Pressure gauge issue
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This post was last edited by zhoudingshengs on 2023-12-4 08:42. Please actively participate in the discussion: 1. As shown in the figure below, 3 thin tubes are installed on the reducer, to which pressure gauges A, B, and C are attached respectively. (1) If fluid is flowing through the pipe, which pressure gauge indicates the highest value? Which pressure gauge indicates the lowest value? (2) What would be the readings of pressure gauges A, B, and C if the fluid is not flowing?
This seems to be from the instrument technician’s problem set~. The pipe section B has the smallest cross-section, so it shows the lowest value; A comes next, while C has the largest value； If the fluid in the pipe is at rest, with no kinetic energy and no pressure release, the readings of A, B, and C are equal
1. If a fluid is flowing through, the pressure at point A is the highest； 2. If there is no fluid flow, the pressures at points A, B, and C are equal.
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The C cross-section is larger than the A cross-section, so why is the pressure at C greater?
It doesn’t specify the flow direction of the fluid; actually, different flow directions result in different outcomes.
1. The specific diameter and flow direction are unknown, so it’s not possible to discuss the size in detail; moreover, it’s impossible to determine the relationship between the magnitude of pressure loss and potential energy. 2. The same size
This post was last edited by Agelxx on 2023-12-5 07:54. Large cross-section, slow flow rate, low kinetic energy, high potential energy. Kinetic energy is velocity, and potential energy is pressure.:lol
Pipelines have pressure loss; static pressure is different from dynamic pressure.