Fairing element for surrounding an obstacle in a fluid flow

A method for manufacturing a fairing element intended for placement in a passage for flow of a fluid, and intended to surround an obstacle which crosses the passage so that the fairing element guides the flow of the fluid on two opposite sides of the obstacle, the method comprising the following steps:

• collecting nominal values of several parameters of the flow, including at least a density 4 the fluid, respective variations in cross-sectional area and in mean radius of the passage along the flow, a direction of flow in the passage, a flow velocity value, and an angle of incidence of the flow relative to the obstacle upstream of said obstacle;
• determining a suction surface and a pressure surface of the fairing element, with a leading edge which forms a joining edge between the suction and pressure surfaces, and which is intended to be located upstream of the obstacle relative to the flow;
• and
• manufacturing the fairing element in accordance with the determined suction and pressure surfaces,
• wherein a shape of the suction surface is determined to produce, within a portion of the fluid which flows along said suction surface in accordance with the collected nominal values , pressure variations which are less than 5% in absolute values, of the fluid pressure value in the flow which exists at the leading edge, when said pressure variations are determined between any two points of said suction surface which are located between the leading edge and a zone of the fairing element called the transition zone, where, along the transition zone, a local thickness of said fairing element between the suction and pressure surfaces varies between 50% and 100% of a maximum thickness of the obstacle, said thicknesses being measured transversely to the flow.