PRESSURE DROP EXPERIMENTAL ANALYSIS FOR HORIZONTAL TWO-PHASE SLUG FLOW IN CORRUGATED PIPELINES
Lucas Y. Kashiwakura1; Carlos E. R. S. C. Mendoza1; Carlos L. Bassani1; Henrique Stel1; Fernando C. Vicencio1; Rigoberto E. M. Morales1
1 NUEM/PPGEM/UTFPR
doi:10.20906/CPS/COB-2015-0824
Resumo
Slug flow is the most common flow pattern on oil and gas transportation for offshore applications. The pressure drop estimation for this flow pattern has been largely studied over the last decades due to its importance in facilities design. Most part of those studies considered the pipe roughness, but not its intern corrugated geometry, which is a project constraint due to the duct flexibility needs. This geometry affects the pressure drop due to the recirculation and drag induced by the discrete cavities on the wall, and then it shall be contemplated on the models. For these purposes, an experimental loop has been designed for pressure drop measurements of air-water slug flow on corrugated pipes for different groove geometries. The measurements were compared to the Lockhart-Martinelli methodology, which proposes a correction factor over the single-phase pressure drop prediction. The methodology showed accordance for corrugated pipes and the new constants of its regression are presented in this work. The pressure drop recalculation using this new regression lied into a ±15% error range.
Palavras-chave: multiphase flow; slug flow; corrugated pipes; pressure drop