Lec32

Lec32 - c v and c p Under isentropic assumption from Eq...

This preview shows pages 1–7. Sign up to view the full content.

ME 200: Thermodynamics I Lecture 32: Isentropic processes Sections 6.11 Problems: SP32; 6.125, 6.129 Professor Hukam Mongia Office Hours: MWF 2:30 to 3:30 pm in ME 83 (Other times email for appointment) Email: [email protected] Phone: 765-494-5640 Course Website: https://engineering.purdue.edu/ME200 Course Secretaries: Diana Akers (ME 84) and Marilyn Morrison (ME 100) See Kul Inn (ME 189) about grading Homework Assignments 1

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Isentropic Processes Most ideal the best an equipment can be expected to perform. Calculating properties becomes relatively straightforward. Especially if we combine it with the ideal gas law 2
3 Recall Equations 6.20a, 6.21 and 6.22: With constant

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: c v and c p : Under isentropic assumption, from Eq. 6.20a, we can calculate s o ( T 2 ) : 4 Utilize the ideal gas law in addition to s 1 = s 2 , to derive relationship for v 2 / v 1 for air going through an isentropic process: 5 Ideal gas going through isentropic process with constant c v and c p : Then from Equations 6.22b and 6.21 b one gets, respectively: 6 Polytropic Process: P v n = constant Constant Pressure Heat addition at constant volume Diesel engines Constant pressure heat addition Gas turbines 7 Example 6.9 Use A-22E: pr2 = 21.18, pr1 = 1.3860 p2 = 15.281 atm From Table A-20 E K at 850 o R (390 o F) is 1.39 p2 = 15.26 atm....
View Full Document

{[ snackBarMessage ]}

What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern