WT Aerospace Engineering

I am Samuel "Red" Otto. This blog documents my progress on projects in propulsion and CFD. In Research Science with Graig Marx, my focus is on the regression behavior of liquefying hybrid rocket fuels, determining the dependence of regression rate coefficients on the Thermal Properties of n-paraffin fuels. In ACSI with David Nassar, I am investigating core flows in a hybrid rocket motor using a MUSCL scheme in conjunction with the Advection Upstream Splitting Method (AUSM) for flux evaluation.

Saturday, January 21, 2012

Nitrous Injector Machining

Yesterday I completed the machine work one the forward closure and nitrous injector per the specs given in the motor schematic. Here are a few images of the forward closure with the injector installed. The injector itself contains a compression fitting for the thermoplastic tubing that prevents nitrous flow prior to ignition. A pressure tap (small hole on the right side of the injector face in the image below) was drilled through the closure and adapted to 1/16" NPT in order to measure motor internal pressures and the pressure drop across the injector.