Gas-liquid two phase flow through a vertical 90deg elbow bend


Autoria(s): Spedding, P.L.; Benard, Emmanuel
Data(s)

01/07/2007

Resumo

Pressure drop data are reported for two phase air-water flow through a vertical to horizontal 90° elbow bend set in 0.026 m i.d. pipe. The pressure drop in the vertical inlet tangent showed some significant differences to that found for straight vertical pipe. This was caused by the elbow bend partially choking the inflow resulting in a build-up of pressure and liquid in the vertical inlet riser and differences in the structure of the flow regimes when compared to the straight vertical pipe. The horizontal outlet tangent by contrast gave data in general agreement with literature even to exhibiting a drag reduction region at low liquid rates and gas velocities between 1 and 2 m s -1. The elbow bend pressure drop was best correlated in terms of le/d determined using the actual pressure loss in the inlet vertical riser. The data showed a general increase with fluid rates that tapered off at high fluid rates and exhibited a negative pressure region at low rates. The latter was attributed to the flow being smoothly accommodated by the bend when it passed from slug flow in the riser to smooth stratified flow in the outlet tangent. A general correlation was presented for the elbow bend pressure drop in terms of total Reynolds numbers. A modified Lockhart-Martinelli model gave prediction of the data.

Formato

application/pdf

Identificador

http://pure.qub.ac.uk/portal/en/publications/gasliquid-two-phase-flow-through-a-vertical-90deg-elbow-bend(36ef3bbe-530d-4740-ba71-a2866a0a6dc5).html

http://dx.doi.org/10.1016/j.expthermflusci.2006.08.003

http://pure.qub.ac.uk/ws/files/388490/article.pdf

http://www.scopus.com/inward/record.url?scp=34247243213&partnerID=8YFLogxK

Idioma(s)

eng

Direitos

info:eu-repo/semantics/restrictedAccess

Fonte

Spedding , P L & Benard , E 2007 , ' Gas-liquid two phase flow through a vertical 90deg elbow bend ' Experimental Thermal and Fluid Science , vol 31 (7) , no. 7 , pp. 761-769 . DOI: 10.1016/j.expthermflusci.2006.08.003

Palavras-Chave #/dk/atira/pure/subjectarea/asjc/1500/1507 #Fluid Flow and Transfer Processes #/dk/atira/pure/subjectarea/asjc/2200/2210 #Mechanical Engineering
Tipo

article