STATIC PRESSURE TUBE APPARATUS, METHOD, AND SYSTEM
First Claim
1. A static pressure measurement apparatus, the apparatus comprising:
- a housing defining a passage for the flow of gases;
a static pressure tube having an opening, the static pressure tube being attached to a side of the housing at a connection point and extending into the passage such that the opening is disposed within the flow of gases;
wherein the flow of gases around the static pressure tube raises the temperature of the tube.
2 Assignments
0 Petitions
Accused Products
Abstract
An apparatus, system, and method for measuring static pressure in a warm gas flow while minimizing particulate deposit formation includes a housing containing the flow of gas, a pressure sensor, and a heated pressure sampling tube attached to the sensor, with the tube sampling the gas flow. The heated sampling tube reduces the temperature gradient between the gas and the tube, reducing thermophoretic forces that contribute to deposit formation. The sampling tube extends through the housing into the gas flow in one embodiment, enabling the gas to heat the tube and locating the open end of the tube in a higher-flow area of the gas, further reducing deposit formation.
19 Citations
25 Claims
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1. A static pressure measurement apparatus, the apparatus comprising:
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a housing defining a passage for the flow of gases; a static pressure tube having an opening, the static pressure tube being attached to a side of the housing at a connection point and extending into the passage such that the opening is disposed within the flow of gases; wherein the flow of gases around the static pressure tube raises the temperature of the tube. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A static pressure measurement apparatus, the apparatus comprising:
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a passage configured to accommodate the flow of a gas; a static pressure sampling device disposed on the passage, the sampling device operatively attached to a static pressure sensor configured to measure the static pressure of the gas; a thermal mechanism configured to heat the static pressure tube. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A method of measuring the static pressure of a gas flow, the method comprising:
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urging the gas through a housing passage, the housing passage having an exterior wall; sampling the gas at a sampling point located within the interior of the housing passage and a significant distance away from the exterior wall. - View Dependent Claims (15, 16, 17)
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18. An exhaust gas static pressure measurement system, the system comprising:
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an exhaust gas housing configured to accommodate the flow of exhaust gases; an elongate static pressure measurement tube disposed through a side of the housing at a connection point, the measurement tube having first and second ends, the measurement tube extending into the interior of the housing such that the first end is disposed in the interior of the housing; an opening disposed on the first end of the measurement tube, the opening configured to sample the exhaust gases, and a significant portion of the measurement tube being disposed between the opening and the housing; a static pressure sensor operatively connected to the second end of the measurement tube, the sensor configured to sense the static pressure of the gases. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25)
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Specification