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

Explain the side relief angle, Explain the Side Relief Angle It is angl...

Explain the Side Relief Angle It is angle made by flank of a tool and plane perpendicular to base just under the side cutting edge. if the side relief angle is very large the c

Product Design and Development, I need a work to be done in the field of te...

I need a work to be done in the field of technical function generation for a product development process and about 3000-3500 words on any theoretical topic related to product devel

Engfine, how we made parts of engine

how we made parts of engine

Disc type brake, Disc Type Brake:  As shown in Figure the disc brake ...

Disc Type Brake:  As shown in Figure the disc brake consists of a pearlitic grey cast iron disc bolted to the wheel hub and a stationary housing called caliper. Casting in tw

Swing arm shock absorber , Swing Arm Shock Absorber :   This type of suspe...

Swing Arm Shock Absorber :   This type of suspension is used to serve for rear part of motorcycle. The advantage of this type of suspension is that large deflections are absorbed.

Open and closed thermodynamic system, Steam flowing at a rate of 3200 lbm/h...

Steam flowing at a rate of 3200 lbm/hr enters an adiabatic nozzle. The initial condition of steam is: P1 = 250 psi, v1=620 ft/min, v1 = 2.4 ft3/lbm and u1 = 1125.5 Btu/lbm. The ste

Discover the maximum thickness required, Discover the maximum thickness req...

Discover the maximum thickness required: A thin cylindrical vessel of 2 m diameter and 4 m length having a particular gas at a pressure of 1.65 N/mm 2 . If the allowable tensi

The auto component sector-automobiles industry growth , The auto component ...

The auto component sector has also posted significant growth of 20 percent in 2003-04, and achieved a sales turnover of Rs. 30,640 crore (US$ 6.7 billion). Further, there is a pote

Calculate the vertical anchoring forces, A converging elbow (see Figure 4) ...

A converging elbow (see Figure 4) turns water through an angle of 135 o in a vertical plane. The flow cross-section diameter is 400 mm at the elbow inlet, section (1), and 200 mm

Write Your Message!

Captcha
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!

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