Water outlet fitting, e.g. tap or shower head, producing a combined flow of gas and water, and power connector therefor

A method including:

• providing an apparatus, the apparatus including:
• a gas supply means,
• a water supply means, and
• an emitter body, the emitter body including at least one flow emitter;
• the flow emitter defining an emitter axis and including:
• a gas outlet, and
• a water outlet;
• the emitter axis extending centrally through the gas outlet;
• the water outlet being annular and surrounding the gas outlet, and having an outer diameter dw and a radial width h;
• supplying gas from the gas supply means, the gas having a density ρg, to flow at a velocity ug from the gas outlet;
• connecting the water supply means to a supply of water having a surface tension Ow to supply the water to flow at a velocity uw from the water outlet as an annular sheet of water surrounding the gas flowing from the gas outlet;
• wherein an aerodynamic Weber number is defined as
• W
• ⁢
• e
• g
• =
• (
• ρ
• g
• ·
• (
• u
• g
• -
• u
• w
• )
• 2
• ·
• h
• )
• /
• σ
• w
• and further including operating the apparatus within a parameter space defined by h/dw and Weg, wherein
• (
• h
• /
• d
• w
• )
• ≤
• 0.31
• and
• (
• 2.5
• ·
• 10
• -
• 3
• )
• <
• W
• ⁢
• e
• g
• ≤
• W
• ⁢
• e
• g
• ⁡
• (
• max
• )
• wherein Weg (max) is defined by a function
• (
• h
• /
• d
• w
• =
• 0
• .
• 0
• ⁢
• 4
• ·
• We
• g
• 0.5
• )
• to encapsulate the gas flowing from the gas outlet in a series of bubbles formed by the water flowing from the water outlet.