156B Week 6

Overview of Status of Analysis, Design, Fabrication, Tests, etc.

• • Wind Tunnel Completed (Except flow straighteners)

  • Honeycomb panels arrived 5/9

  • Amplifier (For removing thermocouple noise) arrived 5/8

  • Hot wire anemometer for measuring wind/testing turbulent flow available for rent and use 5/10.

  • Heating Pad calibrated and ready for use and wired to a nema 5 15 plug (Necessary to plug into temperature controller)

Accomplishments from Previous Week

• • Wind Tunnel Completed

  • Mathematical modeling of wind tunnel verified with professors

  • Draft 1 Report Finished

  • Verified and fixed honeycomb parameter values (Thermal conductivity of epoxy is actually 0.2 W/mK)

Goals for Next Week (list names after each item). Use specific and measurable objectives.

• • Fabricate honeycomb panels to size 5/10/17 -James, Chris

  • Build and incorporate flow straighteners -James, David

  • Attach thermocouples to honeycomb panels -Alex

  • Begin preliminary testing 5/10/17 - Team

  • Fix any flaws or errors in the testing procedure that come up during testing -Team

  • Decide how to incorporate cold temperature load testing method -Team

  • Theorize causes of error between actual data and simulation data. -Team

Sponsor Comments from Last Meeting and Actions Taken to Address these Comments (indicate date of comments and if via email or in person)

• • 5/4: Consider using anemometer for measuring and testing the wind tunnel for its velocity and whether or not it is turbulent or laminar.

    • Decided to use anemometer

  • 5/4: Verify the calculation for the heat transfer coefficient for the wind tunnel.

    • Verified and fixed with Professor Nomura

Instructor Comments from Last Meeting and Actions Taken to Address these Comments  (indicate date of comments and if via email or in person)

• • 5/3: Verify values for honeycomb parameters, especially the thermal conductivity of epoxy

    • Verified with manufacturer 0.2 W/mK

  • 5/3: Consider using flow straightener already available. Talk with Steven.

    • No flow straighteners are available. We are back to using straws.

  • 5/3: Simulation values for thermal conductivity seem to high.

    • Modified simulation parameters and adjusted for new honeycomb parameters (the new thermal conductivity of the epoxy)

Comments from Other Students in the Class (indicate date of comments and if via email or in person)

• • 5/3: Dry ice in wind tunnel may not provide sufficient cold air to cause a significant decrease in temperature

    • If true, it is fine. The wind tunnel is mainly for forced convection and not temperature. It was just to add more extremity in the temperature gradient.

Risks and Areas of Concern

• • None

Resources or Information Required but not Available

• • None

Schedule

• • Fabricate honeycomb panels to size 5/10/17

  • Attach thermocouples to honeycomb panels 5/10/17

  • Begin preliminary testing 5/10/17

  • Buy Straws and incorporate into wind tunnel 5/10/17

  • Measure Wind Tunnel with anemometer 5/10/17

  • Hypothesize causes of error between simulation and actual data 5/11/17

Budget (list amount spent and amount remaining)

• • Spent: $1759.70

  • Remaining: $3240.30

Progress on Report and Webpage

• • Draft 1 Report Finished and uploaded