Centrifugal Definition and 344 Threads

dear guys how are u ?? i ve a problem with selecting a centrifugal pump for circulating water in a closed system this system consists of tank , pipes up to 60 meters with 2 inch dia , then these pipes deliver water to a tube contains pressurized nitrogen @ 10 bars then return back to tank and...

When a centrifugal pump is running, how much energy is required to fight against the coriolis force of the spinning water mass that flows from center toward the circumference? I have done some simple experiments with a tube. The tube have a water inlet in the middle of its length, so the open...

In circular motion why the centripetal and centrifugal not get cancelling. .?

Hello, I am to design a pump for the cooling circuit of a 4-stroke, 4-cylinder gasoline engine. The engine has already been designed. I am currently referring to Pump Handbook (McGraw Hill publications) and trying to get a hold of Centrifugal Pumps-Design & Application (Ross-Lobanoff). One...

What happens to gas temperature in different parts of closed chamber (let's say for arguments sake, a closed cylinder made out of material that transduces heat minimally) that is rotated centrifugally so, that one end of the chamber experiences much greater centrifugal acceleration than the...

I came across this http://en.wikipedia.org/wiki/Reactive_centrifugal_force" I think this is Wikipedia nonsense. There is only one centrifugal "force" and it is the inertial effect or "pseudo force" or "fictitious force" observed in a non-inertial frame of reference. The authors of these...

we wouldn't experience the centrifugal force unless we change direction. Suppose we are flying an twin engine airplane and one side engine fails, to counteract this the pilot applies opposite rudder and flies straight. Would we experience the centrifugal force and does the turn indicator...

Hi PF! I have a question regarding the use of centrifugal pumps. I have a system with a constant flowrate of water at 2m^3/s pumping water from a lower to a higher reservoir. The inlet condition is a head of 10m. The Height of the upper reservoir will vary from 83m in the beginning to 287m...

Maybe misspelled, i know. What is the difference between the two?? Please explain.

What is the correct way to put limitation on different aircraft flying conditions with respect to the cavitation point of view of the Fuel booster pump in the aircraft? The pump is immersed in the fuel and the fuel tank is vented to atmosphere(in atmospheric pressure, which will change with...

Please correct me if I am wrong in any of this 1) Electrons are able to go around the nucleus of an atom due to the centrifugal force resulting from the weak/strong force (one of them) 2) Quantum physics says that particles can be in 2 places at the same time. 3) Therefore can't an electron...

Hi everyone! I have a question and I would be so thankful if you could help me! For a Centrifugal Gas Compressor, if I have the flow rate, the input and output temperatures and pressures in specified rpm, then could I calculate its needed work, isentropic head and efficiency? how? Thanks! Sara

Hello everyone, I'm new to the forum here and have a question that is probably fairly easy for engineers to answer. I'm searching for a clutch that provides the same functionality as a seat belt clutch, i.e. it rotates both directions at slow rpms but when pulled quickly in ONLY one of...

In a "Rotor-ride" at a carnival, people are rotated in a cylindrically walled room (think of a ride like the gravitron). The room radius is 4.6m and the rotation frequency is .4 revolutions per second when the floor drops out. What is the minimum coefficient of static friction so that the...

Homework Statement I have attached a copy of the homework as there is also a picture of the pump. This problem is number 6. A centrifugal pump processes j = 18m3/min of water, with inlet and outlet velocities of v = 15m/s. The impeller rotates in the clockwise direction around the...

Homework Statement 10 lbs. steel wheel with its center of gravity at 6 inches from the axle rotating within a circular frame at 7200 rpm Homework Equations 10lbs. x 6 inches x 72002rpms x 0.000028416(constant) = 88,385 lbs. The Attempt at a Solution 10 x 6 x 72002 x 0.000028416...

Homework Statement Figure is attached. In an amusement park ride called the hammer a large beam rotates in a ver- tical plane about a central pivot (see figure). Cages are attached to the end of the beam; these rotate independently. The riders are strapped to the walls of the cages. The...

Hello, I'm designing for a rotating swivel assembly that will be used for a high pressure cutting system. The rotary swivel is set for an allowable 2800 bar of pressure but has to rotate at 300 RPM while allowing a pressure of 12-15,000 psi pass through it. My question consists of two...

simple centrifugal force problem please help i have a 2m long tube spinning around its center at w=1 theres a 1 kg projectile at 1 m distance from the axe inside the tube that is released at a certain moment what speed does the projectile have when it leaves the tube? please show me...

Hello. I am in need of some assistance regarding a theoratical problem I have. It goes something like this: Imagine a vertically placed axle, rotating at a constant angular velocity (omega). From the middle of this axle extends an arm and on the edge of that arm is a unit containing...

Homework Statement In order for a satellite to move in a stable circular orbit of radius 6736 km at a constant speed, its centripetal acceleration must be inversely proportional to the square of the radius r of the orbit. What is the speed of the satellite? The universal gravitational constant...

Hello all, I am having problems working out the weight I require for as braking system. I have a wind unit bringing me 1kw of power through a standard generator. However the wind I catching is far stronger than my generator can take, anything over a KW will kill my unit so I decided to make...

I am trying to understand how centrifugal force works when applied to a train. For example, if I had a train that had zero super elevation, was traveling along a curve, of some radius at some speed then the centrifugal force acting on the train would be of a certain magnitude which would act...

Hello I was wondering if centrifugal force had a gradient, what i mean by this is this:- A train is traveling on a straight section of track with no centrifugal force. The train then travels along a transition, as the train travels along the transition, the centrifugal force builds up...

Homework Statement I have this exercise which says: An airplane moves along a circular path of 150 meters radius, contained in a vertical plane with constant speed module 200km / h. a)Determine the force resulting from the interaction between the seat and the pilot, whose mass is 80kg, at...

What happens with the sea level due to the centrifugal acceleration?

Please help - I am trying to figure out the stress in a hyperbolic disk rotating at some RPM. The best equations I could find (and example) is from the book "advanced Strength of Materials" by J. P. Den Hartog. Google books shows page 62 with these formulas: Thickness (t) = ti/(r^{q}) where...

If pump's motor load is around 33 ampere and 48 volts, how do you calculate the maximum flow and the head? Note the it is a vertical centrifugal pump

Hi, my math and physics are poor so please bear with me. I have an bifurcated asteroid - 2 components. A sphere diameter 1.5km (m1) and a larger sphere, 2km in diameter (m2). The spheres are touching. System spins around the long axis. Assuming both bodies have internal strength (not...

Homework Statement [PLAIN]http://img194.imageshack.us/img194/2062/57916122.png Homework Equations F_{gravitational}= \frac{MmG}{r^2} F_{centrifugal}= \frac{mv^2}{r} The Attempt at a Solution I got this: dF_{centr} = dF_{grav} \longrightarrow \frac{dm \cdot v^2}{R+x} =...

Homework Statement Basically, this is the problem. [PLAIN]http://img180.imageshack.us/img180/3598/physicsproblem.png It's related to some design research I'm doing regarding a centrifugal control valve. This is a type of valve that controls the fluid flow based on the centrifugal...

http://img441.imageshack.us/img441/9222/85615861.jpg Uploaded with ImageShack.us Homework Statement The picture speaks for itself: one man "A" is standing of a rotating disk whose angular velocity is \omega CCW, and another one "B" is standing still on earth. I'm riquired to find the...

Hello everyone, Ok so I read that the reason they are in free fall is because they are going in a circle like this , and the Earth curves away from them at the same time or something, could anyone explain it to me simply. Also why don't astraunauts get pushed to the periphery of the...

Hi! Can someone explain this expression for the centrifugal force? F = -mw x w x r, where the underline refers to vectors. (sorry for notation) w is the angular veolcity, m mass, a r is the radial vector. I can't really see where the expression comes from. Can you indentify and...

what is pseudo force and centrifugal force? can anyone differentiate between them? is one a special case of the other?

Hi... I have kinda made this problem up myself. How would one calculate the effect of the centrifugal force over a curve. For instance the following problem is taken from Physics GRE test GR8677 Question 6, but I have modified the question. The question states. A particle is initially at...

Hi... I have kinda made this problem up myself. How would one calculate the effect of the centrifugal force over a curve. For instance the following problem is taken from Physics GRE test GR8677 Question 6, but I have modified the question. The question states. A particle is initially at...

I found this on Wikipedia for the equation relating to centrifugal force. F = d/dt (m*v) So I have my mass and velocity but I just multiplied the two, that can't be correct can it. You have to derive something I imagine. Also would the units just be in lbs or Newtons. I'm using feet/s...

Hi, I've read about the balancing of rotating masses. In the context every author(even J.E.Shigley in his book Theory of machines & mechanisms) mentions that a rigid body while rotating, it experiences a "Centrifugal Force" . Now we know that centrifugal force is a pseudo force when we analyze...

Say the force is 1g for an object rotating around an axis. If the object is a platform that is facing the center how would forces act on an item placed at different areas on the platform? Thanks.

I thought this may be an isolated idea but on doing a search on the web, there seems to be a common interest in the idea that centrifugal force reverses near a black hole. Below are a couple of links- http://www.npl.washington.edu/av/altvw55.html"...

centrifugal blower ? how can i test a centrifugal blower ?

2 identical parallel centrifugal pumps ? hello everyone i have a very confusing problem with a cold water system sonsists of 2 identical centrifugal pumps their position is under the tank so there is always a +ve suction head then those pumps takes water from the tank and deliver it to a very...

how to obtain a centrfugal pump curve ? and how can say from the sound of the pump if its running under cavitation or not ?? and what's the cavitation signs for the pump

Hi everyone I'm new. I had an odd thought when thinking about centrifugal compressors. Take a normal straight veined compressor. Normally it just sucks the air straight in and has to accelerate it effectively from zero to however fast it ends up going. But what of you modified the...

ell let's say there's a cabin and its rotating about its axisand we have a block of mass m placed (not at the the centre of the cabin) and there's some friction between the the block and the surface now let's say the speed of the cabin is increased a lil high so that friction can no more...

Helium balloon "centrifugal" force Homework Statement Assume that you are driving down a straight road at a constant speed. A helium-filled balloon is tied to a string that is pinned to the front seat. Which way will the balloon swing when you apply the brakes? Explain why. Homework...

I do not know which forum to place this in so it is here Why has NASA so completely resisted ever experimenting with rotation in space to provide "artificial gravity" to mitigate the effects of weightlessness on humans?

I would like sources for centrifugal compressor design. Anything, such as books, e-books, journals, websites, etc. will do.

Is there any relation of gravity with centrifugal force & gyroscopic effect? Rotating body shows centrifugal force due to radial acceleration α=rω2. This causes force just like gravitation force. Rotating gyroscope doesn’t fall & maintain motion. This is just like anti-Gravity. Can I say that...