User Account

All Pages

Thermodynamics, Mechanical Engineering

Assignment Help:
Problem specification
5 kg of air is contained in a piston-cylinder device, initially at a pressure of 2MPa and a specific volume of 0.08m3/kg. The air then expands, as an ideal gas, through a polytropic process, with variable values of n, to a final specific volume of 0.30m3/kg.
Objective:
Write a MATLAB code to solve for the pressure and temperature variation throughout the expansion process and to calculate the work and heat produced in the processes for variable values of n.
Procedure:
1. Begin by defining the temperature at the initial state and then define the temperature and pressure at the final state. Sketch a rough graph of what the process looks like on P-v coordinates. Write out by hand the equations and steps you would take to determine the actual P, T, and v at all points along the process. Identify unknowns, equations, constants, and calculation orders.
2. Using your hand calculations as a guide, write a simple MATLAB m-file to calculate the properties at points along the process (minimum of 20 points, but should be a variable that can be changed) using one of the values of n (I recommend using n=1.5). Plot P-v and T-v diagrams for the process using MATLAB.
3. Calculate the work performed for the process by integrating the curve of pressure versus specific volume. Use the “trapezoidal area method” for calculating the integral.
4. Assume that the specific internal energy for the air in this problem can be defined as a function of temperature as follows:
??(??)=(1.0344*10-4)*??2+(6.4476*10-1)*??+(1.3727*102)
Add code to your MATLAB program to calculate the specific internal energy for the process using the information of the pressure and specific volume at each state.
5. Using conservation of energy and the work calculated, determine the amount of heat transferred for each process.
6. Write a loop in the code to analyze the different values of n, or run the code for the different values of n asked for below.
Deliverables
1. Hand calculations that outline planned MATLAB code.
2. MATLAB code (m-file) that calculates the state variables P, v, T, and u for the defined process, and that calculates the work and heat for each process.
3. On the same graph, plot of P-v for this process with 4 different values of n: 1, 1.4, 1.5, 1.8.
4. Plot of P-v and T-v for n=1.5 on a single graph. Use the function plotyy.
5. Table summarizing results of work and heat as a function of n.
6. A brief paragraph detailing what you learned in this exercise and how useful you think these skills will be for your future as an engineer. This is not a BS question, I want you to provide me with useful information about your experience. If you didn’t learn anything here because you already are a pro at MATLAB, say that!

Related Discussions:- Thermodynamics

Find out the centroid of the shaded area, Find out the centroid of the shad...

Find out the centroid of the shaded : Find out the centroid of the shaded area shown in Figure Solution Net area of shaded portion of Figure = The area of full

Calculate total deflection -two close-coiled helical springs, Calculate tot...

Calculate total deflection -two close-coiled helical springs: Two close-coiled helical springs are compressed among two parallel plates by a load of 1000 N. The springs contai

Projectles on an inclined plane, a misile is fired at speed v and an angle ...

a misile is fired at speed v and an angle m that is inclide at an angle r to the horizontal.calculate the range

Determine the number of cycles - crack propagation, Determine the number of...

Determine the number of cycles - crack propagation: The plate of above Example  contained a crack of 50 mm length in the centre before it was subjected to cyclic stress. Deter

If no leak found in the above listed area remove flywheel, If no leak found...

If no leak found in the above listed area remove flywheel: Remove fly wheel and check weather oil leak is from the seal or "o" ring.

Movement of wire at the signal box, Movement of wire at the signal box: ...

Movement of wire at the signal box: The wire working on railway signal is 5mm in diameter and 300m long. If movement at the signal end is to be 25cm, make calculations for mo

Define thermodynamics, Define Thermodynamics Thermodynamics is the scie...

Define Thermodynamics Thermodynamics is the science which deals with the conversion of heat into mechanical energy. It is relies upon observations of general experience, which

Angular shear stress.., how is angular shear stress distributed in between ...

how is angular shear stress distributed in between two stanchions

Cantilever beam - shear force diagrams, Cantilever beam - shear force diagr...

Cantilever beam - shear force diagrams: Illustrate the shear force & bending moment diagrams for the cantilever beam illustrated in Figure. Figure Solution

Basic formula for maximum bending moment, Q.  W rite down the basic form...

Q.  W rite down the basic formula for maximum bending moment in some ideal cases. Sol.:   Ber m together with nature of load Maximu

Write Your Message!

Captcha
Order Assignment

Featured Services

Order Now

Popular Subjects

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

Submit Assignment

Academics

Major Subjects

Majors

Get In Touch

whatsapp: +91-977-207-8620

Phone: +91-977-207-8620

Email: [email protected]

TERMS & POLICIES

HELP & SUPPORT

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd