Electric HP Equations

Video

This is a video of the strobe run of the turbine. Pressure did not exceed 25psi. We noticed issues with the strobes we had. The Strobotac was much different than a second newer design showing us that the strobes needed to be calibrated. On monday we plan on talking to a professor who should have a calibrated one.

Milling

Obtained a 25,000RPM strobe since our newer model was capped at 12,500RPM. Also started milling the air circle introduction slope.

Trimmed nozzle blanks

Today I cut the acrylic nozzle blanks from 1'x1'x1" sheet to make the outer dimensioned slope blanks. In addition the nipple holes were made and tapped as well as the mounting.

Calculations, RPM vs Torque

An excel graphing equation was created to determine the HP output from a given RPM, disk gap, and exhaust hole size.

FloWorks, Calcs

More FloWorks experimentation and calculations to determine nozzle degrees.

Meeting update

An earlier meeting with Roberts was held today to discuss the two additional nozzles. Friday's meeting was canceled.

Adapter

Created an adapter for the turbine to connect to a motor for torque measurement. Since the starting torque on the motor is a little to high for the turbine we will probably use a dead weight moment arm method in the future instead.

Test 2

Created new shaft with larger barrel dimension. Ran 2nd test and achieved approximatly 20% increase in RPM output due to smoothed disk OD.

Bearings, shaft install

The new bearings for the turbine were received today and installed as well as the +/-0.003" shaft. This should eliminate our friction forces from a small shaft spinning in our original bearings.