Engine Definition and 999 Threads

I'm designing a stirling engine for a high school engineering project. I need to know more information about them though before I start machining out the parts. I looked at Wikipedia and a few other sites, but I need something a little more in depth. I'm looking for a good stirling engine book...

I am making a CNC machined stirling engine for high school my engineering class. Before I can get started I need people to fill out this survey to help me decide which design to go with. Thanks! Stirling Info http://en.wikipedia.org/wiki/Stirling_engine...

I'm brand new to this forum, although I've been browsing the threads for a while now. I'm currently majoring in mechanical engineering at the University of South Florida. I'm in my third semester, and I have been assigned this problem and I am struggling very much with it. (I haven't taken...

Hello, I am searching for plans or copies of the blueprints for the Rocketdyne H-1 engine used in the Saturn I/IB rocket, any help would be appreciated.

Good Morning, I am working on a project that is designing a water pump for a car engine without any mechanical parts (works on waste heat building pressure to circulate the water). I know that most of the car engine heads are aluminum and that blocks are part cast steel and part aluminum. In...

In engine, there is valve and the valve spring. If you have ever look at the valve spring before, then you will notice that one end has its coil closer together than the other end. So a valve spring is a kind of progressive spring. In almost all engine repair manual I read, the instruction is...

Question is attached I have spent a great deal of time on this problem and I am hoping someone can help me out. My attempt at problem. first for the heat engine QL/Qw1 = TL/Twaste so efficiency = 1- Tl/Twaste efficiency = 0.93808 and I know that efficiency = Wout/ Qw1 This is as...

I have a car engine specs and I wanted to estimate the torque at each speed and plot the torque curve. I have calculated the road load or the running resistance force for all gears at different RPM's and found the speed (m/s) for each RPM. How to estimate the torque of the engine in order...

Hi, Please can anyone explian what is cyclic symmetry? I'm new to this term and have encountered this in jet engine example Vishal

Homework Statement I'm trying to find an expression for the efficiency of a stirling engine operating with an ideal diatomic gas, and cycling through a volume V and a multiple of its compression ratio, r, Vr. Homework Equations processes: 1-2 isothermal expansion 2-3 isochoric...

Hey all, So I'm trying to figure out a design for an engine that will fit in a rectangle space, longer horizontally than vertically, so I thought of a water pump. A water pump is a blade that channels one stream of water into another channel. Picture: So then I thought why can't I do the...

Hi, I have decided to increase inlet T and P of a typical diesel engine (operatiing on dual air standard cycle). THeoretically if all other parameters r same, I have observed that t2 (temp at the end of compression) and p2 increases, but t3 (temp at the end of constant volume heating) and...

Homework Statement In order for a car of 4000kg to travel at 10m/s with a frictional force of 400N, find the power output of the engine. Homework Equations P=Fv The Attempt at a Solution I found 40000*10+400*10=400400W, is this right?

Hi guys. I'm building a dynomometer for a 1hp engine. I plan to use something like an alternator or a dc generator to do the braking. I will mount the alternator or generator so it is free to rotate around the shaft and measure the force at a distance to get the torque. The idea is to vary the...

For example, what is the difference between Otto cycle, Carnot cycle, Diesel cycle other than that they have different compression/power strokes and ignition/exhaustion strokes?

Homework Statement Consider a Carnot engine that operates between a hot reservoir at 63°C and a cold reservoir at -14°C. In running 25 minutes, this engine absorbs 590 J of heat from the hot reservoir. How much heat does it expel to the cold reservoir? Homework Equations Q_H/Q_C =...

Here is their http://en.wikipedia.org/wiki/ResearchGate" , note the section I highlighted below: It appears this http://www.researchgate.net/" is young (2010) has roots in Berlin, Germany and Cambridge, Massachusetts. Is anyone here using it ? If so is the search engine everything they claim...

Hi, I'm trying to simulate the ship traveling in ice. Basically, I would like to assume that the rigid body dynamics is sufficient to do the job since the main point here is the interactions between rigid ice fragments and the rigid ship. The fluid interactions with ice fragments should be...

why convergent rather than divergent? is this to maintain the constant air velocity. Can someone explain this better to me. Would be helpfull

Homework Statement Why do you need to start this Stirling engine by hand? Homework Equations N/A The Attempt at a Solution there is not sufficient power at first to overcome the inertia, so external work in the form of pushing it by hand is needed. however once started the momentum of the...

Homework Statement In a steam engine the pressure and volume of steam satisfy the equation PV1.4=k, where k is a constant. Calculate the work done by the engine (in ft/lbs) during a cycle when the steam starts at a pressure of 100 lb/in2 and a volume of 400in3 and expands to a volume of...

Hi I have been trying to figure out the force experienced by individual components of a gas turbine engine. Generally, the thrust of the engine is defined / calculated as the change in the momentum of the fluid. Usual formula is mass flow X (C_jet - C_intake) + the pressure difference in...

Homework Statement The problem is in the attached document Homework Equations attached in pdf document The Attempt at a Solution 1->2 adiabatic compression T2=(V2/V1)^1-(Cp/Cv) = 987.7K w1=nCvdT = (1mol)((3/2)*8.314J/molK)(987.7K-298K) = 8601.3 J 2->3 w2=-PdV=-Pmax(V3-V2)...

Water Piston Engine...! what do you know about water piston engine ! is there any online documents you provide me with , because I couldn't find anything online! I know it uses no cylinders and the thrust is generated by the water somehow! I wish I can find something to read about the...

Homework Statement A diesel engine requires no spark plug. The air in a cylinder is compressed so highly that the fuel spontaneously ignites when sprayed into cylinder. If the air is initially at 20°C and is then compressed by a factor of 15 in volume, what final temperature is attained...

This project is a basic 6 inch rotary piston engine. The rotary engine project is to build a external combustion chamber that will redirect the expanding heat into a rotor housing and turn a rotor with a single piston vane 340 degrees to the exhaust port. The basic piston,rod and crank...

Can anyone tell me if engine cylinder weight lowers, does it make change in fuel consumption or the power of engine?

hi, I'm designing a clutch and need to calculate the force transmitted by the clutch. engine power is 30hp and rpm is 3000. How to calculate.

In order to test the performance of a specific engine, is it necessary to find a design point? If so could anyone tell me how to find the design point for gas turbine engine and suggest any useful materials that gives good information about Design point performance. Thank you!

I recently bought one of those model steam engines, which came with a box of fuel tablets which I can't figure out how to light. I've put them over my cigarette lighter until they snap, crackle, and pop but they just won't catch and my engine won't go. How do you light these things? The box...

Homework Statement A small space probe of mass 235 kg is traveling at 85.0 m/s. It fires its main engine at an angle of 63.00 to its original direction of travel. The engine produces a thrust of 12,000 N and there is enough fuel on board for a 10.0 s burn. What distance will it have traveled...

what role dos the reversibility play in making the carnot cycle most efficient?

hi Im currently studying aeronautical engineering at college and needed some ideas for projects and whether they would be pliable or not My current idea: A replica of hero's engine to show the basic principles of jet propulsion but to spice the idea up a little bit, i was thinking about...

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...

Hello to you all, Does anyone know if gas engines running on a cogeneration (combined heat & power) mode can achieve electrical efficiency rates as high as 40% as it is...

Can anyone here explain to me the concept of an Alfvén engine? I heard about it sometime ago in a science fiction book and I have found little on the internet regarding it except enough for me to know it has something to do with interstellar magnetic fields (hence why I am posting here...

Hi, Can someone please solve this question for me, including step by step instructions ? I can solve the ones where the mass of a car is given, but can't do this one. Homework Statement Setting off from rest the car accelerates uniformly and climbs a steep hill which has a gradient of 1...

Hi, I am working on a school design team where we are building a small scale formula car. I am a member of the engine group, and am tasked with CALCULATING the minimum spark energy required to start combustion in our engine. I know there is an official term for this, (required spark energy?)...

Homework Statement A 1500kW heat engine operates at 25% efficiency. The heat energy expelled at the low temperature is absorbed by a stream of water that enters the cooling coils at 20 degrees C. If 60L flows across the coils per second, determine the increase in temperature of the water...

Hello friends, I just wanted to know what makes the engine turns faster when you open the valve throttle.

The power output of an automobile engine is directly proportional to the mass of air that can be forced into the volume of the engine's cylinders to react chemically with gasoline. Many cars have a turbocharger which compresses the air before it enters the engine, giving a greater mass of air...

The Govt. Surplus GenSet engine A084 is a four cylinder, four stroke, 1390cc/84cu.in. aircooled flat four with a 3 in. bore and a 3 in. stroke. It was made by the thousands by Hercules and resembles a Lycoming shrunk in the dryer. It has been converted to experimental aircraft use and faily...

If human can build the starship but how there having a drive engine system that have a more reliable and infinite source of fuel?

Homework Statement Several velocities, time, and length scales are useful in understanding what goes on inside engines. Make estimates of the following quantities for a 1.6-liter displacement four-cylinder spark-ignition engine, operating at wide-open throttle at 2500 rev/min. a. The mean...

hello fellow engineers! i just started work at a marine company and was assigned to investigate on this formula. it is from ISO 8861 and used to caculate the airflow needed for heat evacuation in a engine room. this is the formula, airflow needed = (heat emitted from engine and all other...

Hi, I have had an idea floating around regarding stirling engines, and was hoping that somone may be able to provide some information. Supposing a stirling engine is run mechanically, one side heats up, the other cools down. what would happen if the cool side was heated externally...

A friend and I are working on this idea which is fairly common, but I'm having trouble starting out. The idea is that of a compressed air engine. Where we take a normal, small capacity engine and modify it such that only compressed air, stored in tanks is sufficient to move the piston. Now...

Hello, I'm in the process of building a small liquid rocket engine that uses glow fuel as propellant. Can anyone direct me to a company that sells small liquid rocket engines? Thank you.

This is a simple question I have because I am looking at a particular engine cycle, and I can't seem to think of its name...thus it is very difficult to search for discussions of something you don't know the name of. I'll describe the cycle, if anyone knows the name of the cycle please let me...

I found this engine amoung the many on the web from inventors out there. Essentially this person adapted a can combustor onto an inline cylinder engine with turbos. Below I pasted the description from the site. What are your thoughts on this one...