Time-of-flight tip-clearance measurements

H. S. Dhadwal; A. P. Kurkov; D. C. Janetzke

Time-of-flight tip-clearance measurements

H. S. Dhadwal
, A. P. Kurkov
, D. C. Janetzke

Electrical Engineering

NASA Glenn Research Center

Research output: Contribution to conference › Paper › peer-review

9 Scopus citations

Abstract

In this paper a time-of-flight probe system incorporating the two integrated fiber optic probes which are tilted equally relative to the probe holder centerline, is applied for the first time to measure the tip clearance of an advanced fan prototype. Tip clearance is largely independent of the signal amplitude and it relies on timing measurement. This work exposes optical effects associated with the fan blade stagger angle that were absent during the original spin-rig experiment on the zero stagger rotor. Individual blade tip clearances were measured with accuracy of ±0.127-mm (+0.005-in). Probe features are discussed and improvements to the design are suggested.

Original language	English
State	Published - 1999
Event	35th Joint Propulsion Conference and Exhibit, 1999 - Los Angeles, United States Duration: Jun 20 1999 → Jun 24 1999

Conference

Conference	35th Joint Propulsion Conference and Exhibit, 1999
Country/Territory	United States
City	Los Angeles
Period	06/20/99 → 06/24/99

Cite this

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title = "Time-of-flight tip-clearance measurements",

abstract = "In this paper a time-of-flight probe system incorporating the two integrated fiber optic probes which are tilted equally relative to the probe holder centerline, is applied for the first time to measure the tip clearance of an advanced fan prototype. Tip clearance is largely independent of the signal amplitude and it relies on timing measurement. This work exposes optical effects associated with the fan blade stagger angle that were absent during the original spin-rig experiment on the zero stagger rotor. Individual blade tip clearances were measured with accuracy of ±0.127-mm (+0.005-in). Probe features are discussed and improvements to the design are suggested.",

author = "Dhadwal, \{H. S.\} and Kurkov, \{A. P.\} and Janetzke, \{D. C.\}",

note = "Publisher Copyright: {\textcopyright} 1999 by the American Institute of Aeronautics and Astronautics. All rights reserved.; 35th Joint Propulsion Conference and Exhibit, 1999 ; Conference date: 20-06-1999 Through 24-06-1999",

year = "1999",

language = "English",

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TY - CONF

T1 - Time-of-flight tip-clearance measurements

AU - Dhadwal, H. S.

AU - Kurkov, A. P.

AU - Janetzke, D. C.

PY - 1999

Y1 - 1999

N2 - In this paper a time-of-flight probe system incorporating the two integrated fiber optic probes which are tilted equally relative to the probe holder centerline, is applied for the first time to measure the tip clearance of an advanced fan prototype. Tip clearance is largely independent of the signal amplitude and it relies on timing measurement. This work exposes optical effects associated with the fan blade stagger angle that were absent during the original spin-rig experiment on the zero stagger rotor. Individual blade tip clearances were measured with accuracy of ±0.127-mm (+0.005-in). Probe features are discussed and improvements to the design are suggested.

AB - In this paper a time-of-flight probe system incorporating the two integrated fiber optic probes which are tilted equally relative to the probe holder centerline, is applied for the first time to measure the tip clearance of an advanced fan prototype. Tip clearance is largely independent of the signal amplitude and it relies on timing measurement. This work exposes optical effects associated with the fan blade stagger angle that were absent during the original spin-rig experiment on the zero stagger rotor. Individual blade tip clearances were measured with accuracy of ±0.127-mm (+0.005-in). Probe features are discussed and improvements to the design are suggested.

UR - https://www.scopus.com/pages/publications/84963795378

M3 - Paper

AN - SCOPUS:84963795378

T2 - 35th Joint Propulsion Conference and Exhibit, 1999

Y2 - 20 June 1999 through 24 June 1999

ER -

Time-of-flight tip-clearance measurements

Abstract

Conference

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