Y2 V2 2 2 1 V1 = 0 V1 = 0 (a) (b) Figure 14.32 Measurement of fluid speed based on Bernoulli's principle. (a) A manometer is connected to two tubes that are close together and small enough not to disturb the flow. Tube 1 is open at the end facing the flow. A dead spot having zero speed is created there. Tube 2 has an opening on the side, so the fluid has a speed v across the opening; thus, pressure there drops. The , so h is proportional to pvý. (b) This type of velocity measuring device is a difference in pressure at the manometer is Prandtl tube, also known as a pitot tube.
Y2 V2 2 2 1 V1 = 0 V1 = 0 (a) (b) Figure 14.32 Measurement of fluid speed based on Bernoulli's principle. (a) A manometer is connected to two tubes that are close together and small enough not to disturb the flow. Tube 1 is open at the end facing the flow. A dead spot having zero speed is created there. Tube 2 has an opening on the side, so the fluid has a speed v across the opening; thus, pressure there drops. The , so h is proportional to pvý. (b) This type of velocity measuring device is a difference in pressure at the manometer is Prandtl tube, also known as a pitot tube.
University Physics Volume 1
18th Edition
ISBN:9781938168277
Author:William Moebs, Samuel J. Ling, Jeff Sanny
Publisher:William Moebs, Samuel J. Ling, Jeff Sanny
Chapter14: Fluid Mechanics
Section: Chapter Questions
Problem 84P: Suppose you have a wind speed gauge like the pitot tube shown in Figure 14.32. By what factor must...
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Suppose you have a wind speed gauge like the pitot tube shown in Figure 14.32. By what factor must wind speed increase to double the value of h in the manometer? Is this independent of the moving fluid and the fluid in the manometer?
Transcribed Image Text:Y2
V2
2
2
1
V1 = 0
V1 = 0
(a)
(b)
Figure 14.32 Measurement of fluid speed based on Bernoulli's principle. (a) A manometer is connected to two tubes that are
close together and small enough not to disturb the flow. Tube 1 is open at the end facing the flow. A dead spot having zero speed
is created there. Tube 2 has an opening on the side, so the fluid has a speed v across the opening; thus, pressure there drops. The
, so h is proportional to pvý. (b) This type of velocity measuring device is a
difference in pressure at the manometer is
Prandtl tube, also known as a pitot tube.
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