Turbine Definition and 515 Threads

Hi, I'm going to design a savonius turbine, and image below is my turbine blade with dimension. But I not sure how to determine the "bucket gap width, S" and "gap width ratio, s/d" is there any calculation method for them?? thanks

Homework Statement During startup of a power plant, a turbine accelerates from rest at 0.43 \rm {rad/s^2}.How long does it take to reach its 3200 \rm {rpm} operating speed? How many revolutions does it make during this time? Homework Equations The Attempt at a Solution

Hi all, I'm hoping that someone may be able to help! I'm doing a project which has involved me looking at the use of superalloys in Gas Turbine engines (i.e. Rolls Royce, GE etc). As part of that I am looking in particular at the use of Chromium within these engines, does anybody have any...

my aim is to lower the cut in speed of the horizontal turbines. I know wind speed has a brutal effect on turbine output, so I want to use horns to speed up air. I plan to put a horizontal axis turbine in the midle of the hexagon You see on the pic. Each side of the hexagon is like a...

i know climate science is pretty inaccurate at the moment and its difficult to predict the effects of lowering carbon emissions but just as an interesting topic i was wondering roughly how many lives each wind turbine will save? what i mean is how much carbon dioxide will be saved from the...

I'm trying to determine the feasibility of a project, but have not yet taken fluid dynamics (next quarter). I'm trying to figure out how much power could be produced with a CO2 powered turbine. The turbine will be activated for only a few seconds at a time, with speeds under power ranging...

As part of a wind turbine design project, I have come to selecting the most appropriate coil and permanent magnet configuration. The aim is to design a turbine capable of 3kW (max), and approximately 300rpm. It will use mechanical furling to regulate speed. So far, I have only seen...

As I understand it, a tesla turbine runs by injecting steam, or some other gas onto the outside of several disks mounted parallel to each other on a shaft. The gas is directed roughly tangent to the outside of the disks and it exits through openings in the center of the disks. Seems straight...

so I am still very much confused about the quantitative analysis of Francis turbine, so i wrote a small program. I have attached a copy of the results. Everything is fine, the results do match the normal circumstances. But upto speed 110, degree of reaction(R in the table) is negative, and...

Hey! I am trying to find some figures on the environmental conditions a turbine blade in a Jet Engine would have to withstand, and the materials that are necessary to prevent the blade from failing. I have taken the example of the 'Trent Engine' or so I think it is called. I have read that...

Nope. I'm still having trouble. I asked about this before, but it's still not gelling for me. There's a wind turbine on the "front lawn" of the city of Toronto that I pass every day. Its blades are never more than ~20 degrees from flat, i.e the blades are almost perpendicular to the flow of...

Hello I am new to these forums and probably will be here for a long time. I am looking for a 3D model of a steam turbine I can play with in either CATIA, ANSYS, or Solidworks. I just want to run thermodynamic simulations and not modify any mechanical or structural components. I have been looking...

I see a lot of references to the 'efficiency' of the Tesla turbine, however, I can't find any actual data. Does anyone have a handle on actual achievable efficiencies of the tesla turbine?

hi guys, i was hoping someone could possibly help me out with a problem i am having. please take a look at the attached picture. i am modeling a turbine blade, trying to find how different configurations for internal cooling configuration affect the overall temperature distribution in the...

Hi I've a wind turbine which have to run under a very low wind speed, from 2-3m/s. Currently, I'm using Envirotek V20, the result is around 1.5V-2.5V, and current is 0.3mA or nearly zero. My aim is to achieve 50W. Any suggestion for the alternator which I should use? p/s: without...

A steam turbine in a power plant accepts 4500 kg/hr of steam at 60 bar and 500°C and exhausts steam at 10 bar. Heat transfer to the surroundings (Tsurr = 300K) at a rate of 70 kW. (a) What condition needs to be satisfied for the turbine to generate the maximum possible power? I said...

hi, i was hoping someone could help me with a problem i am having. i have a 2D turbine blade, with many holes of different diameters through it that represent the cooling passages. i am trying to find an analytical solution of the temperature distribution so i can compare it with...

Homework Statement The turbine produces current that is at 12kV. To lessen the problem of Ohmic heating, a transformer steps up the voltage to 138kV for power line tranmission. Homework Equations Np/Ns=Vp/Vs ?

While doing experiments on a francis turbine, i noted that the discharge decreases when the load on shaft was increased, =>the speed was decreased. I was(in fact, I am) kind of confused about why it dropped, I did consult some text but didnt get any right reason. I thought that since the blade...

Hi All, I'm a junior in HS. I have a research project due this semester for Physics B (first year introductory college physics). Last semester I did some research on boundary layers, friction loss in pipes. This semester I've decided to do some investigation on air breathing rocket...

3 phase alternator. any good links to*** is what I meant in the title

Hi, I need with the following question. Argon gas expands in an adiabatic turbine from 3MPa and 750 C to .2 MPa at a rate of 5 kg/s. Neglect KE and PE effects. Find maximum power output. I know I need to first find the temperature of state two and then use that to solve for h2 (I have...

Does anyone know of somewhere I could find some documentation on how to create a wind turbine?

Hello, For sometime now I've been into electronics and i have forgotten most of my meager knowledge in thermodynamics. . Could you explain how a convergent-divergent nozzle works ? Steam at high temperature and high pressure but relatively low speed enters into the nozzle. Then why...

Homework Statement An electric-generator turbine spins at 3600rpm . Friction is so small that it takes the turbine 16.0 min to coast to a stop.How many revolutions does it make while stopping? Homework Equations The Attempt at a Solution (3600rev/min)(16.0min)=57600 i...

hi everyone: i have a question about gas turbines : i am working as instrumentation engineer( beggar ) at a power station .. we use gas turbine GE ( mark V) frame 9 . i got that alarm : exhaust thermocouple # 10 fail , drop number 123 if anybody working in such a field can help me in...

Hello... new to forum... I am looking into design of a forced air turbine that will drive a generator and flywheel. The flywheel would be utilized for short periods of zero air supply and as an energy resevoir to maintain revs at an optimum level. Dimensions: Turbine/AC generator/flywheel...

Hi everyone. I am having extreme trouble finding the answer to this problem. I thought I originally had it, but nope. The original Q is: "Assume a wind turbine with a hub 50 meters above the ground, a rotor diameter of 65 meters and a wind-conversion efficiency of 25 percent. The turbine...

I have my solar power planned out...1200 2 inch mirrors on plywood that will be aimed at the sun and will have a focal pint about 4 feet from the board. i know how to make the steam system but i haven't a clue how to make a working turbine to create electricity. (steam will be the way of...

If supposing we were to add a wind turbine connected to a generator to a moving car, would we be able to get the air flowing around the car to turn the turbine and therefore gain some energy? If it is possible, is it economical? if it is, is it practical? would there be a loss? would there be...

I have read a bit about Tesla turbines and their amazingly high RPM output. I have also read that they don't product much torque, which is possibly why they haven't been used in anything more than dentist's drills and other things requiring speed but not high torque. How much power could one...

I know that confinement and stability are a big issues when it comes to harnessing fusion power in a controlled fashion, but what if we could do away with the stability constraint? (sorry if this is completely unfeasible, I don't really know very much about plasma and discharge physics). My...

I was just swimming with a floating board for the pool, and came up with a thought. What would happen if you had two tubes one filled with air, and the other one filled with water. If you could somehow get an object less than half the density of water to fall down the tube with the air and go...

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hello, i have a project of a small turboshaft turbine with regenerator to produce a power of 140 kW, with aplications on ligth helicopters and industrial co-generation. does aonyone knows here i can find some references about te eficciencies of the components, such as compressor, turbine...

Any such thing as "small steam turbine"? I've a C-Band satellite dish. I'm going to attach 2" mirrors to the entire reflecting surface and aim it at the sun. Where the feedhorn was, I'm going to design some type of coil to pump water through which the focused sunlight will boil the water...

Again another homework question, all help greatly appreciated A gas turbine plant is fuelled by Methane,. After compresssion the air and fuel enter the combustion chamber at a temp of 600K and excess air is supplied in order to limit the temp of the combustion products to 1200K after steady...

I'm doing an experiment (at A-Level) to see the efficiency of a wind turbine. I'm doing this by changing the number of blades and varying the wind speeds. I wondered if anyone had an equation that could look at efficiency? I have the current and the voltage (and wind speed). Sorry if I've...

Hello guys, I'm a second year BSc aerospace student in Holland, and I'm thinking about making a gas turbine engine. I hope to specialize in powerplants eventually. You people seem knowledgeable, so I thought I'd ask my question here. Anyway, bare with me a bit... I first thought about...

Hi, i m elect. engg and i want to help frm mech ppl here, Why the turbine has stages like hp, ip and lp? Why not a single long turbine? I also want to know that if we want to trip a large turbine used at power plant, how much time it takes to stop the steam supply. I mean can steam valve be...

can anybody please tell me the temperature (degrees Celsius please.) there is at the back of a normal turbine jet engine (or something like that:-p )?? i couldn't find it on wikipedia or something like that:frown: so i ask it here:approve:

I've been thinking about the wind turbine (horizontal turbine - like an airplane propellor.) that I pass on the way downtown and I'm realizing I've been taking for granted how it works. Seems to me it's exactly opposite of an airplane wing. Rather than forward speed generating lift, you have...

HI folks, new to this forum.I posted this on a different thread, but this seems the better location... it's a conceptual question. I'm in a Fluid Dynamics class and need to make a presentation on Bernoulli's conservation of energy equation as it applies to wind turbines. I think I...

HI folks, new to this forum. I'm in a Fluid Dynamics class and need to make a presentation on Bernoulli's conservation of energy equation as it applies to wind turbines. I think I understand the different energies involved here: kinetic(v^2/2), pressure(P/rho), potential(zg)... I want to...

Is there any aero engine in the world without any rotating bodies like compressor-turbine? Other than ram jet or scramjet. Thers is a vague idea in my mind to go for an aero engine without rotating elements in it. I just wanted to confirm if it is there.

Our "safety analysis for nuclear power plants" professor asked for an FMEA worksheet and i used some of the malfunctions mentioned http://www.cti-simulation.com/ctisimulation/PWR.htm" , but i don't really get what was meant by the turbine runback, and hence i don't get the fault here. And I've...

Hi, I was told that there was an inherent torque advantage to using a piston design over a turbine design (in this case for steam). I said I doubted there was any theoretical reason why this would be true, it would all depend on the design of the engine. My argument was that most turbines in...

Another question. If your given the quality coming out of the turbine. Why do you use say H2 = Hl + xv(Hv - Hl) to determine a xv even though u hav one given?

Why is it when the conditions are adiabatic and reversible about a turbine, the assumption is its isentropic?

Hello all I am posting on this site to ask for help with my Theory section of a experimental investigation, below is what I have done so far, my teacher has asked for the theory to be able to be understood by a average high school maths student that does not study physics. The experiment used...