examII_s2008_soln

# examII_s2008_soln - Name MAE 4800 Exam II Open notes Open...

This preview shows pages 1–4. Sign up to view the full content.

Name:_____________________________ MAE 4800 Exam II May 14, 2008 Open notes Open book Closed neighbors Open mind Notes: Start exam when instructed – you will be given 120 minutes to complete the exam Write name at top of each page and any additional pages Read each problem carefully – if you still do not understand, ask Read the problem again – note what is being asked Clearly state all assumptions Clearly show all your work, commenting on what you are doing – keep in mind that your exam communicates to those who are grading what you know To maximize points, plug in numbers at the end – solve algebraically first Reference table you are using for properties Good luck! Potentially Useful Information: ρ [kg/m 3 ] 1.23 C p [kJ/kgK] 1.009 μ [kg/ms] 1.79E-05 ν [m 2 /s] 1.46E-05 k [W/mK] 3.00E-02 α [m 2 /s] 2.99E-05 Pr 7.00E-01 R [kJ/kgK] 2.89E-01 Air Properties Water Properties ρ [kg/m 3 ] 980 Cp [J/kgK] 4200 μ [Ns/m 2 ] 5.28E-04 ν [m 2 /s] 5.39E-07 k [W/mK] 0.66 α [m 2 /s] 1.6E-07 Pr 3.36 ρ [kg/m3] 8954 C [J/kgK] 383.1 k [W/mK] 386 α [m2/s] 1.12E-04 Copper Properties Ideal Gas Law: RT p ρ = Forced Convection Correlations Flow over a flat plate 33 . 0 5 . 0 L Pr Re 664 . 0 k hL Nu = = Re L < 5E5 Flow over a single circular cylinder ( 29 [ ] 5 4 8 5 D 25 . 0 66 . 0 33 . 0 5 . 0 D 000 , 282 Re 1 Pr 4 . 0 1 Pr Re 62 . 0 3 . 0 k hD Nu + + + = = 10 2 < Re D < 10 7 Flow over a sphere MAE 4800, Spring 2008 5/14/08

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

View Full Document
Name:_____________________________ 6 . 0 D Re 37 . 0 k hD Nu = = 17 < Re D < 70,000 MAE 4800, Spring 2008 5/14/08
Name:_____________________________ Problem 1 (50 points) Factorial Analysis Fun A pressure sensor vendor claims that he has a new sensor design based on strain gauges that is not sensitive to changes in the local ambient temperature or changes in the relative humidity (RH). Your boss does not believe these claims and has asked you to conduct a series of experiments to determine if the vendor claims are true or not. You decide to conduct a factorial study based on the design shown in the Table below. Test Case

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.

## This note was uploaded on 12/14/2009 for the course MAE 4800 taught by Professor Solbrekken during the Spring '09 term at Missouri (Mizzou).

### Page1 / 6

examII_s2008_soln - Name MAE 4800 Exam II Open notes Open...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online