156B Week 3

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

• • Prototype nozzles have been machined and are ready for testing

  • Testing is planned for 4/19 at 1 PM

  • Results from test will help shape final design

Accomplishments from Previous Week

• • Redesigned Nozzle for machining

  • Machined prototype nozzles at CRMS

  • Detailed CFD analysis on newly designed nozzles

  • Purchased PEEK reinforced with carbon fiber

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

• • Test prototype nozzles on scope (Dylan, Haonan, Edwin)

  • Create CAD of potential final design inspired by results from testing in Solidworks (Kuanren)

  • Continue to brainstorm innovational designs (e.g. incorporating multiple nozzles) (Everyone)

  • Finish the assigned part of report (everyone)

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

• • Steve Peltier (4/12 via email)

    • Effects from tilting nozzle at different angles

      • Used CFD to determine 30 degrees is better than 15 degrees

    • Effects of different sizes of opening slot for nozzle

      • Will be exploring various exit cross-sections in test

  • Tristan (4/17 in person)

    • Prepare for nozzle testing on Thursday 4/19 at 1 pm

    • Test will provide insight to environment of operation and give measurements of pressure and velocity to fine tune designs

    • Involve researchers that work with microscope to get better understanding of physics behind charge dissipation

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

• • Contact Tom or Ian to see how to machine PEEK nozzle (4/11 in person)

    • We will be meeting with Tom Wednesday morning

  • Try to do prototype in a larger scale so that it is easier to be fabricated and tested (4/11 in person)

    • Working on prototype that combines nozzle and anchor together

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

• • Try to make prototype from material which is more easy to be machined or 3D printed (4/11 in person)

Risks and Areas of Concern

• • The biggest risk is that our design doesn’t improve much compared with previous nozzle due to the tiny scale

Resources or Information Required but not Available

• • Exact flow rate and pressure in the inlet of gas delivery

  • How the gas interact with the surface,; does it need to collect on the surface or can it just bounce off?

Schedule

• • Wednesday:

    • Meet with Tom

    • Meet with Jerry

  • Thursday:

    • Conduct gas distribution experiment

  • Friday - Tuesday:

    • Finish gas experiment and use results to guide design

Budget (list amount spent and amount remaining)

• • PEEK, $200

  • Machining at CRMS, ~$400 (waiting for exact quote from Bob)

  • $4400 remaining

Progress on Report and Webpage

• • Wrote first few sections of report as listed on class webpage