| 摘要 |
<p>An apparatus for measuring parameters in a moving fluid, said apparatus comprising a hollow body (2, 6, 11) with an inner measuring chamber (12) through which the fluid moves, and a measuring cell (3) disposed in said body and having an active surface (4). To reduce the volume of the measuring chamber (12) and to obtain therein a fluid flow distribution ensuring accurate measuring results, the apparatus (1) is provided with a flow distributing means (8) having a through passage (15) into which the fluid moves via an inlet (9). In the measuring chamber (12) which is defined by the surface (4), the upper end surface (13) of the means (8), and a sealing ring (14) arranged therebetween, the fluid flow is, via the upper outlet of the passage (15), first directed axially against the active surface (4) and is then radially and uniformly distributed along said surface. Subsequently, the fluid flows in the opposite direction into an annular gap (20) and, finally, out of the apparatus (1),via an outlet (23, 10). Thus, the outlet of the passage (15) in the flow distributing means (8) forms the inlet of the measuring member (12), whereas the annular gap (20) of the means (8) constitutes the outlet of the measuring chamber (12). The fluid thus moves in a closed system, and a radial flow is obtained in the measuring chamber.</p> |
