156B Week 8

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

• • Wind Tunnel Design Redesigned and built to achieve more consistent laminar flow

  • Preliminary Testing Done and Flaws/errors resolved

  • Wind Tunnel Velocity Measurements confirm uniform flow

  • Testing/Insulation Model designed (Waiting on arrival of Insulator 5/25)

  • Thermal Pad arriving 5/25

  • Thermocouples functional

  • Decided on staying with 30.5 cm x 30.5 cm (12"x12") panels. 

  • Panel #1 ready for full testing once all items have arrived

Accomplishments from Previous Week

• • Wind Tunnel Redesigned and built

  • Preliminary Testing Finished

    • Flaws and problems resolved (such as thermocouple placement, set up design of insulation, wind tunnel)

  • Velocity Measurements Taken of new wind tunnel to verify uniform flow.

  • Thermal Pad and insulation ordered.

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

• • Begin Testing and data acquisition - Team (Shifts of Two team members at a time since only two are needed to test)

  • Begin ANISYS modelling - James, Chris, David

  • Machine 5 more panels to size: 2 more from the 2.54 cm (1 inch) thick panels and 3 more from the 0.635 cm thick panels (.25 inch) - Team (Shifts of two since two team members are required to machine)

  • If possible, learn programming the CNC Drill so we do not have to wait for Tom - James

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

• • Alberto 5/18: When testing begins, Alberto and Jared will come to see our test set up

  • Alberto 5/18: Consider using IR camera

    • Although the utility of IR camera in determining uniform temperature is reasonable, the fact that there is no clear view of the panel during testing makes it impractical/unnecessary.

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

• • Jerry 5/17: Most thermal pads are able to withstand our necessary temperatures

    • Bought a thermal pad generally used for computers that is able to withstand our temperatures

  • Jerry 5/17: When modelling, consider neglecting the heat transfer from the air since it is several degrees of magnitude less than the honeycomb.

    • Since our model already contains air, we opted to keep it in since it would just be unnecessary to take it out.

  • Jerry 5/17: When modelling, consider using only the filet epoxy in contact with the honeycomb and neglect the epoxy in contact with air. Consider modelling the epoxy as another layer of thickness to the ends of honeycomb that has a different thermal conductivity.

    • New model created with these specifications in mind. Keeping our old models still since having a variety of models will make it easier to see which models are more accurate when empirical testing begins.

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

• • N/A

Risks and Areas of Concern

• • None as of yet just Time crunch for testing.

Resources or Information Required but not Available

• • None

Schedule

• • Experiments and Testing - 5/26

  • Arrival of Thermal Pad, Insulation and machining of insulation- 5/25

  • Machining more panels - 5/24

  • Learn ANISYS - 5/27

Budget (list amount spent and amount remaining)

• • Total Spent: $2421.94

  • Remaining: $2578.06

Progress on Report and Webpage

• • Draft 2 of Report Finished

  • Webpage Updated