Engine intake pressure and temperature sensor performance enhancement

An inlet of a gas turbine engine, the inlet comprising:

• a casing having a casing inner wall defining an inlet flowpath;
• and
• at least one pressure and temperature probe extending inwardly from the casing inner wall toward an engine central longitudinal axis, the at least one pressure and temperature probe including:
• a base portion;
• an airfoil portion extending from the base portion to an end portion located at a distal end of the probe furthest from the base portion, the airfoil portion including a leading edge disposed at an upstream end of the probe relative to a direction of airflow across the probe;
• a temperature sensor disposed in a temperature sensor chamber located in the airfoil portion, wherein the temperature sensor extends along a central axis of the temperature sensor chamber;
• and
• a temperature airflow hole in the distal end of the probe, the temperature airflow hole configured to admit an airflow into the temperature sensor chamber via a surface sloped from the end portion toward the base portion,
• wherein the temperature airflow hole has an airflow hole central axis that is offset from the central axis of the temperature sensor chamber in a streamwise direction, and
• wherein the temperature airflow hole is configured and positioned such that the airflow admitted via the temperature airflow hole has a turning angle of less than 90 degrees into the temperature sensor chamber from the distal end of the probe.

A gas turbine engine, comprising:

• a fan driven by a turbine of the gas turbine engine;
• and
• an inlet disposed upstream of the fan, the inlet including:
• a casing having a casing inner wall defining an inlet flowpath;
• and
• at least one pressure and temperature probe extending inwardly from the casing inner wall toward an engine central longitudinal axis, the at least one pressure and temperature probe including:
• a base portion;
• an airfoil portion extending from the base portion to an end portion located at a distal end of the probe furthest from the base portion, the airfoil portion including a leading edge disposed at an upstream end of the probe relative to a direction of airflow across the probe;
• a temperature sensor disposed in a temperature sensor chamber located in the airfoil portion, wherein the temperature sensor extends along a central axis of the temperature sensor chamber;
• and
• a temperature airflow hole in the distal end of the probe, the temperature airflow hole configured to admit an airflow into the temperature sensor chamber via a surface sloped from the end portion toward the base portion,
• wherein the temperature airflow hole has an airflow hole central axis that is offset from the central axis of the temperature sensor chamber in a streamwise direction, and
• wherein the temperature airflow hole is configured and positioned such that the airflow admitted via the temperature airflow hole has a turning angle of less than 90 degrees into the temperature sensor chamber from the distal end of the probe.