| Autor: |
Changjin Yoon, Stephen Heister, Paul Sojka, Christopher Watson, Guoping Xia, Charles Merkle |
| Rok vydání: |
2011 |
| Předmět: |
|
| Zdroj: |
47th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit. |
| DOI: |
10.2514/6.2011-5707 |
| Popis: |
Computational and experimental efforts to investigate the injector flow characteristics for gel propellants are presented. Two different types of injectors are considered: a tapered tube and plain-orifice type. Paraffin/Thixatrol and Water/HPC Gels are used as working fluids and are modeled as a shear-thinning fluid. Flows are characterized by a time-averaged discharge coefficient, viscosity at the exit, and velocity and viscosity profiles at the exit for various injector geometries. Factors in a parametric study include convergence angle in a tapered tube injector, orifice length-to-diameter ratio, and chamfer length in a plain-orifice injector. According to a parametric study, hydraulic resistance increases by increasing the convergence angle in a tapered tube injector and orifice L/D ratio in a plain-orifice injector. It is found that the discharge coefficient and viscosity at the exit are reduced under these conditions. The effect of chamfer length on steady injector flows are negligible in a plainorifice injector. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
