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Ice detector configuration for improved ice detection at near freezing conditions

a technology of ice detector and configuration, which is applied in the direction of de-icing equipment, instruments, transportation and packaging, etc., can solve the problems of ice on the probe at temperatures, and achieve the effect of improving the detection efficiency of ice detection

Inactive Publication Date: 2006-09-19
ROSEMOUNT AEROSPACE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0005]The present invention relates to an ice detector strut and probe assembly that has a geometrical configuration that will alter the pressure distribution around the probe and reduce the temperature at some regions of the probe to a level less than the temperature on the critical surface of the aircraft that is to be protected from ice formation.

Problems solved by technology

Using a probe with a shorter chord length, and having an appropriate airfoil shape relative to the shape of the wing, results in accretion of ice on the probe at temperatures above the critical temperature of the wing.

Method used

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  • Ice detector configuration for improved ice detection at near freezing conditions
  • Ice detector configuration for improved ice detection at near freezing conditions
  • Ice detector configuration for improved ice detection at near freezing conditions

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Embodiment Construction

[0032]In FIG. 1, a typical aircraft indicated at 10 is of conventional design, and includes an airfoil cross section shape wing 12, and as shown has an ice detector probe assembly 14 made according to the present invention, supported on the skin or outer wall 16 of the aircraft. The ice detector probe assembly 14 is positioned relative to the wing 12 at a known location that is selected to provide for detection of ice as air flows past the wing and the aircraft skin 16. In FIG. 2, it can be seen that the ice detector probe assembly 14, including rounded upstream section 13 and the downstream section 15 forms an airfoil cross sectional shape.

[0033]In performing analysis of the effectiveness of an airfoil cross section ice detector probe, LEWICEv 1.6 (or a comparable program), a Computational Fluid Dynamics (CFD) simulation of icing environments, can be used to parametrically determine the effect of variables such as liquid water content (LWC), Median Volume Diameter (MVD), ambient te...

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PUM

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Abstract

An ice detector for an aircraft comprises a strut and probe assembly, and it is positioned on the aircraft so that the pressure field around the ice detector causes a lower temperature region on the probe assembly compared to the aircraft. Ice will therefore form on the probe assembly before it forms on the aircraft to provide an early warning of icing conditions near freezing temperatures.

Description

BACKGROUND OF THE INVENTION[0001]The present invention relates to a configuration of an ice detector that detects ice at temperatures that are near freezing and which has a pressure field that reduces the pressure on surface regions so that such regions cool to a lower temperature as air flows past the detector to detect ice prior to formation on critical aircraft surfaces. The ice detector is used on air vehicles and provides a warning of actual ice accretion.[0002]Existing magnetostrictive ice detectors perform well over the typical aircraft performance envelope. However, as more and more aircraft are designed with high performance wings situations may arise at temperatures near freezing where ice will form on a wing while the conventional ice detector provides no information indicating ice. The critical temperature is defined as the temperature above which no ice will form on a structure given the aircraft configuration and other atmospheric conditions. The critical temperature c...

Claims

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Application Information

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IPC IPC(8): G08B19/02B64D15/20
CPCB64D15/20G08B19/02
Inventor CRONIN, DENNIS J.JACKSON, DARREN G.OWENS, DAVID G.
Owner ROSEMOUNT AEROSPACE
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