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Title: Venturi Meters, Wet Gas Flow, and the ISO TR 11583 XLM f(PLR) Correlation
Author: Richard Steven
Source: 2021 North Sea Flow Measurement Workshop
Year Published: 2021
Abstract: A seminal paper by de Leeuw 1 in 1997 showed that a standard horizontally installed Venturi meter with a downstream pressure tap and read permanent pressure loss, PPL, could be developed into a rudimentary wet gas flow meter (see Fig. 1). De Leeuw presented a wet gas Venturi meter correlation that predicted the liquid induced gas flow prediction bias, i.e. over-reading (OR), for a known liquid loading, e.g. Lockhart Martinelli parameter (XLM). This correlation was specifically for a horizontal 4, 0.4 Venturi meter with gas and liquid hydrocarbon, OR f(XLM). The concept of a XLM f(PLR) relationship, i.e. where the Lockhart Martinelli parameter could be predicted via the ratio of the PPL and primary DPs (i.e. the Pressure Loss Ratio, PLR), was also introduced, but no correlation was given.

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