Reverse Circulation Drilling Method Based on a Supersonic Nozzle for Dust Control
| Autor: | Qilei Yin, Ge Dong, Jingqing Cheng, Zhang Xinxin, Wu Dongyu, Kun Yin, Zhang Pengfei |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Entrainment (hydrodynamics)
Supersonic wind tunnel Engineering Suction 020209 energy Flow (psychology) Nozzle 02 engineering and technology Computational fluid dynamics lcsh:Technology lcsh:Chemistry Schlieren 0202 electrical engineering electronic engineering information engineering General Materials Science Supersonic speed Aerospace engineering lcsh:QH301-705.5 Instrumentation entrainment ratio Fluid Flow and Transfer Processes dust control lcsh:T business.industry Process Chemistry and Technology General Engineering Mechanics shock strain lcsh:QC1-999 Computer Science Applications reverse circulation lcsh:Biology (General) lcsh:QD1-999 lcsh:TA1-2040 supersonic nozzle lcsh:Engineering (General). Civil engineering (General) business lcsh:Physics |
| Zdroj: | Applied Sciences, Vol 7, Iss 1, p 5 (2016) Applied Sciences; Volume 7; Issue 1; Pages: 5 |
| ISSN: | 2076-3417 |
| DOI: | 10.3390/app7010005 |
| Popis: | To reduce dust generated from drilling processes, a reverse circulation drilling method based on a supersonic nozzle is proposed. The suction performance is evaluated by the entrainment ratio. A series of preliminary laboratory experiments based on orthogonal experimental design were conducted to test the suction performance and reveal the main factors. Computational fluid dynamics (CFD) were conducted to thoroughly understand the interaction mechanism of the flows. The Schlieren technique was further carried out to reveal the flow characteristic of the nozzle. The results show that the supersonic nozzle can significantly improve the reverse circulation effect. A high entrainment ratio up to 0.76 was achieved, which implied strong suction performance. The CFD results agreed well with experimental data with a maximum difference of 17%. This work presents the great potential for supersonic nozzles and reverse circulation in dust control, which is significant to protect the envrionment and people’s health. |
| Databáze: | OpenAIRE |
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