Abstract
It is a key and difficult problem to find the optimal powder-feeding technique in the study of powdered engines. In this paper, the feeding of powder in powder engines at different gas-solid ratios was experimentally investigated. Working characteristics of the classic piston-driven powder feeding system were obtained. A high linear tendency between powder mass flow rate and the minimum throttle channel area is observed from the experiment. The solid-gas mass ratio to maintain a stable powder feeding is approximately valued in range of 34.4–54.6 under different throttle channel areas. The least deviation in the relative powder mass flow rate for the tests is −15% to +8%. Due to the high uncertainty of the gas-solid flow structures at different gas-solid ratios, obvious low-frequency oscillations and high-frequency oscillations exist during the powder feeding process. The frequencies of low-frequency oscillations are mainly 1–3 Hz, while those of high-frequency oscillations are 20–30 Hz and 30–45 Hz in different tests.
| Original language | English |
|---|---|
| Pages (from-to) | 712-721 |
| Number of pages | 10 |
| Journal | Acta Astronautica |
| Volume | 189 |
| DOIs | |
| State | Published - Dec 2021 |
Keywords
- Gas-solid ratio
- Mass flow rate
- Powder feeding
- Powdered engine
- Solid-gas two-phase flow
Fingerprint
Dive into the research topics of 'Powder feeding in a powder engine under different gas-solid ratios'. Together they form a unique fingerprint.Cite this
- APA
- Author
- BIBTEX
- Harvard
- Standard
- RIS
- Vancouver