1) The document discusses the impact of a jet of water on stationary and moving plates. It defines impact of jet as the force exerted by the jet on a plate.
2) Key factors that determine the force include the jet velocity, plate velocity, plate angle, and whether the plate is flat, curved, or includes a series of vanes.
3) Formulas are provided to calculate the force and work done on plates in different configurations based on impulse-momentum principles.
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Minor losses are a major part in calculating the flow, pressure, or energy reduction in piping systems. Liquid moving through pipes carries momentum and energy due to the forces acting upon it such as pressure and gravity. Just as certain aspects of the system can increase the fluids energy, there are components of the system that act against the fluid and reduce its energy, velocity, or momentum. Friction and minor losses in pipes are major contributing factors.
from this ppt you can almost aware about the operation of hydraulic turbines and various specification releated to it...
if you want to attains the knowledge about the turbines then must watch this ppt,... thankyou!
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Governing of the Turbine | Fluid MechanicsSatish Taji
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Minor losses are a major part in calculating the flow, pressure, or energy reduction in piping systems. Liquid moving through pipes carries momentum and energy due to the forces acting upon it such as pressure and gravity. Just as certain aspects of the system can increase the fluids energy, there are components of the system that act against the fluid and reduce its energy, velocity, or momentum. Friction and minor losses in pipes are major contributing factors.
from this ppt you can almost aware about the operation of hydraulic turbines and various specification releated to it...
if you want to attains the knowledge about the turbines then must watch this ppt,... thankyou!
if you want to follow me on twitter then contact me at
ishantgautam51@yahoo.com
Governing of the Turbine | Fluid MechanicsSatish Taji
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CFD Simulation of By-pass Flow in a HRSG module by R&R Consult.pptxR&R Consult
CFD analysis is incredibly effective at solving mysteries and improving the performance of complex systems!
Here's a great example: At a large natural gas-fired power plant, where they use waste heat to generate steam and energy, they were puzzled that their boiler wasn't producing as much steam as expected.
R&R and Tetra Engineering Group Inc. were asked to solve the issue with reduced steam production.
An inspection had shown that a significant amount of hot flue gas was bypassing the boiler tubes, where the heat was supposed to be transferred.
R&R Consult conducted a CFD analysis, which revealed that 6.3% of the flue gas was bypassing the boiler tubes without transferring heat. The analysis also showed that the flue gas was instead being directed along the sides of the boiler and between the modules that were supposed to capture the heat. This was the cause of the reduced performance.
Based on our results, Tetra Engineering installed covering plates to reduce the bypass flow. This improved the boiler's performance and increased electricity production.
It is always satisfying when we can help solve complex challenges like this. Do your systems also need a check-up or optimization? Give us a call!
Work done in cooperation with James Malloy and David Moelling from Tetra Engineering.
More examples of our work https://www.r-r-consult.dk/en/cases-en/
Water scarcity is the lack of fresh water resources to meet the standard water demand. There are two type of water scarcity. One is physical. The other is economic water scarcity.
COLLEGE BUS MANAGEMENT SYSTEM PROJECT REPORT.pdfKamal Acharya
The College Bus Management system is completely developed by Visual Basic .NET Version. The application is connect with most secured database language MS SQL Server. The application is develop by using best combination of front-end and back-end languages. The application is totally design like flat user interface. This flat user interface is more attractive user interface in 2017. The application is gives more important to the system functionality. The application is to manage the student’s details, driver’s details, bus details, bus route details, bus fees details and more. The application has only one unit for admin. The admin can manage the entire application. The admin can login into the application by using username and password of the admin. The application is develop for big and small colleges. It is more user friendly for non-computer person. Even they can easily learn how to manage the application within hours. The application is more secure by the admin. The system will give an effective output for the VB.Net and SQL Server given as input to the system. The compiled java program given as input to the system, after scanning the program will generate different reports. The application generates the report for users. The admin can view and download the report of the data. The application deliver the excel format reports. Because, excel formatted reports is very easy to understand the income and expense of the college bus. This application is mainly develop for windows operating system users. In 2017, 73% of people enterprises are using windows operating system. So the application will easily install for all the windows operating system users. The application-developed size is very low. The application consumes very low space in disk. Therefore, the user can allocate very minimum local disk space for this application.
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Immunizing Image Classifiers Against Localized Adversary Attacksgerogepatton
This paper addresses the vulnerability of deep learning models, particularly convolutional neural networks
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When combined with 3D convolution and deep curriculum learning optimization (CLO), itsignificantly improves
the immunity of models against localized universal attacks by up to 40%. We evaluate our proposed approach
using contemporary CNN architectures and the modified Canadian Institute for Advanced Research (CIFAR-10
and CIFAR-100) and ImageNet Large Scale Visual Recognition Challenge (ILSVRC12) datasets, showcasing
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Final project report on grocery store management system..pdfKamal Acharya
In today’s fast-changing business environment, it’s extremely important to be able to respond to client needs in the most effective and timely manner. If your customers wish to see your business online and have instant access to your products or services.
Online Grocery Store is an e-commerce website, which retails various grocery products. This project allows viewing various products available enables registered users to purchase desired products instantly using Paytm, UPI payment processor (Instant Pay) and also can place order by using Cash on Delivery (Pay Later) option. This project provides an easy access to Administrators and Managers to view orders placed using Pay Later and Instant Pay options.
In order to develop an e-commerce website, a number of Technologies must be studied and understood. These include multi-tiered architecture, server and client-side scripting techniques, implementation technologies, programming language (such as PHP, HTML, CSS, JavaScript) and MySQL relational databases. This is a project with the objective to develop a basic website where a consumer is provided with a shopping cart website and also to know about the technologies used to develop such a website.
This document will discuss each of the underlying technologies to create and implement an e- commerce website.
Cosmetic shop management system project report.pdfKamal Acharya
Buying new cosmetic products is difficult. It can even be scary for those who have sensitive skin and are prone to skin trouble. The information needed to alleviate this problem is on the back of each product, but it's thought to interpret those ingredient lists unless you have a background in chemistry.
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Event Management System Vb Net Project Report.pdfKamal Acharya
In present era, the scopes of information technology growing with a very fast .We do not see any are untouched from this industry. The scope of information technology has become wider includes: Business and industry. Household Business, Communication, Education, Entertainment, Science, Medicine, Engineering, Distance Learning, Weather Forecasting. Carrier Searching and so on.
My project named “Event Management System” is software that store and maintained all events coordinated in college. It also helpful to print related reports. My project will help to record the events coordinated by faculties with their Name, Event subject, date & details in an efficient & effective ways.
In my system we have to make a system by which a user can record all events coordinated by a particular faculty. In our proposed system some more featured are added which differs it from the existing system such as security.
Vaccine management system project report documentation..pdfKamal Acharya
The Division of Vaccine and Immunization is facing increasing difficulty monitoring vaccines and other commodities distribution once they have been distributed from the national stores. With the introduction of new vaccines, more challenges have been anticipated with this additions posing serious threat to the already over strained vaccine supply chain system in Kenya.
Democratizing Fuzzing at Scale by Abhishek Aryaabh.arya
Presented at NUS: Fuzzing and Software Security Summer School 2024
This keynote talks about the democratization of fuzzing at scale, highlighting the collaboration between open source communities, academia, and industry to advance the field of fuzzing. It delves into the history of fuzzing, the development of scalable fuzzing platforms, and the empowerment of community-driven research. The talk will further discuss recent advancements leveraging AI/ML and offer insights into the future evolution of the fuzzing landscape.
2. Impact of Jet
The jet is a stream of liquid coming out from
nozzle with a high velocity under constant
pressure.
Impact of Jet means the force exerted by the jet
on a plate which may be stationary or moving.
The plate may be flat or curved.
This force is obtained from Newton’s 2nd law
of motion or Impulse – Momentum principle.
3. Impulse-Momentum Theorem
The impulse-momentum theorem states that
the change in momentum of an object equals
the impulse applied to it.
For constant mass dm = 0. change in momentum may
occurs due to a change in the magnitude of velocity or
in its direction or due to both.
4. The following cases of the impact of jet, i.e. the
force exerted by the jet on a plate will be
considered:‐
Force exerted by the jet on a stationary plate
1) Plate is vertical to the jet
2) Plate is inclined to the jet
3) Plate is curved
Force exerted by the jet on a moving plate
1) Plate is vertical to the jet
2) Plate is inclined to the jet
3) Plate is curved
5. Force exerted by the jet onVertical Flat Plate
1. When the plate is stationary
Let, V =Velocity of the jet in the direction of x
d = diameter of the jet
a = area of c/s of the jet =
𝜋 𝑑
4
2
6. Consider a jet of water strikes a stationary vertical flat plate as shown
in fig. The jet after striking the plate will deflected through 90°. So final
velocity of fluid in the direction of the jet after striking plate will be
zero.
The force exerted by the jet on the plate in the direction of jet.
Fx = Rate of change of momentum in the direction of force
=
𝐼𝑛𝑡𝑖𝑎𝑙 𝑚𝑜𝑚𝑒𝑛𝑡𝑢𝑚 − 𝐹𝑖𝑛𝑎𝑙 𝑚𝑜𝑚𝑒𝑛𝑡𝑢𝑚
𝑇𝑖𝑚𝑒
=
𝑀𝑎𝑠𝑠 𝑋 𝐼𝑛𝑡𝑖𝑎𝑙 𝑉𝑒𝑙𝑜𝑐𝑖𝑡𝑦 − 𝑀𝑎𝑠𝑠 𝑋 𝐹𝑖𝑛𝑎𝑙 𝑉𝑒𝑙𝑜𝑐𝑖𝑡𝑦
𝑇𝑖𝑚𝑒
=
𝑀𝑎𝑠𝑠
𝑇𝑖𝑚𝑒
[ 𝐼𝑛𝑡𝑖𝑎𝑙 𝑉𝑒𝑙𝑜𝑐𝑖𝑡𝑦 – 𝐹𝑖𝑛𝑎𝑙 𝑉𝑒𝑙𝑜𝑐𝑖𝑡𝑦]
= Mass/sec [Velocity of jet before striking -Velocity of jet after striking ]
= ρaV (V - 0) [Mass/sec = ρ x aV]
= ρaV2
7. 2.When the plate is moving
Let, u = Velocity of the plate
Consider a jet of water strikes a vertical flat plate which is moving with a
uniform velocity. In this case jet strikes the plate with a relative velocity.
Relative velocity of jet with respect to plate = V – u
Fx = Rate of change of momentum in the direction of force
= ρa (V – u)[(V - u) – 0]
= ρa (V − u)2
8. Fx = Rate of change of momentum in the direction of force
= ρa (V – u)[(V – u) – 0]
= ρa (V − u)2
In this case, work is done by the jet on the plate as the plate
is moving,
for stationary plate the work done is zero.
Work done by the jet on the flat moving plate
Wd/sec = Force x Distance in the direction of force/ Time
= ρa (V − u)2 x u
9. 1. When the plate is stationary
Let V =Velocity of the jet in the direction of x
a = area of c/s of the jet
θ = Angle between the jet and plate
Mass of water striking the plate per sec = ρ x aV
Force exerted by the jet on a Inclined Plate
(90º˗θ)
10. Force exerted by jet on the inclined plate in the
direction normal to the plate, Fn
Fn = Mass of water striking/sec x [Initial velocity – Final velocity]
=ρaV (V sinθ – 0)
=ρaV2 sinθ
This normal force can be resolved into two components one in the
direction of jet and other perpendicular to the direction of jet.
Fx = Component of Fn in the direction of flow
= Fn cos (90º – θ) = Fn x sinθ = ρaV2 sin2θ
Fy = Component of Fn perpendicular to the flow
= Fn sin (90º – θ) = Fn x cosθ = ρaV2 sinθ cosθ
11. 2. When the plate is moving
Let V =Velocity of the jet
a = area of c/s of the jet
u =Velocity of the plate
θ = Angle between the jet and plate
In this case jet strikes the plate with a relative velocity.
Relative velocity of jet with respect to plate = V – u
Mass of water striking the plate per sec = ρ x a(V–u)
12. Force exerted by jet on the inclined plate in the direction
normal to the plate, Fn
Fn = Mass of water striking/sec x [Initial velocity – Final velocity]
=ρa(V–u)((V–u)sin θ – 0)
=ρa(V–u)
2
sin θ
This normal force can be resolved into two components one in the direction of
jet and other perpendicular to the direction of jet.
Fx = Component of Fn in the direction of flow
= Fn cos (90º – θ) = Fn x sin θ = ρa(V–u)
2
sin2θ
Fy = Component of Fn perpendicular to the flow
= Fn sin (90º– θ) = Fn x cos θ = ρa(V–u)
2
sinθ cosθ
Wd/sec = Fx x u
= ρa(V–u)
2
sin2θ x u
= ρa(V–u)
2
u sin2θ
13. 1. Plate is stationary and Jet strikes at the centre
Force exerted by jet in the direction of jet (x – axis)
Fx = Mass/sec X [ V1x – 𝑉2𝑥 ]
Where, V1x = Initial velocity in the direction of jet = V
V2x = Final velocity in the direction of jet = –V cosθ
[–ve sign indicates velocity at outlet is in opposite direction of the jet of water coming out from nozzle]
Fx = ρaV [V – (–V cosθ)]
= ρaV2 [1 + cosθ ]
Force exerted by the jet on a Curved Plate
14. 2. Plate is moving and Jet strikes at the centre
Relative velocity of jet with respect to plate = V – u
Force exerted by jet in the direction of jet (x – axis)
Fx = Mass/sec X [V1x – 𝑉2𝑥 ] Where, V1x = V – u , V2x = –(V – u) cosθ
Fx = ρa(V − u)[(V − u) – (–(V − u)cosθ)]
= ρa(V − u)2 [1 + cosθ ]
Wd/sec = Fx x u = ρa(V − u)2 u [1 + cosθ ]
15. Jet strikes the curved Plate at one end tangentially
The curved plate is symmetrical about x-axis. So the angle made by tangents at the two
ends of the plate will be same.
Let,
V =Velocity of the jet
θ = Angle made by jet with x-axis at inlet tip of the plate
Force exerted by jet in the direction of jet
Fx = Mass/sec X [ V1x – 𝑉2𝑥 ]
Fx = ρaV [V cosθ – (–V cosθ)]
= ρaV [V cosθ +V cosθ)]
= 2ρaV2
cosθ
Force exerted by the jet on a Stationary
Curved Plate (Symmetrical Plate)
16. Jet strikes the curved Plate at one end tangentially
The curved plate is unsymmetrical about x-axis. So the angle made by tangents at the
two ends of the plate will be different.
Let,
θ = Angle made by jet with x-axis at inlet tip of the plate
ϕ = Angle made by jet with x-axis at outlet tip of the plate
Force exerted by jet in the direction of jet
Fx = Mass/sec X [ V1x – 𝑉2𝑥 ]
Fx = ρaV [V cosθ – (–V cos ϕ)]
= ρaV [V cosθ +V cos ϕ)]
= ρaV2
[cosθ + cos ϕ)]
Force exerted by the jet on a Stationary
Curved Plate (Unsymmetrical Plate)
17. Force exerted by the jet on an
unsymmetrical Moving Curved Plate
18. V1 = Absolute velocity of the jet at inlet
u1 =Velocity of the vane at inlet
Vr1= Relative velocity of the jet and plate at inlet
α = Angle between the direction of the jet and direction of motion of the
plate at inlet = Guide blade angle
θ = Angle made by the relative velocity , with the direction of motion of the
vane at inlet =Vane/blade angle at inlet
Vw1 and Vf1=The components of the velocity of the jet , V1 in the direction of
motion and perpendicular to the direction of motion of the vane respectively.
Vw1 =Velocity of whirl at inlet
Vf1 =Velocity of flow at inlet
V2 = Absolute velocity of the jet at outlet
u2 =Velocity of the vane at outlet
Vr2= Relative velocity of the jet and plate at outlet
β = Angle made by the velocity V2 with the direction of motion of the vane at outlet
Φ = Angle made by the relative velocity, Vr2 with the direction of motion of the vane at
outlet =Vane/blade angle at outlet
Vw2 =Velocity of whirl at outlet
Vf2 =Velocity of flow at outlet
19. If the vane is smooth and having velocity in the direction of motion at inlet and
outlet equal then we have,
u1 = u2 = u =Velocity of vane in the direction of motion of vane
and Vr1 = Vr2
Mass of water striking the vane per second, m = ρaVr1
Force exerted by the jet in the direction of motion,
Fx = mass of water striking per sec X [Initial velocity with which jet strikes in
the direction of motion – Final velocity of jet in the direction of motion]
Initial velocity with which jet strikes the vane = Vr1 and
component of Vr1 in the direction of motion = Vr1cosθ = (Vw1 − u1)
Similarly, component of Vr2 at outlet = −Vr2cosϕ = −(Vw2 + u2)
Fx = ρaVr1 [Vr1cosθ − (−Vr2cosϕ )]
Fx = ρaVr1 [(Vw1 − u1) + (Vw2 + u2)]
As we know u1 = u2
Fx = ρaVr1 [Vw1 + Vw2]
Work done per second on the vane by the jet,
W = Fx x u
W = ρaVr1 u [Vw1 + Vw2]
21. The force exerted by a jet of water on a single moving
plate is not practically feasible. Its only a theoretical one.
In actual practice, a large number of plates/blades are
mounted on the circumference of a wheel at a fixed
distance apart as shown in Fig.
The jet strikes a plate and due to the force exerted by the
jet on the plate, the wheel starts moving and the 2nd plate
mounted on the wheel appears before the jet, which again
exerts the force on the 2nd plate.
Thus each plate appears successively before the jet and jet
exerts force on each plate and the wheel starts moving at
a constant speed.
22. Let, V =Velocity of jet,
d = Diameter of jet
u =Velocity of vane
In this case the mass of water coming out from the nozzle per second is always in
contact with the plates, when all the plates are considered.
Hence, mass of water per sec striking the series of plates = ρaV
Also, The jet strikes a plate with velocity =V − u
After striking, the jet moves tangential to the plate and hence the velocity component
in the direction of motion of plate is equals to zero.
Force exerted by the jet in the direction of motion of plate,
Fx = ρaV [(V − u) − 0]
Fx = ρaV (V − u)
Work done by the jet on the series of plates per second,
W = Fx x u
W = ρaV (V − u) x u
W = ρaV u (V − u)