Corrision-resistant heated air data probe

Patent metadata

Field	Value
Publication number	US-9772345-B2
Application number	US-201615045907-A
Country	US
Kind code	B2
Filing date	Feb 17, 2016
Priority date	Apr 2, 2015
Publication date	Sep 26, 2017
Grant date	Sep 26, 2017

Abstract

An air data probe is disclosed. The air data probe may include a probe body having an interior cavity and coated by a protective shell. A sensing port may be disposed in the air data probe and may extend through the probe body. The sensing port may also be lined by the protective shell. The protective shell may be made of an austenitic nickel-chromium alloy, or stainless steel, or any relatively corrosion resistant material. The probe body may be made of nickel, or a nickel alloy, or any relatively thermally conductive material. The protective shell may be joined to the probe body by additive manufacturing, such as laser cladding. In this manner, an air data probe capable withstanding high temperatures without corrosion and yet also being relatively thermally conductive is disclosed.

First claim

The invention claimed is:

1. An air data probe comprising:
a protective shell comprising a material coating applied to a probe body and isolating a surface of the probe body from fluidic communication with an environment;
a first sensing port defined by the probe body and positioned at an outermost end of the probe body and in fluidic communication with the environment;
a first interior cavity comprising a volume defined by the probe body and disposed internal to the probe body, the first interior cavity in fluidic communication with the first sensing port; and
a heating element inside the first interior cavity whereby at least one of the probe body and the protective shell is heated.

2. The air data probe according to claim 1 , wherein the protective shell comprises a local protective shell thickness variation comprising a thickening of the protective shell and wherein the probe body comprises a local probe body thickness variation comprising a thinning of the probe body corresponding to the local protective shell thickness variation.

3. The air data probe according to claim 1 , wherein the probe body extends from a mounting structure comprising an aircraft.

4. The air data probe according to claim 1 , wherein the probe body comprises nickel and the protective shell comprises at least one of an austenitic nickel-chromium alloy and stainless steel.

5. The air data probe according to claim 1 , wherein the protective shell further comprises a material coating applied to the first sensing port and isolating a surface of the first sensing port from fluidic communication with the environment.

6. The air data probe according to claim 5 , wherein the protective shell further comprises a material coating applied to the heating element and isolating a surface of the heating element from fluidic communication with the environment.

7. The air data probe according to claim 1 , further comprising:
a second sensing port defined by the probe body and positioned at a side of the probe body and in fluidic communication with the environment;
a second interior cavity comprising a volume defined by the probe body and disposed internal to the probe body, the second interior cavity in fluidic communication with the second sensing port.

8. The air data probe according to claim 1 , wherein the first sensing port comprises:
a sensing port recess comprising an indentation formed in the probe body;
a port protective shell section comprising a portion of the protective shell disposed over the sensing port recess and forming a substantially continuous surface over the indentation; and
a port passage comprising an aperture defined by the port protective shell section and in fluidic communication with the environment and the first interior cavity, and whereby a portion of the port protective shell lines the port passage.

9. The air data probe according to claim 8 , wherein the port passage is aligned coincident with a geometric center of the sensing port recess.

10. The air data probe according to claim 8 , wherein the indentation comprises a dimple.

11. The air data probe according to claim 8 , wherein the indentation comprises at least one point of inflection.

12. The air data probe according to claim 8 , wherein the probe body and the protective shell comprise materials adjacent on a galvanic series chart.

Assignees

• Rosemount Aerospace Inc

Inventors

• Golly Timothy Thomas
• Anderson Matthew P
• Johnson Paul Robert
• Seidel Greg

Classifications

• G01P1/026

  for speed measuring devices, e.g. pulse generator · CPC title

• G01P5/165 Primary

  Arrangements or constructions of Pitot tubes · CPC title

• G01P13/025

  indicating air data, i.e. flight variables of an aircraft, e.g. angle of attack, side slip, shear, yaw · CPC title

• G01F1/46

  Pitot tubes · CPC title

• G01D11/245

  Housings for sensors · CPC title