PH—Postharvest Technology: Airflow induced by Falling Cottonseed Particles
✍ Scribed by S.I. Tabak; A.B. Biran; I. Tabak; G. Manor
- Publisher
- Elsevier Science
- Year
- 2002
- Tongue
- English
- Weight
- 272 KB
- Volume
- 81
- Category
- Article
- ISSN
- 1537-5110
No coin nor oath required. For personal study only.
✦ Synopsis
Bulk materials falling freely in a chute draw air with them. Experiments were carried out to study the parameters that in#uence the induced air#ow. The bulk material consisted of fuzzy and delinted cottonseeds and hulls. The experimental equipment included a loading, open hopper and an unloading enclosure connected to a chute. An ori"ce #owmeter was provided in the enclosure wall. The air drawn into the enclosure left it through the #owmeter ori"ce. The parameters varied during the experiments were the kind and the #ow rate of falling particles, and the length, cross-section and slope of the chute. The measured data showed that the air#ow rate grows with increasing chute length, cross-section or slope. The air#ow rate also increased with the fuzziness of the cottonseed and decreased as the particles' terminal velocity increased. Dimensional analysis was used to formulate an approximate form of the law governing the process. It was found that the terminal velocity of the falling particles characterizes well their aerodynamic properties.