Engine Definition and 999 Threads

Homework Statement I am modelling an engine, I have attached a picture of my model. It is the basic engine model that comes with Simulink, with my attachments included. My question is, how and where do I enter my own values? I'm pretty new to using Simulink, so I don't really know where...

Hey people I intend to self learn IC engines. I am a a little confused by what this sentence says in my textbook. "An idling engine is one which operates at no load and with nearly closed throttle" I basically want to know what loading means in this particular context? And what else can...

Homework Statement A rocket is launched at an angle of 58.0° above the horizontal with an initial speed of 98 m/s. It moves for 3.00 s along its initial line of motion with an acceleration of 28.0 m/s2. At this time its engines fail and the rocket proceeds to move as a free body. Maximum...

So I'm looking and researching to build a small liquid-fueled rocket engine. So far I think my choice for fuel is definitely unleaded gasoline because of it's high impulse when mixed with Gas-state O2 and how easy it is to obtain. Previously, I was looking at using Hydrogen Peroxide (H202) for...

Hi. Im trying to measure the efficiency of a heat engine. I therefore need to work out what the input energy is to the heat engine. I have two problems. Firstly, how should I measure the heat going into the stirling rather than the heat coming out of the heater. Is it ok to measure the...

Homework Statement The flywheel of a steam engine begins to rotate from rest with a constant angular acceleration of 1.33 rad/s2. It accelerates for 23.5 s, then maintains a constant angular velocity. Calculate the total angle through which the wheel has turned 67.3 s after it begins...

Homework Statement A house is heated by means of a carnot engine operating in reverse (Heat Pump). The outside Temperature (Tc) is 270k, and the required inside temperature (Th) is 300k. If heating the house to this temperature normally requires 10kW of electrical heating, how much power is...

I think that we may try to simplify free piston engine and it may look just like hollow cylinder made of very heat resistant material in which big cylindrical permanent magnet is moving back and forth horizontaly.The most heat resistant magnets could withstand temperatures up to 800°C (curie...

I am trying to design a low cost solar/steam engine for deployment where clean water and electricity are scarce. The prototyping I am currently doing is being done using plywood and a CNC router (mainly because that is what I have at my disposal). This will almost certainty not work as an end...

Homework Statement Rank these engines on the basis of their designed power output and their thermal efficiency. 1) Qin = 3000 J, Qout = 1500 J, f=150 Hz. 2) Qin = 4000 J, Qout = 3000 J, f=50 Hz. 3) Qin = 1000 J, Qout = 200 J, f=200 Hz. 4) Qin = 2000 J, Qout = 500 J, f=50 Hz. 5) Qin...

Just wondering if an idea I've had for a few years would actually work. If I had an engine where compression took place externally and the engine was only used for combustion for example. This engine would be direct injected. The fuel would be injected a very high pressures (common rail)...

http://www.google.com/hostednews/canadianpress/article/ALeqM5glnWkF4OYX0NZkxYhONr04DXvNOQ?docId=5045790 Two in two days? That seems unlikely.

Homework Statement The hot reservoir of a heat engine is steam at 100^ C while the cold reservoir is ice at 0 C. In 1.3 hr of operation, 11 kg of steam condenses and 52 kg of ice melts. Homework Equations I think power output is W=Qin-Qout The Attempt at a Solution I believe the...

Trying to get a link that works. http://news.google.com/?hl=en-GB Qantas grounds A380s after engine blast The Australian - Steve Creedy, Peter Alford - ‎1 hour ago‎ Firefighters surround the Qantas superjumbo after it made an emergency landing at Changi airport in Singapore following an...

What are all the given aspects of this? I understand how the reaction happens, but what about it pushes the piston.

Here's what the plan is I need a dyno for a new engine development program. small displacement engines, 50cc some day up to 200cc+. I need comparative data engine to engine, tuning, proto components, etc.. this is all diy budget stuff please keep this in mind. I come from automotive and race...

Homework Statement The jet engine of an airplane takes in 130 kg of air per second, which is burned with 4.3 kg of fuel per second. The burned gases leave the plane at a speed of 600 m/s (relative to the plane). If the plane is traveling 260 m/s, determine the power (hp) delivered...

Homework Statement I need to find required thrust power for lockeed s3a. I know Thrust=Drag in horizontal flight. For take off, need to use the take off angle, split the Weight (G) into 2 components using the takeoff angle... Same for landing. Given: G=19278kg ---> 19278*9.81=189,1kN...

Can anybody help me how to calculate the quantity of heat radiated from an diesl engine. any formula based on BHP? what are the assumptions that i need to make? what are the factors that i need to consider whilem calculating the heat radiated from an diesel engine

Hello, This is my first post and if anyone can direct me to any links that would help I would appreciate it, but I'm having trouble understanding this on my own. I am developing a game with a physics engine and the scope I have in mind would require these calculations. I understand some of...

I am trying to replicate a JAVA based applet on MATLAB. Applet can be seen http://www.engr.colostate.edu/~allan/thermo/page6/EngineParm1/engine.html" . The theory behind the functions of the applet is http://www.engr.colostate.edu/~allan/thermo/page6/page6.html" . It is actually a finite...

Hi, I am using a model that estimates pressure (P) in an intake manifold. I think there is a mistake in its equations but I cannot find it. To simplify the problem we can make the following assumptions: - Only air fills the manifold: air comes into the manifold through the throttle (mass...

Homework Statement An ideal monatomic gas is the working substance of a Carnot engine. During the isothermal expansion, the volume doubles. The ratio of the final volume to the initial volume in the adiabatic expansion is 5.7. The work output of the engine is 9x10^{5}J in each cycle. Compute...

I found following claim from an inventor: “The limit of IC engine efficiency cannot be normally exceeded due to facts entropy cannot be decreased and 2nd law of thermodynamics (heat cannot flow from cold to hot body). Injecting water in the beginning of expansion stroke can overcome these...

ok here's the problem. i really need on this. its not a calculation but more of an explanation. Consider a rocket engine. It delivers a constant thrust, which is the force exerted on the rocket by the expanding exhaust gases from the burning fuel.This typically is true in real life:both the...

Hi guys... we are currently interested -in our clip of aerospace engineering in my uni.- to build a complete jet engine ... unfortunately.. we have not yet found any detailed explanation to each step in doing so .. if you have any link or uploaded book or even you remember some manuals...

1. You're in an airplane that flies horizontally with speed 1000 km/h (280 m/s) when an engine falls off. Neglecting air resistance, assume it takes 30 s for the engine to hit the ground. a. Show that the airplane is 4.0 km high. b. Show that the horizontal distance that the aircraft...

Can anyone please explain me what is difference between Full Authority Digital Engine Control and ELectronic engine control in an aircraft gas turbine Engine ? What all parameters are controlled in EEC and FADEC ? What is the main difference ?

i understood brayton cycle etc.. but why is air compressed in the GT engine ? iS is anything related related to following reasons ? 1. FOr better combustion of fuel, if so why ? 2 IS it to increase the temperature of air, if so why ? 3 any other reason

Hi Engineering guys, why you can't think about modifying the locomotive engine fender to push away human beings and animals from track. You know, each day there are hunderds of human beings are getting trapped under the wheels of locomotives. Can you guys think about modifying the fender -...

I was taking apart a 2-stroke engine for a model aircraft and I'm a little confused about the types of bearings used for the connecting rod and crankshaft. So far, I know of the journal, needle, tapered roller, ball, and angular contact ball bearings. Does the connecting rod use a journal...

I have an spark ignited 4 cylinder 2000 cc engine in a wagon and I think its 50% thermally efficient at idle due to the mods I have done on the intake manifold. My engine uses (mesured on video) roughly 9.807 cc/min at approx 750 rpm and the only reference I have come across is a similar...

I think it is due to friction and the carnot efficiency is derived in a reversible cycle. Also,can i build just a little bit irreversible but still carnot? But if irreversible how can i draw the graph? Still smooth line?

hey guys, We have a design project where we are supposed to design something cool to machine and later auction it off. My group has already come up with a plan to build a small stirling engine. I've been thinking if there could be anything we can add on to it, like a useful/fun addon...

Homework Statement A Carnot heat engine operates between temperatures Th and Tc. (a) If Th = 515 K and Tc = 363 K, what is the efficiency of the engine? 0.30 Your answer is correct. (b) What is the change in its efficiency for each degree of increase in Th above 515 K? ? K-1 (c) What...

Hello all. I've been wanting to build a Stirling engine at home out of parts that i could easily afford/scrounge up. Not one of those small ones that you hold in your hand, but one that could generate some real work. Enough to run a small generator maybe. The problem is that i have absolutely no...

Hello, For a reversible heat engine between temperatures T_1 and T_2, the ratio of heat going in and out the engine is \frac{Q_1}{Q_2} = \frac{T_1}{T_2} (second law). Say T_1 = 200 K and T_2 = 273 K, then heat goes from 2 to 1 and as we can see, the ratio of heat that goes in the engine is...

one problem, the website is down, and has been for quite some time now. lots of info on the site great candidate for a high efficiency diesel engine.

I wanted to ask about plasma propulsion engine. Plasma can be made by using radio waves. How this part of device looks like?(I know something, like an antenna, is used) I searched the net, but I didn't find anything. Thanks in advance. P.S Please explain as simple as you can

In several textbooks I've read that treat classical thermodynamics, there is a theorem due to Carnot that is commonly stated: "No engine operating between two given temperatures is more efficient than a Carnot engine" (incidentally, this is the statement in Huang's book) In these same...

I've never taken physics, and I'm not even sure this is physics. :S On the hint it mentions, think of freshmen physics, but I honestly have no clue. Could someone help me out on how to even start this problem? Estimate the weight savings if a typical automobile engine (100 kg) is made of...

Homework Statement A rocket is launched at an angle of 53 above the horizontal with an initial speed of 100 m/s. It moves along its initial line of motion with an acceleration of 30 m/s^2 for 3 s. A this time its engines fail and the rocket proceeds to move as a free body. a. Find maximum...

I wanted to get some opinions on this, I am serious considering designing a ramjet rocket hybrid engine for my 3rd year mechanical engineering degree project and have started doing the research to see exactly how much work it entails I still can't quite decide... is this a realistic project? (my...

From a chemical point of view, what are some of your thoughts about powdered graphite in engine oil? I think it would work very well because it would suspend particles between the graphene sheets.

Homework Statement A 1600kg jet engine is fastened to the fuselage of a passenger jet by just three bolts (this is the usual practice). Assume that each bolt supports one-third of the load. (b) During flight, the plane encounters turbulence, which suddenly imparts an upward vertical...

I posted this on another section, but got no replies in three days...so thought maybe I'd had posted in the wrong section...apologies. I have an idea pertaining to energy storage in flywheels, something like they do in the KERS, and need assistance here... Ok, my idea involves using a...

Homework Statement A Carnot engine performs work at the rate of 360 kW while using 720 kcal of heat per second.If the temperature of the heat source is 650 C, at what temperature is the waste heat exhausted? Homework Equations because Th,Qh,and W are given so i going to use this formula...

Homework Statement During the working cycle of an engine, the heat transferred out of the system was 200kj/kg of working fluid. The internal energy also decreased by 300kj/kg of working fluid. find teh work done and state whether it is work done on the engine or by the engine. Homework...

Hi Guys I m trying to make a Stirling engine power by solar heat. Somewhere I found out that the solar flux available on Earth is abt 1350watts/m2 Is this heat energy only or "heat & light " combined?? I m trying to find out if my soar engine will be better than traditional solar...

what is an implosion engine?