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A pitot tube includes a wall that extends longitudinally along an axis. The wall defines an inlet aperture at a longitudinal end of the wall, an outlet aperture opposite the inlet aperture, an interior cavity extending from the inlet aperture to an outlet aperture, a passage extending through and pe

A pitot tube includes a wall that extends longitudinally along an axis. The wall defines an inlet aperture at a longitudinal end of the wall, an outlet aperture opposite the inlet aperture, an interior cavity extending from the inlet aperture to an outlet aperture, a passage extending through and perpendicular to the wall having an outlet along an exterior surface of the wall, and an augmenting feature configured to reduce a static pressure at the outlet of the passage. In another embodiment, a wall defines a passage and an augmenting feature that modifies a flow direction of fluid flowing across an outlet of the passage such that a static pressure of the fluid at the outlet is reduced relative to the wall without the augmenting feature.

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1. A pitot tube comprising: a wall extending longitudinally along an axis, wherein the wall defines: an inlet aperture at a longitudinal end of the wall;an outlet aperture opposite the inlet aperture;an interior cavity extending from the inlet aperture to an outlet aperture, wherein the inlet apertu

1. A pitot tube comprising: a wall extending longitudinally along an axis, wherein the wall defines: an inlet aperture at a longitudinal end of the wall;an outlet aperture opposite the inlet aperture;an interior cavity extending from the inlet aperture to an outlet aperture, wherein the inlet aperture places the interior cavity in communication with a space exterior to the wall;a passage extending through and perpendicular to the wall having an outlet along an exterior surface of the wall; andan augmenting feature configured to reduce a static pressure at the outlet of the passage. 2. The pitot tube of claim 1, wherein the augmenting feature is a protrusion having a wedge-shaped longitudinal cross-section. 3. The pitot tube of claim 2, wherein a radial thickness of the protrusion increases from an upstream end of the protrusion closest to the inlet aperture to a longitudinal location between the upstream end and a central axis of the passage. 4. The pitot tube of claim 3, wherein a maximum radial thickness of the protrusion is coincident with the central axis of the passage. 5. The pitot tube of claim 2, wherein the protrusion has a radial thickness defined by a linear profile or a second order polynomial profile. 6. The pitot tube of claim 2, wherein the protrusion has a length in the longitudinal direction at least 5 times a diameter of the passage, a width transverse to the longitudinal direction at least 3 times the diameter of the passage, and a maximum radial thickness at least 0.25 times the diameter of the passage. 7. The pitot tube of claim 1, wherein the augmenting feature is a groove extending substantially parallel to the longitudinal direction and intersecting a central axis of the passage, and wherein the groove extends a first length from the passage to an upstream end towards the inlet aperture and a second length from the passage to a downstream end opposite the upstream end. 8. The pitot tube of claim 7, wherein the first length is different than the second length. 9. The pitot tube of claim 7, wherein the second length is greater than or equal to the first length. 10. The pitot tube of claim 7, wherein the groove has a width transverse to the longitudinal direction that is less than or equal to a diameter of the passage. 11. The pitot tube of claim 1, wherein the augmenting feature is a protrusion having a wedge-shaped longitudinal cross-section in which the protrusion has a groove extending substantially parallel to the longitudinal direction. 12. The pitot tube of claim 11, where the groove extends from the passage to a surface of the protrusion that extends longitudinally. 13. The pitot tube of claim 11, wherein the groove has an end face joining a first side face to a second side face, and wherein the end face forms a fillet between the first and second side faces. 14. An apparatus comprising: a wall extending in a longitudinal direction to partition an interior volume from an exterior space, wherein the wall defines: a passage extending through and perpendicular to the wall, wherein the passage has an outlet along an exterior surface of the wall; andan augmenting feature that directs a fluid across the outlet of the passage such that a static pressure of the fluid at the outlet is reduced. 15. The apparatus of claim 14, wherein the augmenting feature is a protrusion having a wedge-shaped longitudinal cross-section. 16. The apparatus of claim 15, wherein a radial thickness of the protrusion increases from an upstream end of the protrusion farthest from the passage to a longitudinal location between the upstream end and a central axis of the passage. 17. The apparatus of claim 16, wherein a maximum radial thickness of the protrusion is coincident with the central axis of the passage. 18. The apparatus of claim 14, wherein the augmenting feature is a groove extending substantially parallel to the longitudinal direction and intersecting a central axis of the passage, and wherein the groove extends a first length from the passage to an upstream end towards the inlet aperture and a second length from the passage to a downstream end opposite the upstream end. 19. The apparatus of claim 18, wherein the second length is greater than or equal to the first length. 20. The apparatus of claim 14, wherein the augmenting feature is a protrusion having a wedge-shaped longitudinal cross-section in which the protrusion has a groove extending substantially parallel to the longitudinal direction.