Arrangement of dams in air data probe

Patent metadata

Field	Value
Publication number	US-10578638-B2
Application number	US-201816158793-A
Country	US
Kind code	B2
Filing date	Oct 12, 2018
Priority date	Mar 13, 2017
Publication date	Mar 3, 2020
Grant date	Mar 3, 2020

Abstract

An air data probe is provided. The air data probe includes a pitot probe having a mounting base or flange, support strut, and tube with a forward facing inlet that is configured to capture a total pressure of the surrounding air, at least three dams placed within the tube of the pitot probe for blocking the ballistic trajectory of water droplets or ice crystals from passing directly through the tube to a downstream pressure sensing element, and a heater element integrated into the tube of the pitot probe on the outside of the dams. The at least three dams are oriented within the tube of the pitot probe in such a way that the dam locations are configured for two or more installations of the air data probe.

First claim

What is claimed is:

1. An air data probe comprising:
a pitot probe having a mounting base or flange, support strut, and tube with a forward facing inlet that is configured to capture a total pressure of the surrounding air;
at least three dams placed within the tube of the pitot probe for blocking the ballistic trajectory of water droplets or ice crystals from passing directly through the tube to a downstream pressure sensing element;
a heater element integrated into the tube of the pitot probe on the outside of the dams; and
wherein the at least three dams are oriented within the tube of the pitot probe such that a first pair of the at least three dams includes a first dam located in front of and above a second dam of the at least three dams in a first orientation of the pitot probe, and a second pair of the at least three dams includes a first dam located in front of and above a second dam of the at least three dams in a second orientation of the pitot probe, and, in each orientation, a drain hole is located in front of the second dam.

2. The air data probe of claim 1 , wherein
at least one of the at least three dams is positioned to provide a barrier to the flow of water or ice crystals along the bottom of the pitot probe when the air data probe is installed in the first orientation, wherein the at least one of the dams has a shape that blocks some of the internal flow path of the pitot probe, and
at least one other of the at least three dams is positioned to provide a barrier to the flow of water or ice crystals along the bottom of the pitot probe when the air data probe is installed in the second, different orientation, wherein the at least one other of the at least three dams has a shape that blocks some of the internal flow path of the pitot probe.

3. The air data probe of claim 1 , wherein each of the drain holes located in a position that is approximately in the bottom of the pitot probe for a respective orientation of the air data probe.

4. The air data probe of claim 1 , wherein the at least three dams comprises four dams with a first pair of dams configured for the first orientation and a second pair of dams configured for the second orientation.

5. The air data probe of claim 4 , wherein the first pair of dams includes a first forward dam that is located in a top half of the pitot probe and a first rear dam that is located in a bottom half of the pitot probe in the first orientation.

6. The air data probe of claim 5 , wherein the second pair of dams includes a second forward dam that is located in a top half of the pitot probe and a second rear dam that is located in a bottom half of the pitot probe in the second orientation.

7. A method for manufacturing an air data probe, the method comprising:
forming a pitot probe having a mounting base or flange, support strut, and a tube with a forward facing inlet that is configured to capture a total pressure of the surrounding air;
drilling two holes through the tube for insertion of a pair of dams, wherein the holes are located on opposite sides of a plane that bisects the tube along a central axis of the tube,
drilling at least one additional hole through the tube at a different location from the first two holes for insertion of at least one additional dam;
inserting dams in each of the holes, wherein the dams are configured for blocking the ballistic trajectory of water droplets or ice crystals from passing directly through the tube to a downstream pressure sensing element;
integrating a heater element into the tube of the pitot probe on the outside of the dams; and
wherein a first pair of the dams includes a first dam located in front of and above a second dam of the dams in a first orientation of the pitot probe, and a second pair of dams includes a first dam located in front of and above a second dam of the dams in a second orientation of the pitot probe, and, in each orientation, a drain hole is located in front of the second dam.

8. The method of claim 7 , wherein forming a pitot probe includes forming a channel in an exterior surface of the pitot probe to receive the hearting element.

9. The method of claim 7 , wherein drilling at least two holes and at least one additional hole comprises drilling four holes to receive two pair of dams, wherein each pair of dams is associated with a different orientation of the air data probe.

10. The method of claim 9 , and further including drilling at least two drain holes in the tube of the pitot probe, each drain hole associated with one of two different orientations of the air data probe.

Assignees

• Honeywell Int Inc

Inventors

• Anderson Morris G
• Payangapadan Murali Krishnan
• Venkatarayappa Narasimha Reddy
• Gordon Grant A
• Kandula Rama Sateesh Venkata

Classifications

• G01P5/165 Primary

  Arrangements or constructions of Pitot tubes · CPC title