Concentric probe
An example of a concentric probe includes an outer shroud having a bore that extends through the outer shroud, an inner shroud located within the outer shroud and having a bore that extends through the inner shroud, the inner shroud joined to the outer shroud via brazing, an annulus defined by a space between the inner shroud and a wall of the bore of the outer shroud, a plenum defined by a space between the inner shroud and the wall of the bore of the outer shroud, the plenum being in fluid communication with the annulus, and a transducer disposed within inner shroud.
1. A rake for measuring inlet distortion of a turbine inlet, the rake comprising:
a base comprising a removable cover and an opening formed through the base, wherein the opening is blocked by the removable cover when the removable cover is attached to the base; and
a body secured to the base and comprising:
a removable side wall; and
a concentric probe secured to the body.
2. The rake of claim 1 , comprising a sensor module secured to the base and coupled to the concentric probe.
3. The rake of claim 1 , comprising a seal disposed between the body and the base to prevent passage of air through a slot of a frame to which the rake is secured.
4. The rake of claim 1 , wherein the removable side wall comprises a ridge that is configured to slide within a track of the body to allow removal of the removable side wall.
5. The rake of claim 1 , wherein the concentric probe comprises:
an outer shroud having a bore that extends through the outer shroud;
an inner shroud located within the outer shroud and having a bore that extends through the inner shroud, the inner shroud joined to the outer shroud via brazing;
an annulus defined by a space between the inner shroud and a wall of the bore of the outer shroud;
a plenum defined by a space between the inner shroud and the wall of the bore of the outer shroud, the plenum being in fluid communication with the annulus; and
a transducer disposed within inner shroud.
6. The rake of claim 5 , wherein the inner shroud is joined to the outer shroud via brazing.
7. The rake of claim 5 , wherein the inner shroud comprises a head with a bore formed therethrough, the bore being in fluid communication with the plenum.
8. The rake of claim 7 , wherein an axis of the bore of the head is parallel to an axis of the plenum.
9. An inlet distortion measurement system comprising:
a frame comprising a slot; and
a rake extending through the slot of the frame, the rake comprising:
a base comprising a removable cover and an opening formed through the base, wherein the opening is blocked by the removable cover when the removable cover is attached to the base; and
a body secured to the base and comprising:
a removable side wall; and
a concentric probe secured to the body.
10. The inlet distortion measurement system of claim 9 , wherein the removable side wall comprises a ridge that is configured to slide within a track of the body to allow removal of the removable side wall.
11. The inlet distortion measurement system of claim 9 , wherein the concentric probe comprises:
an outer shroud having a bore that extends through the outer shroud;
an inner shroud located within the outer shroud and having a bore that extends through the inner shroud, the inner shroud joined to the outer shroud via brazing;
an annulus defined by a space between the inner shroud and a wall of the bore of the outer shroud;
a plenum defined by a space between the inner shroud and the wall of the bore of the outer shroud, the plenum being in fluid communication with the annulus; and
a transducer disposed within inner shroud.
12. The inlet distortion measurement system of claim 11 , wherein the inner shroud is joined to the outer shroud via brazing.
13. The inlet distortion measurement system of claim 11 , wherein the inner shroud comprises a head with a bore formed therethrough, the bore being in fluid communication with the plenum.
14. The inlet distortion measurement system of claim 13 , wherein an axis of the bore of the head is parallel to an axis of the plenum.