Investigation of the Constrains of the Flow Design for Pintle Injector
| Autor: | Sheng-WeiHuang, 黃聖瑋 |
|---|---|
| Rok vydání: | 2015 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 103 Pintle type injector has been widely used in space mission because it is easier to design and it leads to more stable combustion. The conventional pintle injector design creates mixing between radial flow and axial flow of propellants from orifices and on surface of a closed end tube, respectively. Single- or multi-row of orifices for the radial flows are common used in the design to make sure proper impingement between propellants. However, it is difficult to have complete impingement at high propellant flow rate ratio conditions that some of the axial flow propellant may bypass the radial jets. This research focuses on the design of a pintle injector with channels to restrict the axial flow and expect a more efficient mixing of propellants. PLIF technique is utilized in this study to observe the mass distribution and mixing ratio with different design parameters. The results show that appropriate channel width helps the liquid mass distributed more uniform and have more efficient mixing. In this study, the channel width is suggested to be 1.5 times of orifice diameter. As momentum flux ratio is increased, the mass distribution becomes more uniform as well as mixing ratio. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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