Generating Pressure Fluctuations In A Line

摘要

For generating pressure fluctuations (Δρ) in a fluid (8), the fluid is fed at a constant rate into the inlet (4) of the line (2), the line (2) is flowed through by the fluid (8) and the volume flow of the fluid (8) is throttled to varying degrees at the outlet (6) dynamically over time, in particular periodically, in order by the varying of the throttling to produce pressure fluctuations (Δρ) in the fluid (8) upstream in the line (2) dynamically over time. On a pressure modulator (24), an outlet opening (26) can be connected to a line (2), wherein the outlet opening (26) opens out into a clearance (28), and so during operation the fluid (8) leaves the outlet opening (26) as a fluid jet (30) along a fluid path (32) and enters the clearance (28). An impact body (34), which can be introduced into the fluid path (32) in a manner varying dynamically over time, at least temporarily forms an impact surface (36, 36a-c), which is impinged by at least part of the fluid jet (30) during operation.

主权项

1. A method for generating pressure fluctuations (Δp) in a fluid (8) in a line (2), which is part of a line system (12) of a test layout (17) for a medical stent (18) with a test section (20) which can be expanded by an increasing of the pressure (p) of the fluid (8), in which the stent (18) is placed or can be placed, the method comprising the following steps:
the line (2) is flowed through by the fluid (8) from an inlet (4) to an outlet (6), at the inlet (4) the fluid (8) is delivered at a constant volume flow into the inlet (4) of the line (2), at the outlet (6) the volume flow of the fluid (8) flowing from the outlet (6) is throttled to varying degrees, dynamically over time, especially periodically,wherein, because of the change in the throttling, dynamic pressure fluctuations (Δp) over time are generated in the fluid (8) upstream in the line (2).