Booster Nozzle Cross-Section Booster Nozzle Exploded View
Overview
The Booster Nozzle Assembly is intended to be used on Pheonix 1, attached to the booster stage of the rocket. It is made up of four components: the nozzle carrier, phenolic insert, graphite insert, and phenolic cap. After manufacturing these parts will be sealed together using high-temp silicone RTV sealant. The entire assembly will then be bolted to the back end of the motor case using 24 1/4-20 Bolts. The nozzle is sealed to the case using two O-rings, one primary and one redundant, on the outside of the aluminum nozzle carrier. The purpose of these O-rings is to keep the hot gases from combustion inside the chamber and prevent exhaust leakage and therefore an inefficient and possibly dangerous burn. To select the right size O-ring gland size, we used the calculator at this link: https://www.applerubber.com/oring-gland-calculator/#medium-search-field.
Design:
Nozzle Basic Dimensions:
Throat Diameter: 1.085 in
Exit Diameter: 3 in
Throat Length: 0.1 in
Convergent Angle: 60 degrees
Divergent Angle: 15 Degrees
Parts:
| Part Name | Material | Purpose | Manufacturing Equipment |
|---|---|---|---|
| Graphite Insert | Graphite | The graphite has a high melting point, and is able to absorb most of the heat from combustion, and forms the throat of the nozzle. | Lathe |
| Phenolic Insert | PE Phenolic | Phenolic in the nozzle acts as a mediator for conductivity between the graphite and aluminum since graphite is extremely conductive. The phenolic insert also forms the first part of the divergent section. | Lathe |
| Phenolic Cap | PE Phenolic | Forms the convergence section of the nozzle. |