure to a specified maximum value by diverting pump flow back to the tank. A poppet is held seated inside the valve by a heavy spring. When the system pressure reaches a high enough value, the poppet is forced off its seat. This permits flow through the outlet to the tank as long as this high pressure level is maintained.

Note:the external adjusting screw, which varies spring force and, thus, the pressure at which the valve begins to open cracking pressure. If the hydraulic system does not accept any flow, then all the pump flow must return to the tank via the relief valve.

The pressure-relief valve provides protection against any overloads experienced by the actuators in the hydraulic system. Of course, a relief valve is not needed if a pressure-compensated vane pump is used.

fluid machinery ppt

The dashed pilot line from the inlet line to the bottom of the box indicates inlet pressure can push against the flow arrow. A pilot-operated pressure-relief valve consists of a small pilot relief valve and main relief valve as It operates in a two-stage process: 1. The pilot relief valve opens when a preset maximum pressure is reached. When the pilot relief valve opens, it makes the main relief valve open.

The pilot-operated pressure-relief valve has a pressure port that is connected to the pump line and the tank port is connected to the tank. The pilot relief valve is a poppet type.

The main relief valve consists of a piston and a stem. The main relief piston has an orifice drilled through it. The piston has equal areas exposed to pressure on top and bottom and is in a balanced condition due to equal force acting on both the sides. It remains stationary in the closed position. The piston has a light bias spring to ensure that it stays closed. When the pressure is less than that of relief valve setting, the pump flow goes to the system. If the pressure in the system becomes high enough, it moves the pilot poppet off its seat.

A small amount of flow begins to go through the pilot line back to the tank. Once flow begins through the piston orifice and pilot line, a pressure drop is induced across the piston due to the restriction of the piston orifice.

This pressure drop then causes the piston and stem to lift off their seats and the flow goes directly from the pressure port to the tank. The advantages of pilot-operated pressure-relief valves over direct-acting pressure-relief valves are as follows: 1.

Pilot-operated pressure-relief valves are usually smaller than direct-acting pressure-relief valves for the same flow and pressure settings.

Fluid Mechanics by RK Bansal PDF Free Download (Hydraulic Machines)

They have a wider range for the maximum pressure settings than. Pressure reducing value This type of valve which is normally open is used to maintain reduced pressures in specified locations of hydraulic systems. It is actuated by downstream pressure and tends to close as this pressure reaches the valve setting A pressure-reducing valve uses a spring-loaded spool to control the downstream pressure.

If the downstream pressure is below the valve setting, the fluid flows freely from the inlet to the outlet.

fluid machinery ppt

Note that there is an internal passageway from the outlet which transmits outlet pressure to the spool end opposite the spring. When the outlet downstream pressure increases to the valve setting, the spool moves to the right to partially block the outlet port.After you enable Flash, refresh this page and the presentation should play.

Get the plugin now. Toggle navigation. Help Preferences Sign up Log in. To view this presentation, you'll need to allow Flash. Click to allow Flash After you enable Flash, refresh this page and the presentation should play. View by Category Toggle navigation. Products Sold on our sister site CrystalGraphics.

Fluid Machinery Design Techniques

Fluid Mechanics. Tags: flow fluid mechanics process thermodynamics. Latest Highest Rated. Fluid Mechanics 1???? Fluid Mechanics Spring ??? Text Book Munson, B.

Ans Descriptive answer Solid-"hard" not easily deformed Fluid-"soft" easily deformed From molecular structure of materials Solid-densely spaced molecules with large intermolecular cohesive forces to maintain its shape, and to not be easily deformed. Fluid-the molecular are spaced further apart, the intermolecular forces are smaller than for solid, and the molecules have more freedom of movement.

Gases ,????? Liquids-ea sily deformed, not easily compressed, -free surface. Gases -greater molecular spacing and freedom of motion with negligible cohesive intermolecular forces. Definition of fluid and how fluids deform A fluid is defined as a substance that deforms continuously flow when acted on by a shearing stress of any magnitude.

When common solids such as steel or other metals are acted on by a shearing stress, they will initially deform usually a very small deformation ,but they will not continuously deform flow. But if the stress exceeds some critical value, the substance will flow.

The study of such material flow is called rheology. Rather, we characterize the behavior by considering the average, or macroscopic, value of the quantity of interest, where the average is evaluated over a small volume containing a large number of molecules.Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. If you continue browsing the site, you agree to the use of cookies on this website.

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fluid machinery ppt

WordPress Shortcode. Published in: Engineering. Full Name Comment goes here. Are you sure you want to Yes No. This will definitely make your life more easier. Adam Sheldon Hello! I do no use writing service very often, only when I really have problems. But this one, I like best of all. The team of writers operates very quickly. Adam Sheldon You can ask here for a help.Most curricular materials in TeachEngineering are hierarchically organized; i.

Some activities or lessons, however, were developed to stand alone, and hence, they might not conform to this strict hierarchy. Related Curriculum shows how the document you are currently viewing fits into this hierarchy of curricular materials. Figure 1. Once they understand how the system operates and put it together, they use it to try to move specific pieces of material.

Engineers use fluid power to impact such areas as lowering fuel consumption in the transportation industries to improving patient care in the medical industries.

fluid machinery ppt

Fluid power can improve our quality of life when engineers and researchers investigate how to use this technology to become more efficient, compact and cost effective. Each TeachEngineering lesson or activity is correlated to one or more K science, technology, engineering or math STEM educational standards. In the ASN, standards are hierarchically structured: first by source; e. View aligned curriculum. Do you agree with this alignment? Thanks for your feedback! Students are introduced to Pascal's law, Archimedes' principle and Bernoulli's principle.

Fundamental definitions, equations, practice problems and engineering applications are supplied. Working in teams, students learn the basics of fluid power design using the PFPD as their investigative platform. With the main components of the PFPD already assembled, student groups determine the correct way to connect the valves to the actuators using colored, plastic tubing. The purpose of this lesson is to teach students how a spacecraft gets from the surface of the Earth to Mars.

Students first investigate rockets and how they are able to get us into space. Finally, the nature of an orbit is discussed as well as how orbits enable us to get from planet to planet — spec Figure 2. The use of fluid power, such as the hydraulics in this bulldozer, helps people do jobs more quickly, safely and economically. All rights reserved. Have ready two balloons, a bottle, water and two matchsticks for simple teacher demonstrations. Also be ready to show the class one or two minute online videos.

Have you ever seen a bulldozer or excavator move a lot of dirt where a new project is being built see Figure 2? Have you been in a chair that you could raise or lower by pushing a lever?

Did you ever open a screen door and notice it closes smoothly and by itself? Did a dentist ever use a drill on your teeth? When you are riding in a car or truck and the driver pushes the brake pedal, do you start to slow down? These are all examples of how fluid power is used in our everyday lives. Fluid power use either a gas pneumatics or a liquid hydraulics.

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Embeds 0 No embeds. No notes for slide. Fluid machinery ppt 1. The mechanical energy, on the other hand, is usually transmitted by a rotating shaft. Force exerted by the jet on the moving plate 1st Case: Force on flat moving plate in the direction of jet Consider, a jet of water strikes the flat moving plate moving with a uniform velocity away from the jet.Chapter 1. Properties of Fluids Chapter 2. Pressure and Its Measurement Chapter 3. Hydrostatic Forces on Surfaces Chapter 4.

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Buoyancy and Floatation Chapter 5. Kinematics of Flow and Ideal Flow Chapter 6. Dynamics of Fluid Flow Chapter 7. Orifices and Mouthpieces Chapter 8. Notches and Weirs Chapter 9. Viscous Flow Chapter Turbulent Flow Chapter Flow Through Pipes Chapter Dimensional and Model Analysis Chapter Boundary Layer Flow Chapter Forces on Sub-merged Bodies Chapter Compressible Flow Chapter Flow in Open Channels Chapter Impact of Jets and Jet Propulsion Chapter Hydraulic Machines — Turbines Chapter Centrifugal Pumps Chapter Reciprocating Pumps Chapter Fluid System.

Note — Due to copyright issue this book is not fully available Only half part. Heat and Mass Transfer By R.

FLUID MECHANICS - PowerPoint PPT Presentation

Rajput Pdf. Basic and Applied Thermodynamics by P. Nag pdf.


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